Gamow-Teller strength deduced from Fe-54(n,p)Mn-54 cross sections at 298 MeV

Details Gamow-Teller strength deduced from Fe-54(n,p)Mn-54 cross sections at 298 MeV Gamow-Teller strength deduced from Fe-54(n,p)Mn-54 cross sections at 298 MeV

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvl..59..439v&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 59, July 27, 1987, p. 439-442. NSERC-supported research.

Physics

42

Charge Exchange, Electron Capture, Iron Isotopes, Manganese Isotopes, Supernovae, Cobalt, Computer Programs, Inelastic Neutron Scattering, 39<=A<=58, Elementary Particle Processes

Scientific paper

Gamow-Teller (GT) strength has been extracted from cross sections for the reaction Fe-54(n,p)Mn-54 at 0, 2.5, 5, 8, and 12 deg, and for an incident energy of 298 MeV. This determination of the beta(+) GT strength S(+) allows for the first time a full test of the IKeda (1964) sum rule. These data also show that the best available shell-model calculations overestimate this strength by a factor of 2. This result is significant in models of supernovae since electron capture in (fp)-shell nuclei, which is proportional to S(+), depletes the relativistic electron gas in precollapse stars.

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