Talk:Nuclear isomer

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9 + 1 = 8

According to the section Nucleus, ^180m
₇₃Ta
and ¹⁸⁰
₇₃Ta
have spin of -9 and +1 respectively. According to the section High spin suppression of decay, the spin changes 8 units when one decays to the others. Can both be correct? Klausok (talk) 10:32, 27 June 2016 (UTC)[reply]

@Klausok:

A good question which no one has answered after almost 2 years. Yes, there is an error here. Actually, the magnitudes of all nuclear spins without exception are nonnegative (positive or zero). The spin of ^180m
₇₃Ta
is sometimes written as 9– (rather than –9) as in the table in the article on isotopes of tantalum, but the minus sign following the 9 refers to the parity of the quantum wave function; it does not imply that the spin is negative. I have not yet found this spin and parity notation properly described anywhere in Wikipedia. For now I will just remove the minus sign in this article for ^180m
₇₃Ta
, and also for ^99m
₄₃Tc
. Dirac66 (talk) 15:24, 18 April 2018 (UTC)[reply]

Merger proposal

An isomeric transition is described as "similar to any gamma emission from any excited nuclear state, but differs in that it involves excited metastable states of nuclei with longer half lives," i.e. nuclear isomers. So it seems to me that isomeric transitions are not special enough to deserve their own page, and the isomeric transition stub should be merged and redirected into nuclear isomer. Some might want to consider isomeric shift in making up their minds, though I am not proposing anything about that article at this time.--Yannick (talk) 17:58, 9 May 2012 (UTC)[reply]

I agree. The stub isomeric transition can be entirely discussed in this article, and redirected to it. S B H arris 19:59, 9 May 2012 (UTC)[reply]

The merger was performed in 2012. 67.198.37.17 (talk) 21:24, 4 July 2017 (UTC)[reply]

Someone undid this merger, but I agree and remerged the sections during ce of the article HRouillier (talk) 17:12, 10 November 2017 (UTC)[reply]

Excitation energy

Could someone add Excitation energy? Looking for a definition. -DePiep (talk) 11:06, 13 June 2019 (UTC)[reply]

Could become #REDIRECT Excited state just this minute if I noticed at least one main-space inbound link. Incnis Mrsi (talk) 16:14, 13 June 2019 (UTC)[reply]