Sm-146 production by the gamma-process

Details Sm-146 production by the gamma-process Sm-146 production by the gamma-process

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354l..21w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 354, May 1, 1990, p. L21-L24. Research supported by the Lawrence

Astronomy and Astrophysics

Astrophysics

31

Abundance, Gamma Rays, Photodecomposition, Samarium Isotopes, Supernovae, Cosmochemistry, Cross Sections, Gadolinium Isotopes, Nuclear Fusion

Scientific paper

The production of Sm-146, an Nd-142 progenitor, by the gamma-process in supernovae is reexamined. Reasonable changes in nuclear reaction rates for the photodestruction of Gd-148, especially its destruction by Gd-148(gamma, n)Gd-147 and Gd-148(gamma, alpha)Sm-144, now yield an Sm-146 production increased by up to 20 times that of previous work. The increased value is consistent with the cosmochemical data. A laboratory measurement of the cross section for Sm-144(alpha, gamma)Gd-148 at a center of mass energy near 10 MeV is feasible and would greatly clarify an uncertain situation for nucleosynthesis and cosmochronology.

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