Production of Proton-rich Nuclei

Details Production of Proton-rich Nuclei Production of Proton-rich Nuclei

Jul 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971natur.232..247d&link_type=abstract

Nature, Volume 232, Issue 5308, pp. 247-248 (1971).

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THE p-elements, those rich in protons, are less abundant than the s or r-elements by factors between 10-3 and 10-4, and are usually bypassed in a slow or fast neutron capturing chain. It has been suggested that they are produced either by (p, γ) or (γ, n) reactions1. Formation by (p, γ) reactions in the envelopes of supernovae, however, would be limited by the short duration of the phenomena2. Other suggestions by Ito3 and Malkiel4 are also inadequate. The smoothness of the abundance distribution of p-elements5,6, however, suggests that they might have been synthesized in one physical environment, and recently there have been attempts to explain the abundances by positron capture in s-elements7 or by spallation processes8. This article is a preliminary report of an investigation of the abundance distribution of p-elements formed in a single event-the fission of highly excited nuclei in supernovae.

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