Isotopes of radium: Difference between revisions
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Line 9: | Line 9: | ||
! <br />isotopic mass (u)<br /> |
! <br />isotopic mass (u)<br /> |
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! rowspan="2" | half-life |
! rowspan="2" | half-life |
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! rowspan="2" | decay<br>mode(s)<ref>http://www.nucleonica.net/unc.aspx</ref><ref group="n">Abbreviations:<br>CD: [[Cluster decay]]<br>EC: [[Electron capture]]<br>IT: [[Isomeric transition]]</ref> |
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! rowspan="2" | daughter<br>isotope(s) |
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! rowspan="2" | nuclear<br />spin |
! rowspan="2" | nuclear<br />spin |
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! rowspan="2" | representative<br />isotopic<br />composition<br />(mole fraction) |
! rowspan="2" | representative<br />isotopic<br />composition<br />(mole fraction) |
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Line 21: | Line 23: | ||
| 202.00989(7) |
| 202.00989(7) |
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| 2.6(21) ms<br>[0.7(+33-3) ms] |
| 2.6(21) ms<br>[0.7(+33-3) ms] |
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| 0+ |
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| |
| |
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| |
| |
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| 0+ |
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| <sup>203</sup>Ra |
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| |
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| style="text-align:right" | 88 |
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| style="text-align:right" | 115 |
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| 203.00927(9) |
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| 4(3) ms |
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| (3/2-) |
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| |
| |
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| |
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|- |
|- |
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| |
| rowspan=2|<sup>203</sup>Ra |
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| rowspan=2| |
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| |
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| |
| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 115 |
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| 41(17) ms |
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| rowspan=2|203.00927(9) |
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| (13/2+) |
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| rowspan=2|4(3) ms |
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| |
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| [[alpha decay|α]] |
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| |
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| <sup>199</sup>Rn |
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| rowspan=2|(3/2-) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| <sup> |
| [[beta decay|β<sup>+</sup>]] (rare) |
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| <sup>203</sup>Fr |
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| |
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| style="text-align:right" | 88 |
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| style="text-align:right" | 116 |
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| 204.006500(17) |
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| 60(11) ms<br>[59(+12-9) ms] |
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| 0+ |
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| |
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| |
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|- |
|- |
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| rowspan=2 style="text-indent:1em" | <sup>203m</sup>Ra |
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| rowspan=2| |
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| rowspan=2 colspan="3" style="text-indent:2em" | 220(90) keV |
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| rowspan=2|41(17) ms |
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| α |
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| <sup>199</sup>Rn |
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| rowspan=2|(13/2+) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (rare) |
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| <sup>203</sup>Fr |
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|- |
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| rowspan=2|<sup>204</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 116 |
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| rowspan=2|204.006500(17) |
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| rowspan=2|60(11) ms<br>[59(+12-9) ms] |
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| α (99.7%) |
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| <sup>200</sup>Rn |
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| rowspan=2|0+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (.3%) |
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| <sup>204</sup>Fr |
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|- |
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| rowspan=2|<sup>205</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 117 |
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| rowspan=2|205.00627(9) |
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| rowspan=2|220(40) ms<br>[210(+60-40) ms] |
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| α |
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| <sup>201</sup>Rn |
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| rowspan=2|(3/2-) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (rare) |
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| <sup>205</sup>Fr |
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|- |
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| rowspan=2|style="text-indent:1em" | <sup>205m</sup>Ra |
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| rowspan=2| |
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| rowspan=2 colspan="3" style="text-indent:2em" | 310(110)# keV |
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| rowspan=2|180(50) ms<br>[170(+60-40) ms] |
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| α |
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| <sup>201</sup>Rn |
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| rowspan=2|(13/2+) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| [[Isomeric transition|IT]] (rare) |
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| <sup>205</sup>Ra |
| <sup>205</sup>Ra |
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| |
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| style="text-align:right" | 88 |
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| style="text-align:right" | 117 |
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| 205.00627(9) |
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| 220(40) ms<br>[210(+60-40) ms] |
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| (3/2-) |
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| |
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|- |
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| style="text-indent:1em" | <sup>205m</sup>Ra |
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| colspan="3" style="text-indent:2em" | 310(110)# keV |
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| 180(50) ms<br>[170(+60-40) ms] |
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| (13/2+) |
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|- |
|- |
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| <sup>206</sup>Ra |
| <sup>206</sup>Ra |
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Line 77: | Line 106: | ||
| 206.003827(19) |
| 206.003827(19) |
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| 0.24(2) s |
| 0.24(2) s |
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| α |
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| <sup>202</sup>Rn |
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| 0+ |
| 0+ |
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| |
| |
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|- |
|- |
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| rowspan=2|<sup>207</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 119 |
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| rowspan=2|207.00380(6) |
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| rowspan=2|1.3(2) s |
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| α (90%) |
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| <sup>203</sup>Rn |
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| rowspan=2|(5/2-,3/2-) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (10%) |
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| <sup>207</sup>Fr |
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|- |
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| rowspan=3 style="text-indent:1em" | <sup>207m</sup>Ra |
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| rowspan=3| |
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| rowspan=3 colspan="3" style="text-indent:2em" | 560(50) keV |
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| rowspan=3|57(8) ms |
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| IT (85%) |
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| <sup>207</sup>Ra |
| <sup>207</sup>Ra |
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| rowspan=3|(13/2+) |
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| |
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| rowspan=3| |
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| style="text-align:right" | 88 |
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| rowspan=3| |
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| style="text-align:right" | 119 |
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| 207.00380(6) |
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| 1.3(2) s |
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| (5/2-,3/2-) |
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|- |
|- |
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| α (15%) |
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| style="text-indent:1em" | <sup>207m</sup>Ra |
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| <sup>203</sup>Rn |
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| colspan="3" style="text-indent:2em" | 560(50) keV |
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| 57(8) ms |
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| (13/2+) |
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|- |
|- |
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| <sup> |
| β<sup>+</sup> (.55%) |
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| <sup>207</sup>Fr |
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|- |
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| style="text-align:right" | 88 |
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| rowspan=2|<sup>208</sup>Ra |
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| style="text-align:right" | 120 |
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| rowspan=2| |
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| 208.001840(17) |
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| rowspan=2 style="text-align:right" | 88 |
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| 1.3(2) s |
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| rowspan=2 style="text-align:right" | 120 |
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| 0+ |
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| rowspan=2|208.001840(17) |
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| |
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| rowspan=2|1.3(2) s |
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| α (95%) |
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| <sup>204</sup>Rn |
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| rowspan=2|0+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (5%) |
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| <sup>208</sup>Fr |
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|- |
|- |
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| style="text-indent:1em" | <sup>208m</sup>Ra |
| style="text-indent:1em" | <sup>208m</sup>Ra |
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Line 113: | Line 162: | ||
| colspan="3" style="text-indent:2em" | 1800(200) keV |
| colspan="3" style="text-indent:2em" | 1800(200) keV |
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| 270 ns |
| 270 ns |
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| (8+) |
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| |
| |
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| (8+) |
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|- |
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| <sup>209</sup>Ra |
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| |
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| style="text-align:right" | 88 |
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| style="text-align:right" | 121 |
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| 209.00199(5) |
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| 4.6(2) s |
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| 5/2- |
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| |
| |
||
| |
| |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>209</sup>Ra |
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| rowspan=2| |
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| |
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| style="text-align:right" | 88 |
| rowspan=2 style="text-align:right" | 88 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 121 |
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| rowspan=2|209.00199(5) |
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| 210.000495(16) |
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| rowspan=2|4.6(2) s |
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| α (90%) |
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| 0+ |
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| <sup>205</sup>Rn |
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| |
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| rowspan=2|5/2- |
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| |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (10%) |
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| <sup>209</sup>Fr |
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|- |
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| rowspan=2|<sup>210</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 122 |
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| rowspan=2|210.000495(16) |
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| rowspan=2|3.7(2) s |
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| α (96%) |
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| <sup>206</sup>Rn |
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| rowspan=2|0+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (4%) |
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| <sup>210</sup>Fr |
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|- |
|- |
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| style="text-indent:1em" | <sup>210m</sup>Ra |
| style="text-indent:1em" | <sup>210m</sup>Ra |
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Line 141: | Line 202: | ||
| colspan="3" style="text-indent:2em" | 1800(200) keV |
| colspan="3" style="text-indent:2em" | 1800(200) keV |
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| 2.24 µs |
| 2.24 µs |
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| (8+) |
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| |
| |
||
| |
| |
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| (8+) |
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|- |
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| <sup>211</sup>Ra |
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| |
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| style="text-align:right" | 88 |
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| style="text-align:right" | 123 |
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| 211.000898(28) |
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| 13(2) s |
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| 5/2(-) |
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| |
| |
||
| |
| |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>211</sup>Ra |
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| rowspan=2| |
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| |
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| style="text-align:right" | 88 |
| rowspan=2 style="text-align:right" | 88 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 123 |
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| 211. |
| rowspan=2|211.000898(28) |
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| 13 |
| rowspan=2|13(2) s |
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| α (97%) |
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| 0+ |
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| <sup>207</sup>Rn |
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| |
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| rowspan=2|5/2(-) |
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| |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (3%) |
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| <sup>207</sup>Fr |
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|- |
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| rowspan=2|<sup>212</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 124 |
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| rowspan=2|211.999794(12) |
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| rowspan=2|13.0(2) s |
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| α (85%) |
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| <sup>208</sup>Rn |
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| rowspan=2|0+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (15%) |
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| <sup>212</sup>Fr |
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|- |
|- |
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| style="text-indent:1em" | <sup>212m1</sup>Ra |
| style="text-indent:1em" | <sup>212m1</sup>Ra |
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Line 169: | Line 242: | ||
| colspan="3" style="text-indent:2em" | 1958.4(5) keV |
| colspan="3" style="text-indent:2em" | 1958.4(5) keV |
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| 10.9(4) µs |
| 10.9(4) µs |
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| |
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| |
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| (8)+ |
| (8)+ |
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| |
| |
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Line 177: | Line 252: | ||
| colspan="3" style="text-indent:2em" | 2613.4(5) keV |
| colspan="3" style="text-indent:2em" | 2613.4(5) keV |
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| 0.85(13) µs |
| 0.85(13) µs |
||
| |
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| |
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| (11)- |
| (11)- |
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| |
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| |
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|- |
|- |
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| rowspan=2|<sup>213</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 125 |
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| rowspan=2|213.000384(22) |
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| rowspan=2|2.74(6) min |
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| α (80%) |
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| <sup>209</sup>Rn |
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| rowspan=2|1/2- |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (20%) |
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| <sup>213</sup>Fr |
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|- |
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| rowspan=2 style="text-indent:1em" | <sup>213m</sup>Ra |
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| rowspan=2| |
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| rowspan=2 colspan="3" style="text-indent:2em" | 1769(6) keV |
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| rowspan=2|2.1(1) ms |
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| IT (99%) |
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| <sup>213</sup>Ra |
| <sup>213</sup>Ra |
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| rowspan=2|17/2-# |
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| |
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| rowspan=2| |
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| style="text-align:right" | 88 |
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| rowspan=2| |
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| style="text-align:right" | 125 |
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| 213.000384(22) |
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| 2.74(6) min |
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| 1/2- |
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| |
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| |
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|- |
|- |
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| α (1%) |
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| style="text-indent:1em" | <sup>213m</sup>Ra |
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| <sup>209</sup>Rn |
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| |
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| colspan="3" style="text-indent:2em" | 1769(6) keV |
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| 2.1(1) ms |
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| 17/2-# |
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| |
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| |
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|- |
|- |
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| <sup>214</sup>Ra |
| rowspan=2|<sup>214</sup>Ra |
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| rowspan=2| |
|||
| |
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| style="text-align:right" | 88 |
| rowspan=2 style="text-align:right" | 88 |
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| style="text-align:right" | 126 |
| rowspan=2 style="text-align:right" | 126 |
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| 214.000108(10) |
| rowspan=2|214.000108(10) |
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| 2.46(3) s |
| rowspan=2|2.46(3) s |
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| α (99.94%) |
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| 0+ |
|||
| <sup>210</sup>Rn |
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| |
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| rowspan=2|0+ |
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| |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (.06%) |
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| <sup>214</sup>Fr |
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|- |
|- |
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| <sup>215</sup>Ra |
| <sup>215</sup>Ra |
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Line 215: | Line 307: | ||
| 215.002720(8) |
| 215.002720(8) |
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| 1.55(7) ms |
| 1.55(7) ms |
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| α |
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| <sup>211</sup>Rn |
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| (9/2+)# |
| (9/2+)# |
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| |
| |
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Line 223: | Line 317: | ||
| colspan="3" style="text-indent:2em" | 1877.8(5) keV |
| colspan="3" style="text-indent:2em" | 1877.8(5) keV |
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| 7.1(2) µs |
| 7.1(2) µs |
||
| |
|||
| |
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| (25/2+) |
| (25/2+) |
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| |
| |
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Line 231: | Line 327: | ||
| colspan="3" style="text-indent:2em" | 2246.9(5) keV |
| colspan="3" style="text-indent:2em" | 2246.9(5) keV |
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| 1.39(7) µs |
| 1.39(7) µs |
||
| |
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| |
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| (29/2-) |
| (29/2-) |
||
| |
| |
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Line 239: | Line 337: | ||
| colspan="3" style="text-indent:2em" | 3756.6(6)+X keV |
| colspan="3" style="text-indent:2em" | 3756.6(6)+X keV |
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| 0.555(10) µs |
| 0.555(10) µs |
||
| (43/2-) |
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| |
| |
||
| |
| |
||
|- |
| (43/2-) |
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| <sup>216</sup>Ra |
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| |
|||
| style="text-align:right" | 88 |
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| style="text-align:right" | 128 |
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| 216.003533(9) |
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| 182(10) ns |
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| 0+ |
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| |
| |
||
| |
| |
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|- |
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| rowspan=2|<sup>216</sup>Ra |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 88 |
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| rowspan=2 style="text-align:right" | 128 |
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| rowspan=2|216.003533(9) |
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| rowspan=2|182(10) ns |
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| α |
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| <sup>212</sup>Rn |
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| rowspan=2|0+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| [[Electron capture|EC]] (1E-8%) |
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| <sup>216</sup>Fr |
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|- |
|- |
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| <sup>217</sup>Ra |
| <sup>217</sup>Ra |
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Line 259: | Line 364: | ||
| 217.006320(9) |
| 217.006320(9) |
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| 1.63(17) µs |
| 1.63(17) µs |
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| α |
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| <sup>213</sup>Rn |
|||
| (9/2+) |
| (9/2+) |
||
| |
| |
||
| |
| |
||
|- |
|- |
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| <sup>218</sup>Ra |
| rowspan=2|<sup>218</sup>Ra |
||
| rowspan=2| |
|||
| |
|||
| style="text-align:right" | 88 |
| rowspan=2 style="text-align:right" | 88 |
||
| style="text-align:right" | 130 |
| rowspan=2 style="text-align:right" | 130 |
||
| 218.007140(12) |
| rowspan=2|218.007140(12) |
||
| 25.2(3) µs |
| rowspan=2|25.2(3) µs |
||
| |
| α |
||
| <sup>214</sup>Rn |
|||
| |
|||
| rowspan=2|0+ |
|||
| |
|||
| rowspan=2| |
|||
| rowspan=2| |
|||
|- |
|||
| β<sup>+</sup>β<sup>+</sup> (rare) |
|||
| <sup>218</sup>Rn |
|||
|- |
|- |
||
| <sup>219</sup>Ra |
| <sup>219</sup>Ra |
||
Line 279: | Line 391: | ||
| 219.010085(9) |
| 219.010085(9) |
||
| 10(3) ms |
| 10(3) ms |
||
| α |
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| <sup>215</sup>Rn |
|||
| (7/2)+ |
| (7/2)+ |
||
| |
| |
||
Line 289: | Line 403: | ||
| 220.011028(10) |
| 220.011028(10) |
||
| 17.9(14) ms |
| 17.9(14) ms |
||
| α |
|||
| <sup>216</sup>Rn |
|||
| 0+ |
| 0+ |
||
| |
| |
||
| |
| |
||
|- |
|- |
||
| <sup>221</sup>Ra |
| rowspan=2|<sup>221</sup>Ra |
||
| rowspan=2| |
|||
| |
|||
| style="text-align:right" | 88 |
| rowspan=2 style="text-align:right" | 88 |
||
| style="text-align:right" | 133 |
| rowspan=2 style="text-align:right" | 133 |
||
| 221.013917(5) |
| rowspan=2|221.013917(5) |
||
| 28(2) s |
| rowspan=2|28(2) s |
||
| |
| α |
||
| <sup>217</sup>Rn |
|||
| |
|||
| rowspan=2|5/2+ |
|||
| |
|||
| rowspan=2| |
|||
| rowspan=2| |
|||
|- |
|- |
||
| [[Cluster decay|CD]] (1.2E-10%) |
|||
| <sup>222</sup>Ra |
|||
| <sup>207</sup>Pb, [[Carbon-14|<sup>14</sup>C]] |
|||
| |
|||
| style="text-align:right" | 88 |
|||
| style="text-align:right" | 134 |
|||
| 222.015375(5) |
|||
| 38.0(5) s |
|||
| 0+ |
|||
| |
|||
| |
|||
|- |
|- |
||
| <sup> |
| rowspan=2|<sup>222</sup>Ra |
||
| rowspan=2| |
|||
| Actinium X |
|||
| style="text-align:right" | 88 |
| rowspan=2 style="text-align:right" | 88 |
||
| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 134 |
||
| rowspan=2|222.015375(5) |
|||
| 223.0185022(27) |
|||
| |
| rowspan=2|38.0(5) s |
||
| |
| α |
||
| <sup>218</sup>Rn |
|||
| <ref group="n">Occurs in trace quantities in nature as an intermediate [[decay product]] of [[Uranium-235|<sup>235</sup>U]]</ref> |
|||
| rowspan=2|0+ |
|||
| |
|||
| rowspan=2| |
|||
| rowspan=2| |
|||
|- |
|- |
||
| CD (3E-8%) |
|||
| <sup>224</sup>Ra |
|||
| <sup>208</sup>Pb, <sup>14</sup>C |
|||
| Thorium X |
|||
|- |
|||
| style="text-align:right" | 88 |
|||
| rowspan=2|<sup>223</sup>Ra |
|||
| style="text-align:right" | 136 |
|||
| rowspan=2|Actinium X |
|||
| 224.0202118(24) |
|||
| rowspan=2 style="text-align:right" | 88 |
|||
| 3.6319(23) d |
|||
| rowspan=2 style="text-align:right" | 135 |
|||
| 0+ |
|||
| rowspan=2|223.0185022(27) |
|||
| <ref group="n" name="ths">Occurs in trace quantities in nature as an intermediate decay product of <sup>232</sup>Th</ref> |
|||
| rowspan=2|11.43(5) d |
|||
| |
|||
| α |
|||
| <sup>219</sup>Rn |
|||
| rowspan=2|3/2+ |
|||
| rowspan=2|<ref group="n">Occurs in trace quantities in nature as an intermediate [[decay product]] of [[Uranium-235|<sup>235</sup>U]]</ref> |
|||
| rowspan=2| |
|||
|- |
|||
| CD (6.4E-8%) |
|||
| <sup>209</sup>Pb, <sup>14</sup>C |
|||
|- |
|||
| rowspan=2|<sup>224</sup>Ra |
|||
| rowspan=2|Thorium X |
|||
| rowspan=2 style="text-align:right" | 88 |
|||
| rowspan=2 style="text-align:right" | 136 |
|||
| rowspan=2|224.0202118(24) |
|||
| rowspan=2|3.6319(23) d |
|||
| α |
|||
| <sup>220</sup>Rn |
|||
| rowspan=2|0+ |
|||
| rowspan=2|<ref group="n" name="ths">Occurs in trace quantities in nature as an intermediate decay product of <sup>232</sup>Th</ref> |
|||
| rowspan=2| |
|||
|- |
|||
| CD (4.3E-9%) |
|||
| <sup>210</sup>Pb, <sup>14</sup>C |
|||
|- |
|- |
||
| <sup>225</sup>Ra |
| <sup>225</sup>Ra |
||
Line 339: | Line 475: | ||
| 225.023612(3) |
| 225.023612(3) |
||
| 14.9(2) d |
| 14.9(2) d |
||
| β<sup>-</sup> |
|||
| <sup>225</sup>Ac |
|||
| 1/2+ |
| 1/2+ |
||
| |
| |
||
| |
| |
||
|- |
|- |
||
| <sup>226</sup>Ra |
| rowspan=3|<sup>226</sup>Ra |
||
| Radium<ref group="n">Source of element's name</ref> |
| rowspan=3|Radium<ref group="n">Source of element's name</ref> |
||
| style="text-align:right" | 88 |
| rowspan=3 style="text-align:right" | 88 |
||
| style="text-align:right" | 138 |
| rowspan=3 style="text-align:right" | 138 |
||
| 226.0254098(25) |
| rowspan=3|226.0254098(25) |
||
| 1600(7) y |
| rowspan=3|1600(7) y |
||
| |
| α |
||
| <sup>222</sup>Rn |
|||
| <ref group="n">Trace quantities occur in nature as an intermediate decay product of [[Uranium-238|<sup>238</sup>U]]</ref> |
|||
| rowspan=3|0+ |
|||
| |
|||
| rowspan=3|<ref group="n">Trace quantities occur in nature as an intermediate decay product of [[Uranium-238|<sup>238</sup>U]]</ref> |
|||
| rowspan=3| |
|||
|- |
|||
| β<sup>-</sup>β<sup>-</sup> (rare) |
|||
| <sup>226</sup>Th |
|||
|- |
|||
| CD (2.6E-9%) |
|||
| <sup>212</sup>Pb, <sup>14</sup>C |
|||
|- |
|- |
||
| <sup>227</sup>Ra |
| <sup>227</sup>Ra |
||
Line 359: | Line 505: | ||
| 227.0291778(25) |
| 227.0291778(25) |
||
| 42.2(5) min |
| 42.2(5) min |
||
| β<sup>-</sup> |
|||
| <sup>227</sup>Ac |
|||
| 3/2+ |
| 3/2+ |
||
| |
| |
||
Line 369: | Line 517: | ||
| 228.0310703(26) |
| 228.0310703(26) |
||
| 5.75(3) y |
| 5.75(3) y |
||
| β<sup>-</sup> |
|||
| <sup>228</sup>Ac |
|||
| 0+ |
| 0+ |
||
| <ref group="n" name="ths" /> |
| <ref group="n" name="ths" /> |
||
Line 379: | Line 529: | ||
| 229.034958(20) |
| 229.034958(20) |
||
| 4.0(2) min |
| 4.0(2) min |
||
| β<sup>-</sup> |
|||
| <sup>229</sup>Ac |
|||
| 5/2(+) |
| 5/2(+) |
||
| |
| |
||
Line 389: | Line 541: | ||
| 230.037056(13) |
| 230.037056(13) |
||
| 93(2) min |
| 93(2) min |
||
| β<sup>-</sup> |
|||
| <sup>230</sup>Ac |
|||
| 0+ |
| 0+ |
||
| |
| |
||
Line 399: | Line 553: | ||
| 231.04122(32)# |
| 231.04122(32)# |
||
| 103(3) s |
| 103(3) s |
||
| β<sup>-</sup> |
|||
| <sup>231</sup>Ac |
|||
| (5/2+) |
| (5/2+) |
||
| |
| |
||
Line 407: | Line 563: | ||
| colspan="3" style="text-indent:2em" | 66.21(9) keV |
| colspan="3" style="text-indent:2em" | 66.21(9) keV |
||
| ~53 µs |
| ~53 µs |
||
| |
|||
| |
|||
| (1/2+) |
| (1/2+) |
||
| |
| |
||
Line 417: | Line 575: | ||
| 232.04364(30)# |
| 232.04364(30)# |
||
| 250(50) s |
| 250(50) s |
||
| β<sup>-</sup> |
|||
| <sup>232</sup>Ac |
|||
| 0+ |
| 0+ |
||
| |
| |
||
Line 427: | Line 587: | ||
| 233.04806(50)# |
| 233.04806(50)# |
||
| 30(5) s |
| 30(5) s |
||
| β<sup>-</sup> |
|||
| <sup>233</sup>Ac |
|||
| 1/2+# |
| 1/2+# |
||
| |
| |
||
Line 437: | Line 599: | ||
| 234.05070(53)# |
| 234.05070(53)# |
||
| 30(10) s |
| 30(10) s |
||
| β<sup>-</sup> |
|||
| <sup>234</sup>Ac |
|||
| 0+ |
| 0+ |
||
| |
| |
Revision as of 23:13, 16 May 2011
Radium (Ra) has no stable isotopes. A standard atomic mass cannot be given. The longest lived, and most common, isotope of radium is 226Ra with a half-life of 1600 years. 226Ra occurs in the disintegration chain of 238U (often referred to as the radium series.)
Table
nuclide symbol |
historic name |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s)[1][n 1] |
daughter isotope(s) |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
---|---|---|---|---|---|---|---|---|---|---|
excitation energy | ||||||||||
202Ra | 88 | 114 | 202.00989(7) | 2.6(21) ms [0.7(+33-3) ms] |
0+ | |||||
203Ra | 88 | 115 | 203.00927(9) | 4(3) ms | α | 199Rn | (3/2-) | |||
β+ (rare) | 203Fr | |||||||||
203mRa | 220(90) keV | 41(17) ms | α | 199Rn | (13/2+) | |||||
β+ (rare) | 203Fr | |||||||||
204Ra | 88 | 116 | 204.006500(17) | 60(11) ms [59(+12-9) ms] |
α (99.7%) | 200Rn | 0+ | |||
β+ (.3%) | 204Fr | |||||||||
205Ra | 88 | 117 | 205.00627(9) | 220(40) ms [210(+60-40) ms] |
α | 201Rn | (3/2-) | |||
β+ (rare) | 205Fr | |||||||||
style="text-indent:1em" | 205mRa | 310(110)# keV | 180(50) ms [170(+60-40) ms] |
α | 201Rn | (13/2+) | |||||
IT (rare) | 205Ra | |||||||||
206Ra | 88 | 118 | 206.003827(19) | 0.24(2) s | α | 202Rn | 0+ | |||
207Ra | 88 | 119 | 207.00380(6) | 1.3(2) s | α (90%) | 203Rn | (5/2-,3/2-) | |||
β+ (10%) | 207Fr | |||||||||
207mRa | 560(50) keV | 57(8) ms | IT (85%) | 207Ra | (13/2+) | |||||
α (15%) | 203Rn | |||||||||
β+ (.55%) | 207Fr | |||||||||
208Ra | 88 | 120 | 208.001840(17) | 1.3(2) s | α (95%) | 204Rn | 0+ | |||
β+ (5%) | 208Fr | |||||||||
208mRa | 1800(200) keV | 270 ns | (8+) | |||||||
209Ra | 88 | 121 | 209.00199(5) | 4.6(2) s | α (90%) | 205Rn | 5/2- | |||
β+ (10%) | 209Fr | |||||||||
210Ra | 88 | 122 | 210.000495(16) | 3.7(2) s | α (96%) | 206Rn | 0+ | |||
β+ (4%) | 210Fr | |||||||||
210mRa | 1800(200) keV | 2.24 µs | (8+) | |||||||
211Ra | 88 | 123 | 211.000898(28) | 13(2) s | α (97%) | 207Rn | 5/2(-) | |||
β+ (3%) | 207Fr | |||||||||
212Ra | 88 | 124 | 211.999794(12) | 13.0(2) s | α (85%) | 208Rn | 0+ | |||
β+ (15%) | 212Fr | |||||||||
212m1Ra | 1958.4(5) keV | 10.9(4) µs | (8)+ | |||||||
212m2Ra | 2613.4(5) keV | 0.85(13) µs | (11)- | |||||||
213Ra | 88 | 125 | 213.000384(22) | 2.74(6) min | α (80%) | 209Rn | 1/2- | |||
β+ (20%) | 213Fr | |||||||||
213mRa | 1769(6) keV | 2.1(1) ms | IT (99%) | 213Ra | 17/2-# | |||||
α (1%) | 209Rn | |||||||||
214Ra | 88 | 126 | 214.000108(10) | 2.46(3) s | α (99.94%) | 210Rn | 0+ | |||
β+ (.06%) | 214Fr | |||||||||
215Ra | 88 | 127 | 215.002720(8) | 1.55(7) ms | α | 211Rn | (9/2+)# | |||
215m1Ra | 1877.8(5) keV | 7.1(2) µs | (25/2+) | |||||||
215m2Ra | 2246.9(5) keV | 1.39(7) µs | (29/2-) | |||||||
215m3Ra | 3756.6(6)+X keV | 0.555(10) µs | (43/2-) | |||||||
216Ra | 88 | 128 | 216.003533(9) | 182(10) ns | α | 212Rn | 0+ | |||
EC (1E-8%) | 216Fr | |||||||||
217Ra | 88 | 129 | 217.006320(9) | 1.63(17) µs | α | 213Rn | (9/2+) | |||
218Ra | 88 | 130 | 218.007140(12) | 25.2(3) µs | α | 214Rn | 0+ | |||
β+β+ (rare) | 218Rn | |||||||||
219Ra | 88 | 131 | 219.010085(9) | 10(3) ms | α | 215Rn | (7/2)+ | |||
220Ra | 88 | 132 | 220.011028(10) | 17.9(14) ms | α | 216Rn | 0+ | |||
221Ra | 88 | 133 | 221.013917(5) | 28(2) s | α | 217Rn | 5/2+ | |||
CD (1.2E-10%) | 207Pb, 14C | |||||||||
222Ra | 88 | 134 | 222.015375(5) | 38.0(5) s | α | 218Rn | 0+ | |||
CD (3E-8%) | 208Pb, 14C | |||||||||
223Ra | Actinium X | 88 | 135 | 223.0185022(27) | 11.43(5) d | α | 219Rn | 3/2+ | [n 2] | |
CD (6.4E-8%) | 209Pb, 14C | |||||||||
224Ra | Thorium X | 88 | 136 | 224.0202118(24) | 3.6319(23) d | α | 220Rn | 0+ | [n 3] | |
CD (4.3E-9%) | 210Pb, 14C | |||||||||
225Ra | 88 | 137 | 225.023612(3) | 14.9(2) d | β- | 225Ac | 1/2+ | |||
226Ra | Radium[n 4] | 88 | 138 | 226.0254098(25) | 1600(7) y | α | 222Rn | 0+ | [n 5] | |
β-β- (rare) | 226Th | |||||||||
CD (2.6E-9%) | 212Pb, 14C | |||||||||
227Ra | 88 | 139 | 227.0291778(25) | 42.2(5) min | β- | 227Ac | 3/2+ | |||
228Ra | Mesothorium 1 | 88 | 140 | 228.0310703(26) | 5.75(3) y | β- | 228Ac | 0+ | [n 3] | |
229Ra | 88 | 141 | 229.034958(20) | 4.0(2) min | β- | 229Ac | 5/2(+) | |||
230Ra | 88 | 142 | 230.037056(13) | 93(2) min | β- | 230Ac | 0+ | |||
231Ra | 88 | 143 | 231.04122(32)# | 103(3) s | β- | 231Ac | (5/2+) | |||
231mRa | 66.21(9) keV | ~53 µs | (1/2+) | |||||||
232Ra | 88 | 144 | 232.04364(30)# | 250(50) s | β- | 232Ac | 0+ | |||
233Ra | 88 | 145 | 233.04806(50)# | 30(5) s | β- | 233Ac | 1/2+# | |||
234Ra | 88 | 146 | 234.05070(53)# | 30(10) s | β- | 234Ac | 0+ |
- ^ Abbreviations:
CD: Cluster decay
EC: Electron capture
IT: Isomeric transition - ^ Occurs in trace quantities in nature as an intermediate decay product of 235U
- ^ a b Occurs in trace quantities in nature as an intermediate decay product of 232Th
- ^ Source of element's name
- ^ Trace quantities occur in nature as an intermediate decay product of 238U
Notes
- Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
- Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.
References
- Isotope masses from:
- G. Audi, A. H. Wapstra, C. Thibault, J. Blachot and O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. doi:10.1016/j.nuclphysa.2003.11.001.
{{cite journal}}
: CS1 maint: multiple names: authors list (link)
- G. Audi, A. H. Wapstra, C. Thibault, J. Blachot and O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. doi:10.1016/j.nuclphysa.2003.11.001.
- Isotopic compositions and standard atomic masses from:
- J. R. de Laeter, J. K. Böhlke, P. De Bièvre, H. Hidaka, H. S. Peiser, K. J. R. Rosman and P. D. P. Taylor (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683.
{{cite journal}}
: CS1 maint: multiple names: authors list (link) - M. E. Wieser (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry. 78 (11): 2051–2066. doi:10.1351/pac200678112051.
{{cite journal}}
: Unknown parameter|laysummary=
ignored (help)
- J. R. de Laeter, J. K. Böhlke, P. De Bièvre, H. Hidaka, H. S. Peiser, K. J. R. Rosman and P. D. P. Taylor (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683.
- Half-life, spin, and isomer data selected from the following sources. See editing notes on this article's talk page.
- G. Audi, A. H. Wapstra, C. Thibault, J. Blachot and O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. doi:10.1016/j.nuclphysa.2003.11.001.
{{cite journal}}
: CS1 maint: multiple names: authors list (link) - National Nuclear Data Center. "NuDat 2.1 database". Brookhaven National Laboratory. Retrieved September 2005.
{{cite web}}
: Check date values in:|accessdate=
(help) - N. E. Holden (2004). "Table of the Isotopes". In D. R. Lide (ed.). CRC Handbook of Chemistry and Physics (85th ed.). CRC Press. Section 11. ISBN 978-0849304859.
{{cite book}}
: Unknown parameter|nopp=
ignored (|no-pp=
suggested) (help)
- G. Audi, A. H. Wapstra, C. Thibault, J. Blachot and O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. doi:10.1016/j.nuclphysa.2003.11.001.