The 76Se Gamow-Teller strength distribution and its importance for stellar electron capture rates

Details The 76Se Gamow-Teller strength distribution and its importance for stellar electron capture rates The 76Se Gamow-Teller strength distribution and its importance for stellar electron capture rates

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011nupha.859..172z&link_type=abstract

Nuclear Physics A, Volume 859, Issue 1, p. 172-184.

Physics

Nuclear Physics

1

Beta Decay, Electron Capture, Core Collapse Supernova, Shell-Model

Scientific paper

Recent theoretical studies predicted that, due to nuclear correlations across the N=40 shell gap, electron captures on nuclei with proton numbers Z<40 and neutron numbers N>40 would not be strongly suppressed due to Pauli blocking of Gamow-Teller (GT) transitions. This prediction has recently been confirmed by the experimental determination of the single-particle occupation numbers in 76Se and by the measurement of the 76Se GT+ strength distribution. In this manuscript we derive such occupation numbers and GT+ distributions within large-scale shell model studies. Based on the same models, we calculate stellar electron capture rates and compare them to those obtained from the experimental GT+ data.

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