Implications of the recent [sup 59]Co([ital n],[ital p])[sup 59]Fe experiment for stellar electron capture rates

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.2961· OSTI ID:6497281

Aufderheide, M B; Bloom, S D; Resler, D A; Mathews, G J ^[1]

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1. Physics Department, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

We study results from the recent measurement of the 0[degree] [sup 59]Co([ital n],[ital p])[sup 59]Fe cross section in order to compute the stellar electron capture rate of [sup 59]Co. This nucleus is the second most important electron capture nucleus in the core of a type II supernova progenitor just before core collapse. It is also the first nucleus which has a large effect on the stellar neutronization rate for which Gamow-Teller strength has been measured. The Gamow-Teller resonance has been observed experimentally at a higher energy above the daughter ground state than one would expect from independent particle shell model arguments, but large-basis shell model calculations employing configuration mixing are more successful in predicting the location of the strength. Because of the high energy of the Gamow-Teller resonance, the stellar electron capture rate and associated neutronization is much less than previous estimates had indicated. Similar trends are seen for [sup 60]Co, the most important electron capture nucleus for supernova progenitors just before core collapse.

• OSTI ID: 6497281
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:6; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
663550 -- Nuclear Mass Ranges-- A=59-89-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
CHARGE-EXCHANGE REACTIONS
COBALT 59
COBALT 59 TARGET
COBALT ISOTOPES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DIFFERENTIAL CROSS SECTIONS
ELECTRON CAPTURE
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
FERMIONS
GAMOW-TELLER RULES
HADRON REACTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
IRON 59
IRON ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
NEUTRON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUCLEOSYNTHESIS
ODD-EVEN NUCLEI
PROTONS
RADIOISOTOPES
SHELL MODELS
STABLE ISOTOPES
SYNTHESIS
TARGETS