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I question the inclusion of hypernovae in this article, as I am inclined to believe they are theoretical and have not yet been observed. Can anyone confirm or refute this? In any case, it is clear that this article needs some citations. DAID 02:11, 19 July 2007 (UTC)
The Chadwick, J. and Goldhaber, M. paper makes absolutely no statement concerning Rutherford’s proposal that the neutron is a proton with an incorporated electron. The paper’s only reference to Rutherford concerns the disintegration of the deuteron by polonium alpha particles. Chadwick and Goldhaber address the mass of the neutron. They proposed the mass of the neutron based on the mass of the deuteron less the mass of the proton plus the energy of the absorbed photon. This conforms to Rutherford’s proposal that the neutron is a proton with an incorporated electron. See: Chadwick, J. and Goldhaber, M. 1934, A ‘Nuclear Photo-effect’: Disintegration of the Diplon by -rays. Nature134, 237 My Flatley (talk) 19:55, 28 July 2010 (UTC)
I stand corrected. Indeed, I did not check the source article. I have changed the word "proved" (implying that the paper claimed this result) to "proves" (implying that the experiment can now be interpreted to prove the claim). The basis for my statement can be found in the referenced nuclear physics text by Livesey. --PloniAlmoni (talk) 06:52, 18 August 2010 (UTC)
Most of this page is about light elements. Several pages link here that refer to photodisintegration involving heavier elements e.g. Si - Ni. If someone has knowledge of photodisintegration of those elements, a new section would be good.Morngnstar (talk) 08:35, 15 February 2013 (UTC)