NASA NTRS · 19750035145
A comment on gamma ray lines from He-4
Abstract
It is pointed out that excited states of He-4 cannot produce gamma ray line emission of astrophysical significance, contrary to a recent suggestion of Reina et al. (1974). The only possible gamma-ray lines in He-4 are above 25 MeV, but their excitation cross sections appear to be so small that they are probably of little astrophysical significance.
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Kozlovsky, B., Ramaty, R.. 1974-11-01. A comment on gamma ray lines from He-4. https://ntrs.nasa.gov/citations/19750035145
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