Talk:Isotopes of copernicium

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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.
  • (F) "Indication for a gaseous element 112" (PDF). 
  Z   N refs symbol  half-life                   spin              excitation energy
112 165 A   |Cn-277 |1.1(7) ms                  |3/2+#
112 165 B   |Cn-277 |0.69(+69-24) ms            |
112 165 C   |Cn-277 |~0.24 ms                   |
112 166 AB  |Cn-278 |10# ms                     |0+
112 167 AB  |Cn-279 |0.1# s                     |
112 168 AB  |Cn-280 |1# s                       |0+
112 169 A*  |Cn-281 |10# s                      |3/2+#
112 170 A   |Cn-282 |30# s                      |0+
112 170 B   |Cn-282 |0.50(+33-14) ms            |
112 171 A   |Cn-283 |4.2(21) min                |
112 171 B   |Cn-283 |4.0(+13-7) s               |
112 171 C   |Cn-283 |~3. min                    |
112 171 F   |Cn-283 |~5 min                     |
112 172 A   |Cn-284 |31(18) s                   |0+
112 172 B   |Cn-284 |97(+31-19) ms              |
112 172 C   |Cn-284 |~9.8 s                     |
112 173 A   |Cn-285 |40(30) min                 |5/2+#
112 173 B   |Cn-285 |29(+13-7) s                |
112 173 C   |Cn-285 |~11. min                   |

Femto 13:09, 18 November 2005 (UTC)

I changed the symbol to Cn in the above list. Double sharp (talk) 04:03, 2 November 2012 (UTC)



User:Kingdon, I've reverted and added your cite above. The problem is not the lack of data but that there is so much of it. The older CRC data says ~3 min. Audi lists four events

  • (9.3 min & 3.8 min) Nature, 400, 242: Oganessian et al.
  • (3.0 min & 0.9 min) European Physical Journal A, 5, 63: Oganessian et al.

and averages them, assymetric uncertainty 3(+3–1) min, respectively symmetricized 4.2(21) min. This would be an appropriate value for Wikipedia to cite per WP:RS. However, BNL lists a tentative half life of 4.0(+13-7) s, for an unknown level.

  • Nuclear Data Sheets 106, 251 (2005)

I simply don't feel qualified to choose which data is correct, and I think doing so may be WP:OR, so I originally left the entry blank. Femto 12:49, 12 February 2007 (UTC)

OK. I had somewhat the same problem myself. My goal was more modest than yours - I just wanted some long-lived isotope (I've usually been trying to pick the longest currently confirmed by experimental data) for the elementbox on the ununbium page. If it weren't for that 4.0(+13-7) s result I'd be tempted to try to find a notation for "all the sources are in the range of 1-10 minutes". But we can't even say that yet, apparently. If we have to, I guess we could provide an empty isotopes sections in the elementbox, like we do for Ununennium. Or list the isotope but don't list a half-life. Kingdon 13:49, 12 February 2007 (UTC)