the stability of nuclides
2011-11-25 8:02 am
1) Binding energy per nucleon of a nucleus is a measure of the nucleus stabiliy. As Fe-56 has the highest binding energy per nucleon, every nuclide with atomic number greater than Fe-56 should be unstable relative to Fe-56. Why don't they all decay and thus transform to Fe-56 at last? Shouldn't they all be radioactive nuclides?
回答 (1)
2011-11-26 5:18 am
✔ 最佳答案
Binding energy is only one, but not all, of the factors that affecting nuclear stability. The other main factors include:(i) The neutron-to-proton ratio, the most stable ratio being that indicated by a stability curve;
(ii) Pairing of nucleons as indicated by the even-odd rules.
You may refer to the following web-page for detailed explanation of the above two factors:
http://www.nucmedtutorials.com/dwmodesdecay/modes1.html
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