Talk:Isotopes of thorium

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This article is part of Wikipedia:Wikiproject Isotopes. Please keep style and phrasings consistent across the set of pages. For later reference and improved reliability, data from all considered multiple sources is collected here. References are denoted by these letters:

  • (A) G. Audi, O. Bersillon, J. Blachot, A.H. Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003). — Where this source indicates a speculative value, the # mark is also applied to values with weak assignment arguments from other sources, if grouped together. An asterisk after the A means that a comment of some importance may be available in the original.
  • (B) National Nuclear Data Center, Brookhaven National Laboratory, information extracted from the NuDat 2.1 database. (Retrieved Sept. 2005, from the code of the popup boxes).
  • (C) David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes. — The CRC uses rounded numbers with implied uncertainties, where this concurs with the range of another source it is treated as exactly equal in this comparison.
  • (D) More specific level data from reference B's Levels and Gammas database.
  • (E) Same as B but excitation energy replaced with that from D.
  Z   N refs symbol   half-life                   spin              excitation energy
 90 119 A   |Th-209  |7(5) ms                    |5/2-#
 90 119 B   |Th-209  |3.8(+69-15) ms             |(5/2-)
 90 119 C   |Th-209  |~0.01 s                    |
 90 120 A   |Th-210  |17(11) ms                  |0+
 90 120 B   |Th-210  |9(+17-4) ms                |0+
 90 120 C   |Th-210  |~12 ms                     |
 90 121 A   |Th-211  |48(20) ms                  |5/2-#
 90 121 BC  |Th-211  |0.04(+3-1) s               |
 90 122 A   |Th-212  |36(15) ms                  |0+
 90 122 B   |Th-212  |30(+20-10) ms              |0+
 90 122 C   |Th-212  |~30. ms                    |0+
 90 123 A   |Th-213  |140(25) ms                 |5/2-#
 90 123 BC  |Th-213  |140(25) ms                 |
 90 124 AB  |Th-214  |100(25) ms                 |0+
 90 124 C   |Th-214  |0.09 s                     |0+
 90 125 ABC |Th-215  |1.2(2) s                   |(1/2-)
 90 126 A   |Th-216  |26.8(3) ms                 |0+
 90 126 BC  |Th-216  |0.028(2) s                 |0+
 90 126 A   |Th-216m1|137(4) µs                  |(8+)             |2042(13) keV
 90 126 D   |Th-216m1|180(40) µs                 |(8+)             |2028(22) keV
 90 126 C   |Th-216m1|0.14 ms                    |
 90 126 A   |Th-216m2|615(55) ns                 |(11-)            |2637(20) keV
 90 127 A   |Th-217  |240(5) µs                  |(9/2+)
 90 127 B   |Th-217  |0.241(5) ms                |(9/2+)
 90 127 C   |Th-217  |0.25 ms                    |
 90 128 AB  |Th-218  |109(13) ns                 |0+
 90 128 C   |Th-218  |0.11 µs                    |0+
 90 129 A   |Th-219  |1.05(3) µs                 |9/2+#
 90 129 BC  |Th-219  |1.05(3) µs                 |
 90 130 ABC |Th-220  |9.7(6) µs                  |0+
 90 131 A   |Th-221  |1.68(6) ms                 |(7/2+)
 90 131 B   |Th-221  |1.73(3) ms                 |(7/2+)
 90 131 C   |Th-221  |1.73 ms                    |
 90 132 A   |Th-222  |2.05(7) ms                 |0+
 90 132 BC  |Th-222  |2.237(13) ms               |0+
 90 133 AB  |Th-223  |0.60(2) s                  |(5/2)+
 90 133 C   |Th-223  |0.65 s                     |
 90 134 A   |Th-224  |1.05(2) s                  |0+
 90 134 B   |Th-224  |0.81(10) s                 |0+
 90 134 C   |Th-224  |1.05 s                     |
 90 135 AB  |Th-225  |8.72(4) min                |(3/2)+
 90 135 C   |Th-225  |8.72 min                   |(3/2+)
 90 136 AB  |Th-226  |30.57(10) min              |0+
 90 136 C   |Th-226  |30.83 min                  |0+
 90 137 AB  |Th-227  |18.68(9) d                 |1/2+
 90 137 C   |Th-227  |18.72 d                    |(3/2+)
 90 138 AB  |Th-228  |1.9116(16) a               |0+
 90 138 C   |Th-228  |1.913 a                    |0+
 90 139 AB  |Th-229  |7.34(16)E+3 a              |5/2+
 90 139 C   |Th-229  |7.9E+3 a                   |5/2+
 90 139 A*  |Th-229m |70(50) h                   |3/2+             |0.0035(10) keV
 90 139 B   |Th-229m |13.9(30) h                 |                 |0.0035 MeV
 90 140 ABC |Th-230  |7.538(30)E+4 a             |0+
 90 141 ABC |Th-231  |25.52(1) h                 |5/2+
 90 142 AB  |Th-232  |1.405(6)E+10 a             |0+
 90 142 C   |Th-232  |1.40E+10 a                 |0+
 90 143 AC  |Th-233  |22.3(1) min                |1/2+
 90 143 B   |Th-233  |21.83(4) min               |1/2+
 90 144 ABC |Th-234  |24.10(3) d                 |0+
 90 145 AB  |Th-235  |7.2(1) min                 |(1/2+)#
 90 145 C   |Th-235  |7.2 min                    |
 90 146 AB  |Th-236  |37.5(2) min                |0+
 90 146 C   |Th-236  |37.5 min                   |
 90 147 A   |Th-237  |4.8(5) min                 |5/2+#
 90 147 B   |Th-237  |4.7(6) min                 |(5/2+)
 90 147 C   |Th-237  |5.0 min                    |
 90 148 AB  |Th-238  |9.4(20) min                |0+
 90 148 C   |Th-238  |9.4 min                    |

Femto 11:07, 17 November 2005 (UTC)

Talk[edit]


Any theoretical explanation about Th-216 ?[edit]

Any theoretical explanation about Th-216 and its instability? Thorium-216 has a magic number (physics) for neutrons of 126, and thus the atomic mass number of 90 + 126 = 216, yet Th-216 is pretty darned unstable.
The most common and stable isotope of thorium is Th-232, which has 90 protons and 142 neutrons, neither of which is a magic number. On the other hand, lead-208 has magic numbers for both protons and neutrons, 82 + 126 = 208, and bismuth-209 has a magic number for neutrons: 83 + 126 = 209, and it is practically stable.47.215.188.197 (talk) 05:07, 8 March 2017 (UTC)

Because all the closed nuclear shells in the world will not save you from being so far from the beta stability line. That doom is governed by the weak force, not the strong force which is related to nuclear shells. Double sharp (talk) 05:22, 15 April 2017 (UTC)

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Occurrence of thorium 230[edit]

It is reported that 230_Th is 0.02% of thorium, Its half life is given as 75,380 years. it therefore decays 1.405e10/7.538e4 times as fast as 232_Th. That is more than 186 thousand. How on earth can 230_Th be even as much as 0.02% of existing thorium? It is a great-great-granddaughter of 238_U. So presumably occurs as 7.538e4/4.468e9 of 238_U, which is less than 0.000017 of uranium abundance.

Here's another question: Do common thorium deposits contain the 230 isotope, or does it mainly appear in uranium deposits? DaveyHume (talk) 17:51, 8 May 2017 (UTC)

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