Talk:Isotopes of fermium

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
100 142 AB  |Fm-242  |0.8(2) ms                  |0+
100 142 C   |Fm-242  |0.8 ms                     |
100 143 A   |Fm-243  |210(60) ms                 |7/2-#
100 143 B   |Fm-243  |0.18(+8-4) s               |(7/2+)
100 143 C   |Fm-243  |0.2 s                      |
100 144 ABC |Fm-244  |3.3(5) ms                  |0+
100 145 A   |Fm-245  |4.2(13) s                  |1/2+#
100 145 BC  |Fm-245  |4.2(13) s                  |
100 146 AB  |Fm-246  |1.1(2) s                   |0+
100 146 C   |Fm-246  |1.2 s                      |0+
100 147 A   |Fm-247  |35(4) s                    |5/2+#
100 147 B   |Fm-247  |29(1) s                    |(7/2+)
100 147 C   |Fm-247  |35. s                      |
100 147 A*  |Fm-247m |9.2(23) s                  |                 |non-exist
100 147 D   |Fm-247m |9.2(23) s                  |                 |0+W keV
100 147 C   |Fm-247m |9. s                       |
100 147 B   |Fm-247m |4.3(4) s                   |(1/2+)           |0 MeV
100 148 A   |Fm-248  |36(3) s                    |0+
100 148 B   |Fm-248  |36(2) s                    |0+
100 148 C   |Fm-248  |34. s                      |0+
100 149 ABC |Fm-249  |2.6(7) min                 |(7/2+)#
100 150 ABC |Fm-250  |30(3) min                  |0+
100 150 A   |Fm-250m |1.8(1) s                   |7,8#             |1500(300)# keV
100 150 E   |Fm-250m |1.8(1) s                   |0+               |0+X keV
100 150 C   |Fm-250m |1.8 s                      |
100 151 ABC |Fm-251  |5.30(8) h                  |(9/2-)
100 151 AD  |Fm-251m |15.2(23) µs                |(5/2+)           |191(2) keV
100 152 ABC |Fm-252  |25.39(4) h                 |0+
100 153 AB  |Fm-253  |3.00(12) d                 |(1/2)+
100 153 C   |Fm-253  |3.0 d                      |1/2+
100 154 ABC |Fm-254  |3.240(2) h                 |0+
100 155 ABC |Fm-255  |20.07(7) h                 |7/2+
100 156 ABC |Fm-256  |157.6(13) min              |0+
100 157 ABC |Fm-257  |100.5(2) d                 |(9/2+)
100 158 A   |Fm-258  |370(14) µs                 |0+
100 158 B   |Fm-258  |370(43) µs                 |0+
100 158 C   |Fm-258  |0.37 ms                    |
100 159 A   |Fm-259  |1.5(3) s                   |3/2+#
100 159 BC  |Fm-259  |1.5(3) s                   |
100 160 A*  |Fm-260  |1# min                     |0+
100 160 B   |Fm-260  |~4 ms                      |0+
100 160 C   |Fm-260  |~4 ms                      |

Femto 11:38, 17 November 2005 (UTC)

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Mendelevium

Theoretically, is there an isotope of Fermium that decays into Mendelevium? So far, by extending the rn-process, I have gotten this far, but none decay into Mendelevium. Could maybe an extremely neutron-rich isotope decay into Mendelevium, and if so, what is it/could it be? 32ieww (talk) 19:44, 11 February 2017 (UTC)