Isotopes of francium: Difference between revisions
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! <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>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 23: | Line 25: | ||
| 199.00726(4) |
| 199.00726(4) |
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| 16(7) ms |
| 16(7) ms |
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| |
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| 1/2+# |
| 1/2+# |
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Line 33: | Line 37: | ||
| 200.00657(8) |
| 200.00657(8) |
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| 24(10) ms |
| 24(10) ms |
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| [[alpha decay|α]] |
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| <sup>196</sup>At |
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| 3+# |
| 3+# |
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| |
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| |
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|- |
|- |
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| style="text-indent:1em" | <sup>200m</sup>Fr |
| rowspan=2 style="text-indent:1em" | <sup>200m</sup>Fr |
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| rowspan=2| |
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| |
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| colspan="3" style="text-indent:2em" | 60(110) keV |
| rowspan=2 colspan="3" style="text-indent:2em" | 60(110) keV |
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| 650(210) ms |
| rowspan=2|650(210) ms |
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| |
| α |
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| <sup>196</sup>At |
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| rowspan=2|10-# |
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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>201</sup>Fr |
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| <sup>200</sup>Fr |
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| |
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| style="text-align:right" | 87 |
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| style="text-align:right" | 114 |
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| 201.00386(8) |
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| 67(3) ms |
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| (9/2-) |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>201</sup>Fr |
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| rowspan=2| |
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| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 114 |
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| rowspan=2|201.00386(8) |
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| rowspan=2|67(3) ms |
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| ( |
| α (99%) |
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| <sup>197</sup>At |
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| rowspan=2|(9/2-) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| |
| β<sup>+</sup> (1%) |
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| <sup>201</sup>Rn |
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| colspan="3" style="text-indent:2em" | 330(90)# keV |
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| 340(40) ms |
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| (10-) |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>202</sup>Fr |
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| rowspan=2| |
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| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 115 |
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| rowspan=2|202.00337(5) |
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| 203.000925(17) |
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| rowspan=2|290(30) ms |
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| ( |
| α (97%) |
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| <sup>198</sup>At |
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| rowspan=2|(3+) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| <sup> |
| β<sup>+</sup> (3%) |
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| <sup>202</sup>Rn |
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| style="text-align:right" | 87 |
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| style="text-align:right" | 117 |
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| 204.000653(26) |
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| 1.7(3) s |
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| (3+) |
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|- |
|- |
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| style="text-indent:1em" | <sup> |
| rowspan=2 style="text-indent:1em" | <sup>202m</sup>Fr |
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| rowspan=2| |
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| colspan="3" style="text-indent:2em" | |
| rowspan=2 colspan="3" style="text-indent:2em" | 330(90)# keV |
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| 2 |
| rowspan=2|340(40) ms |
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| ( |
| α (97%) |
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| <sup>198</sup>At |
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| rowspan=2|(10-) |
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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>202</sup>Rn |
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|- |
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| rowspan=2|<sup>203</sup>Fr |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 87 |
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| rowspan=2 style="text-align:right" | 116 |
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| rowspan=2|203.000925(17) |
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| rowspan=2|0.55(2) s |
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| α (95%) |
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| <sup>199</sup>At |
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| rowspan=2|(9/2-)# |
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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>203</sup>Rn |
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|- |
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| rowspan=2|<sup>204</sup>Fr |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 87 |
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| rowspan=2 style="text-align:right" | 117 |
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| rowspan=2|204.000653(26) |
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| rowspan=2|1.7(3) s |
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| α (96%) |
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| <sup>200</sup>At |
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| rowspan=2|(3+) |
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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>204</sup>Rn |
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|- |
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| rowspan=2 style="text-indent:1em" | <sup>204m1</sup>Fr |
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| rowspan=2| |
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| rowspan=2 colspan="3" style="text-indent:2em" | 50(4) keV |
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| rowspan=2|2.6(3) s |
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| α (90%) |
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| <sup>200</sup>At |
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| rowspan=2|(7+) |
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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>204</sup>Rn |
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|- |
|- |
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| style="text-indent:1em" | <sup>204m2</sup>Fr |
| style="text-indent:1em" | <sup>204m2</sup>Fr |
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| |
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| colspan="3" style="text-indent:2em" | 326(4) keV |
| colspan="3" style="text-indent:2em" | 326(4) keV |
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| 1.7(6) s |
| 1.7(6) s |
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| (10-) |
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| (10-) |
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|- |
|- |
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| <sup>205</sup>Fr |
| rowspan=2|<sup>205</sup>Fr |
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| rowspan=2| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | 118 |
| rowspan=2 style="text-align:right" | 118 |
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| 204.998594(8) |
| rowspan=2|204.998594(8) |
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| 3.80(3) s |
| rowspan=2|3.80(3) s |
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| ( |
| α (99%) |
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| <sup>201</sup>At |
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| rowspan=2|(9/2-) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| <sup> |
| β<sup>+</sup> (1%) |
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| <sup>205</sup>Rn |
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|- |
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| style="text-align:right" | 87 |
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| rowspan=2|<sup>206</sup>Fr |
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| style="text-align:right" | 119 |
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| rowspan=2| |
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| 205.99867(3) |
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| rowspan=2 style="text-align:right" | 87 |
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| ~16 s |
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| rowspan=2 style="text-align:right" | 119 |
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| (2+,3+) |
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| rowspan=2|205.99867(3) |
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| rowspan=2|~16 s |
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| β<sup>+</sup> (58%) |
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| <sup>206</sup>Rn |
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| rowspan=2|(2+,3+) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| α (42%) |
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| <sup>202</sup>At |
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|- |
|- |
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| style="text-indent:1em" | <sup>206m1</sup>Fr |
| style="text-indent:1em" | <sup>206m1</sup>Fr |
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| colspan="3" style="text-indent:2em" | 190(40) keV |
| colspan="3" style="text-indent:2em" | 190(40) keV |
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| 15.9(1) s |
| 15.9(1) s |
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| (7+) |
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| (7+) |
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| style="text-indent:1em" | <sup>206m2</sup>Fr |
| style="text-indent:1em" | <sup>206m2</sup>Fr |
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Line 141: | Line 196: | ||
| colspan="3" style="text-indent:2em" | 730(40) keV |
| colspan="3" style="text-indent:2em" | 730(40) keV |
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| 700(100) ms |
| 700(100) ms |
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| (10-) |
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| |
| |
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|- |
| (10-) |
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| <sup>207</sup>Fr |
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| |
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| style="text-align:right" | 87 |
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| style="text-align:right" | 120 |
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| 206.99695(5) |
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| 14.8(1) s |
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| 9/2- |
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| |
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| |
| |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>207</sup>Fr |
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| rowspan=2| |
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| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 120 |
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| |
| rowspan=2|206.99695(5) |
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| rowspan=2|14.8(1) s |
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| α (95%) |
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| 7+ |
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| <sup>203</sup>At |
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| rowspan=2|9/2- |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| <sup> |
| β<sup>+</sup> (5%) |
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| <sup>207</sup>Rn |
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| style="text-align:right" | 87 |
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| style="text-align:right" | 122 |
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| 208.995954(16) |
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| 50.0(3) s |
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| 9/2- |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>208</sup>Fr |
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| rowspan=2| |
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| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 121 |
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| rowspan=2|207.99714(5) |
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| 209.996408(24) |
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| rowspan=2|59.1(3) s |
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| α (90%) |
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| 6+ |
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| <sup>204</sup>At |
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| rowspan=2|7+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| <sup> |
| β<sup>+</sup> (10%) |
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| <sup>208</sup>Rn |
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| style="text-align:right" | 87 |
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| style="text-align:right" | 124 |
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| 210.995537(23) |
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| 3.10(2) min |
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| 9/2- |
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|- |
|- |
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| <sup> |
| rowspan=2|<sup>209</sup>Fr |
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| rowspan=2| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | |
| rowspan=2 style="text-align:right" | 122 |
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| rowspan=2|208.995954(16) |
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| 211.996202(28) |
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| rowspan=2|50.0(3) s |
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| α (89%) |
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| 5+ |
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| <sup>205</sup>At |
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| rowspan=2|9/2- |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (11%) |
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| <sup>209</sup>Rn |
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|- |
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| rowspan=2|<sup>210</sup>Fr |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 87 |
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| rowspan=2 style="text-align:right" | 123 |
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| rowspan=2|209.996408(24) |
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| rowspan=2|3.18(6) min |
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| α (60%) |
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| <sup>206</sup>At |
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| rowspan=2|6+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
|- |
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| <sup> |
| β<sup>+</sup> (40%) |
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| <sup>210</sup>Rn |
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|- |
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| style="text-align:right" | 87 |
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| rowspan=2|<sup>211</sup>Fr |
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| style="text-align:right" | 126 |
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| rowspan=2| |
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| 212.996189(8) |
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| rowspan=2 style="text-align:right" | 87 |
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| 34.6(3) s |
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| rowspan=2 style="text-align:right" | 124 |
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| 9/2- |
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| rowspan=2|210.995537(23) |
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| rowspan=2|3.10(2) min |
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| α (80%) |
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| <sup>207</sup>At |
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| rowspan=2|9/2- |
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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>211</sup>Rn |
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|- |
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| rowspan=2|<sup>212</sup>Fr |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 87 |
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| rowspan=2 style="text-align:right" | 125 |
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| rowspan=2|211.996202(28) |
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| rowspan=2|20.0(6) min |
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| β<sup>+</sup> (57%) |
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| <sup>212</sup>Rn |
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| rowspan=2|5+ |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| α (43%) |
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| <sup>208</sup>At |
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|- |
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| rowspan=2|<sup>213</sup>Fr |
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| rowspan=2| |
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| rowspan=2 style="text-align:right" | 87 |
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| rowspan=2 style="text-align:right" | 126 |
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| rowspan=2|212.996189(8) |
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| rowspan=2|34.6(3) s |
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| α (99.45%) |
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| <sup>209</sup>At |
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| rowspan=2|9/2- |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (.55%) |
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| <sup>213</sup>Rn |
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|- |
|- |
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| <sup>214</sup>Fr |
| <sup>214</sup>Fr |
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Line 221: | Line 313: | ||
| 213.998971(9) |
| 213.998971(9) |
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| 5.0(2) ms |
| 5.0(2) ms |
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| α |
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| <sup>210</sup>At |
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| (1-) |
| (1-) |
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| |
| |
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Line 229: | Line 323: | ||
| colspan="3" style="text-indent:2em" | 123(6) keV |
| colspan="3" style="text-indent:2em" | 123(6) keV |
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| 3.35(5) ms |
| 3.35(5) ms |
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| α |
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| <sup>210</sup>At |
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| (8-) |
| (8-) |
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| |
| |
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Line 237: | Line 333: | ||
| colspan="3" style="text-indent:2em" | 638(6) keV |
| colspan="3" style="text-indent:2em" | 638(6) keV |
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| 103(4) ns |
| 103(4) ns |
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| |
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| (11+) |
| (11+) |
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| |
| |
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Line 245: | Line 343: | ||
| colspan="3" style="text-indent:2em" | 6477+Y keV |
| colspan="3" style="text-indent:2em" | 6477+Y keV |
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| 108(7) ns |
| 108(7) ns |
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| |
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| (33+) |
| (33+) |
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| |
| |
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Line 255: | Line 355: | ||
| 215.000341(8) |
| 215.000341(8) |
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| 86(5) ns |
| 86(5) ns |
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| α |
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| <sup>211</sup>At |
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| 9/2- |
| 9/2- |
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| |
| |
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|- |
|- |
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| <sup>216</sup>Fr |
| rowspan=2|<sup>216</sup>Fr |
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| rowspan=2| |
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| |
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| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
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| style="text-align:right" | 129 |
| rowspan=2 style="text-align:right" | 129 |
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| 216.003198(15) |
| rowspan=2|216.003198(15) |
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| 0.70(2) µs |
| rowspan=2|0.70(2) µs |
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| |
| α |
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| <sup>212</sup>At |
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| rowspan=2|(1-) |
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| rowspan=2| |
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| rowspan=2| |
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|- |
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| β<sup>+</sup> (2E-7%) |
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| <sup>216</sup>Rn |
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|- |
|- |
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| <sup>217</sup>Fr |
| <sup>217</sup>Fr |
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Line 275: | Line 382: | ||
| 217.004632(7) |
| 217.004632(7) |
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| 16.8(19) µs |
| 16.8(19) µs |
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| α |
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| <sup>213</sup>At |
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| 9/2- |
| 9/2- |
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| |
| |
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Line 285: | Line 394: | ||
| 218.007578(5) |
| 218.007578(5) |
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| 1.0(6) ms |
| 1.0(6) ms |
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| α |
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| <sup>214</sup>At |
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| 1- |
| 1- |
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| |
| |
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| |
| |
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|- |
|- |
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| style="text-indent:1em" | <sup>218m1</sup>Fr |
| rowspan=2 style="text-indent:1em" | <sup>218m1</sup>Fr |
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| rowspan=2| |
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| |
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| colspan="3" style="text-indent:2em" | 86(4) keV |
| rowspan=2 colspan="3" style="text-indent:2em" | 86(4) keV |
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| 22.0(5) ms |
| rowspan=2|22.0(5) ms |
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| |
| α |
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| <sup>214</sup>At |
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| |
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| rowspan=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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| IT (rare) |
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| <sup>218</sup>Fr |
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|- |
|- |
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| style="text-indent:1em" | <sup>218m2</sup>Fr |
| style="text-indent:1em" | <sup>218m2</sup>Fr |
||
| |
| |
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| colspan="3" style="text-indent:2em" | 200(150)# keV |
| colspan="3" style="text-indent:2em" | 200(150)# keV |
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| |
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| |
| |
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| high |
| high |
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Line 311: | Line 429: | ||
| 219.009252(8) |
| 219.009252(8) |
||
| 20(2) ms |
| 20(2) ms |
||
| α |
|||
| <sup>215</sup>At |
|||
| 9/2- |
| 9/2- |
||
| |
| |
||
| |
| |
||
|- |
|- |
||
| <sup>220</sup>Fr |
| rowspan=2|<sup>220</sup>Fr |
||
| rowspan=2| |
|||
| |
|||
| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
||
| style="text-align:right" | 133 |
| rowspan=2 style="text-align:right" | 133 |
||
| 220.012327(4) |
| rowspan=2|220.012327(4) |
||
| 27.4(3) s |
| rowspan=2|27.4(3) s |
||
| α (99.65%) |
|||
| 1+ |
|||
| <sup>216</sup>At |
|||
| |
|||
| rowspan=2|1+ |
|||
| |
|||
| rowspan=2| |
|||
| rowspan=2| |
|||
|- |
|- |
||
| <sup> |
| β<sup>-</sup> (.35%) |
||
| <sup>220</sup>Ra |
|||
| |
|||
|- |
|||
| style="text-align:right" | 87 |
|||
| rowspan=3|<sup>221</sup>Fr |
|||
| style="text-align:right" | 134 |
|||
| rowspan=3| |
|||
| 221.014255(5) |
|||
| rowspan=3 style="text-align:right" | 87 |
|||
| 4.9(2) min |
|||
| rowspan=3 style="text-align:right" | 134 |
|||
| 5/2- |
|||
| rowspan=3|221.014255(5) |
|||
| |
|||
| rowspan=3|4.9(2) min |
|||
| |
|||
| α (99.9%) |
|||
| <sup>217</sup>At |
|||
| rowspan=3|5/2- |
|||
| rowspan=3| |
|||
| rowspan=3| |
|||
|- |
|||
| β<sup>-</sup> (.1%) |
|||
| <sup>221</sup>Ra |
|||
|- |
|||
| [[Cluster decay|CD]] (8.79E-11%) |
|||
| <sup>207</sup>Tl, [[Carbon-14|<sup>14</sup>C]] |
|||
|- |
|- |
||
| <sup>222</sup>Fr |
| <sup>222</sup>Fr |
||
Line 341: | Line 474: | ||
| 222.017552(23) |
| 222.017552(23) |
||
| 14.2(3) min |
| 14.2(3) min |
||
| β<sup>-</sup> |
|||
| <sup>222</sup>Ra |
|||
| 2- |
| 2- |
||
| |
| |
||
| |
| |
||
|- |
|- |
||
| <sup>223</sup>Fr |
| rowspan=2|<sup>223</sup>Fr |
||
| Actinium K |
| rowspan=2|Actinium K |
||
| style="text-align:right" | 87 |
| rowspan=2 style="text-align:right" | 87 |
||
| style="text-align:right" | 136 |
| rowspan=2 style="text-align:right" | 136 |
||
| 223.0197359(26) |
| rowspan=2|223.0197359(26) |
||
| 22.00(7) min |
| rowspan=2|22.00(7) min |
||
| β<sup>-</sup> (99.99%) |
|||
| 3/2(-) |
|||
| <sup>223</sup>Ra |
|||
| <ref group="n">Occurs in trace quantities in nature as an intermediate [[decay product]] of [[Uranium-235|<sup>235</sup>U]]</ref> |
|||
| 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| |
|||
|- |
|||
| α (.006%) |
|||
| <sup>219</sup>At |
|||
|- |
|- |
||
| <sup>224</sup>Fr |
| <sup>224</sup>Fr |
||
Line 361: | Line 501: | ||
| 224.02325(5) |
| 224.02325(5) |
||
| 3.33(10) min |
| 3.33(10) min |
||
| β<sup>-</sup> |
|||
| <sup>2214</sup>Ra |
|||
| 1- |
| 1- |
||
| |
| |
||
Line 371: | Line 513: | ||
| 225.02557(3) |
| 225.02557(3) |
||
| 4.0(2) min |
| 4.0(2) min |
||
| β<sup>-</sup> |
|||
| <sup>225</sup>Ra |
|||
| 3/2- |
| 3/2- |
||
| |
| |
||
Line 381: | Line 525: | ||
| 226.02939(11) |
| 226.02939(11) |
||
| 49(1) s |
| 49(1) s |
||
| β<sup>-</sup> |
|||
| <sup>226</sup>Ra |
|||
| 1- |
| 1- |
||
| |
| |
||
Line 391: | Line 537: | ||
| 227.03184(11) |
| 227.03184(11) |
||
| 2.47(3) min |
| 2.47(3) min |
||
| β<sup>-</sup> |
|||
| <sup>227</sup>Ra |
|||
| 1/2+ |
| 1/2+ |
||
| |
| |
||
Line 401: | Line 549: | ||
| 228.03573(22)# |
| 228.03573(22)# |
||
| 38(1) s |
| 38(1) s |
||
| β<sup>-</sup> |
|||
| <sup>228</sup>Ra |
|||
| 2- |
| 2- |
||
| |
| |
||
Line 411: | Line 561: | ||
| 229.03845(4) |
| 229.03845(4) |
||
| 50.2(4) s |
| 50.2(4) s |
||
| β<sup>-</sup> |
|||
| <sup>229</sup>Ra |
|||
| (1/2+)# |
| (1/2+)# |
||
| |
| |
||
Line 421: | Line 573: | ||
| 230.04251(48)# |
| 230.04251(48)# |
||
| 19.1(5) s |
| 19.1(5) s |
||
| β<sup>-</sup> |
|||
| <sup>230</sup>Ra |
|||
| |
| |
||
| |
| |
||
Line 431: | Line 585: | ||
| 231.04544(50)# |
| 231.04544(50)# |
||
| 17.6(6) s |
| 17.6(6) s |
||
| β<sup>-</sup> |
|||
| <sup>231</sup>Ra |
|||
| (1/2+)# |
| (1/2+)# |
||
| |
| |
||
Line 441: | Line 597: | ||
| 232.04977(69)# |
| 232.04977(69)# |
||
| 5(1) s |
| 5(1) s |
||
| β<sup>-</sup> |
|||
| <sup>232</sup>Ra |
|||
| |
| |
||
| |
| |
Revision as of 02:03, 16 May 2011
Francium (Fr) has no stable isotopes. A standard atomic mass cannot be given. Its most stable isotope is 223Fr with a half-life of 22 minutes, which is also the only naturally-occurring isotope, occurring in trace quantities as an intermediate decay product of 235U.
Of elements whose most stable isotopes have been identified with certainty, Francium is the most unstable. All elements with atomic number of greater than or equal to 106 (Seaborgium) have most-stable-known isotopes shorter than that of Francium, but those elements have only a relatively small number of isotopes discovered, thus, there is the possibility of a yet-unknown isotope having a logner half-life.
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 | ||||||||||
199Fr | 87 | 112 | 199.00726(4) | 16(7) ms | 1/2+# | |||||
200Fr | 87 | 113 | 200.00657(8) | 24(10) ms | α | 196At | 3+# | |||
200mFr | 60(110) keV | 650(210) ms | α | 196At | 10-# | |||||
IT (rare) | 200Fr | |||||||||
201Fr | 87 | 114 | 201.00386(8) | 67(3) ms | α (99%) | 197At | (9/2-) | |||
β+ (1%) | 201Rn | |||||||||
202Fr | 87 | 115 | 202.00337(5) | 290(30) ms | α (97%) | 198At | (3+) | |||
β+ (3%) | 202Rn | |||||||||
202mFr | 330(90)# keV | 340(40) ms | α (97%) | 198At | (10-) | |||||
β+ (3%) | 202Rn | |||||||||
203Fr | 87 | 116 | 203.000925(17) | 0.55(2) s | α (95%) | 199At | (9/2-)# | |||
β+ (5%) | 203Rn | |||||||||
204Fr | 87 | 117 | 204.000653(26) | 1.7(3) s | α (96%) | 200At | (3+) | |||
β+ (4%) | 204Rn | |||||||||
204m1Fr | 50(4) keV | 2.6(3) s | α (90%) | 200At | (7+) | |||||
β+ (10%) | 204Rn | |||||||||
204m2Fr | 326(4) keV | 1.7(6) s | (10-) | |||||||
205Fr | 87 | 118 | 204.998594(8) | 3.80(3) s | α (99%) | 201At | (9/2-) | |||
β+ (1%) | 205Rn | |||||||||
206Fr | 87 | 119 | 205.99867(3) | ~16 s | β+ (58%) | 206Rn | (2+,3+) | |||
α (42%) | 202At | |||||||||
206m1Fr | 190(40) keV | 15.9(1) s | (7+) | |||||||
206m2Fr | 730(40) keV | 700(100) ms | (10-) | |||||||
207Fr | 87 | 120 | 206.99695(5) | 14.8(1) s | α (95%) | 203At | 9/2- | |||
β+ (5%) | 207Rn | |||||||||
208Fr | 87 | 121 | 207.99714(5) | 59.1(3) s | α (90%) | 204At | 7+ | |||
β+ (10%) | 208Rn | |||||||||
209Fr | 87 | 122 | 208.995954(16) | 50.0(3) s | α (89%) | 205At | 9/2- | |||
β+ (11%) | 209Rn | |||||||||
210Fr | 87 | 123 | 209.996408(24) | 3.18(6) min | α (60%) | 206At | 6+ | |||
β+ (40%) | 210Rn | |||||||||
211Fr | 87 | 124 | 210.995537(23) | 3.10(2) min | α (80%) | 207At | 9/2- | |||
β+ (20%) | 211Rn | |||||||||
212Fr | 87 | 125 | 211.996202(28) | 20.0(6) min | β+ (57%) | 212Rn | 5+ | |||
α (43%) | 208At | |||||||||
213Fr | 87 | 126 | 212.996189(8) | 34.6(3) s | α (99.45%) | 209At | 9/2- | |||
β+ (.55%) | 213Rn | |||||||||
214Fr | 87 | 127 | 213.998971(9) | 5.0(2) ms | α | 210At | (1-) | |||
214m1Fr | 123(6) keV | 3.35(5) ms | α | 210At | (8-) | |||||
214m2Fr | 638(6) keV | 103(4) ns | (11+) | |||||||
214m3Fr | 6477+Y keV | 108(7) ns | (33+) | |||||||
215Fr | 87 | 128 | 215.000341(8) | 86(5) ns | α | 211At | 9/2- | |||
216Fr | 87 | 129 | 216.003198(15) | 0.70(2) µs | α | 212At | (1-) | |||
β+ (2E-7%) | 216Rn | |||||||||
217Fr | 87 | 130 | 217.004632(7) | 16.8(19) µs | α | 213At | 9/2- | |||
218Fr | 87 | 131 | 218.007578(5) | 1.0(6) ms | α | 214At | 1- | |||
218m1Fr | 86(4) keV | 22.0(5) ms | α | 214At | ||||||
IT (rare) | 218Fr | |||||||||
218m2Fr | 200(150)# keV | high | ||||||||
219Fr | 87 | 132 | 219.009252(8) | 20(2) ms | α | 215At | 9/2- | |||
220Fr | 87 | 133 | 220.012327(4) | 27.4(3) s | α (99.65%) | 216At | 1+ | |||
β- (.35%) | 220Ra | |||||||||
221Fr | 87 | 134 | 221.014255(5) | 4.9(2) min | α (99.9%) | 217At | 5/2- | |||
β- (.1%) | 221Ra | |||||||||
CD (8.79E-11%) | 207Tl, 14C | |||||||||
222Fr | 87 | 135 | 222.017552(23) | 14.2(3) min | β- | 222Ra | 2- | |||
223Fr | Actinium K | 87 | 136 | 223.0197359(26) | 22.00(7) min | β- (99.99%) | 223Ra | 3/2(-) | [n 2] | |
α (.006%) | 219At | |||||||||
224Fr | 87 | 137 | 224.02325(5) | 3.33(10) min | β- | 2214Ra | 1- | |||
225Fr | 87 | 138 | 225.02557(3) | 4.0(2) min | β- | 225Ra | 3/2- | |||
226Fr | 87 | 139 | 226.02939(11) | 49(1) s | β- | 226Ra | 1- | |||
227Fr | 87 | 140 | 227.03184(11) | 2.47(3) min | β- | 227Ra | 1/2+ | |||
228Fr | 87 | 141 | 228.03573(22)# | 38(1) s | β- | 228Ra | 2- | |||
229Fr | 87 | 142 | 229.03845(4) | 50.2(4) s | β- | 229Ra | (1/2+)# | |||
230Fr | 87 | 143 | 230.04251(48)# | 19.1(5) s | β- | 230Ra | ||||
231Fr | 87 | 144 | 231.04544(50)# | 17.6(6) s | β- | 231Ra | (1/2+)# | |||
232Fr | 87 | 145 | 232.04977(69)# | 5(1) s | β- | 232Ra |
- ^ Abbreviations:
CD: Cluster decay
IT: Isomeric transition - ^ Occurs in trace quantities in nature as an intermediate decay product of 235U
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.