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"Fusion of elements heavier than this does not release energy, and so the probability of finding discrepancies in the Oddo–Harkins rule becomes lower." While it is true that elements beyond the iron peak do not release energy, this does not produce discrepancies. The Oddo-Harkins rule remains true throughout the iron peak and beyond. Please cite source. Urayness (talk) 02:28, 25 January 2024 (UTC)[reply]
I reverted the addition of a nice graph included by @Urayness. I want explain and see if there is a compromise.
The existing graph illustrates the key point of the rule: even-odd zig zag. The new graph focuses on the origin of different ranges of Z by color coding.
Is there a story that goes with the color coding in the context of the Oddo-Harkins rule? If so let's tell that in addition. But I think the basic figure better illustrates the basic rule. Johnjbarton (talk) 19:54, 28 March 2024 (UTC)[reply]
That's fine. The color coding doesn't directly reflect on the Oddo-Harkins rule, I just updated the graph for use on another page that I'm working on and thought I would include it here. I'm intrigued by the possible nucleosynthetic origins of Oddo Harkins phenomenon, though. 195.158.72.54 (talk) 21:35, 28 March 2024 (UTC)[reply]
Yes, the article claims, without reference, that "ordinary" nucleosynthesis obeys the rule but not the big bang and other category. I think if we could find some sources your graph would dramatize the Z ranges which don't obey. Johnjbarton (talk) 22:03, 28 March 2024 (UTC)[reply]
For future reference the graph we are discussing is: Nucleosynthetic origins of light nuclides. The most abundant nuclides have equal numbers of protons and neutrons (box around isotopic symbol). Products of cosmic ray spallation are the least abundant.Johnjbarton (talk) 23:55, 28 March 2024 (UTC)[reply]
@Urayness you may like to look at the similar figure in
Faure, Gunter; Mensing, Teresa M. (2007). Introduction to planetary science: the geological perspective. Dordrecht: Springer. ISBN 978-1-4020-5544-7.
Do you have a screenshot of this figure you can send me? I believe it is relevant that within the "SPALLATION" box in my diagram the odd-atomic numbered isotopes are more abundant in direct contravention of the Oddo-Harkins rule.
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