# Talk:Mirror nuclei

This article desperately needs help (or removal!). Preceding the article is an appeal to "improve" or expand it (and a request to add references or sources). However, I realize that my first attempt to do this was a bit overreaching.

Nevertheless, the term "mirror isotope" is inaccurate and misleading (as well as scientifically useless), and should be debunked (rather than promoting its use). Furthermore, in modern physics (including the RHIC lecture I attended this evening at BNL), the "mirror" notion is legitimately applied to other situations, such as "broken-mirror" symmetry of certain collisions that produce quark-gluon plasmas (or describing violations of "parity"). This incorrect use of the "mirror" to describe approximately-equal nuclear masses borders upon the mystical!

Furthermore, I argue that it does not violate NPOV for an article about "Mirror Isotope" to make clear that the word "isotope" is wrongly used and to explicitly debunk the incorrect usage. Tripodics (talk) 04:49, 15 October 2010 (UTC)

A mirror nuclei is one where the number of protons of element one (Z1) equal the number of neutrons of element two (N2) and the number of protons of element two (Z2) equal the number of neutrons in element one (N1). In short, Z1=N2 and Z2=N1.

Can someone correct this article? — Preceding unsigned comment added by 92.23.46.190 (talk) 02:44, 6 March 2012 (UTC)

Formula showing how the masses must be the same.

Z1 = Atomic number of first element
Z2 = Atomic number of second element
A1 = Atomic mass of first element
A2 = Atomic mass of second element
N1 = Number of neutrons in first element
N2 = Number of neutrons in second element

Z1 = A1 - N1 = N2
Z2 = A2 - N2 = N1

N1 = A1 - N2
A2 - N2 = A1 - N2

A2 = A1


## Article Rewritten

I have rewrote the article from scratch, it could be presented a little better but the content is now correct. 92.23.46.190 (talk) 20:12, 6 March 2012 (UTC)