Gamow-Teller Transition Strengths from Ni56

Details Gamow-Teller Transition Strengths from Ni56 Gamow-Teller Transition Strengths from Ni56

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvl.107t2501s&link_type=abstract

Physical Review Letters, vol. 107, Issue 20, id. 202501

Physics

3

Shell Model, Charge-Exchange Reactions, Charge-Exchange Reactions, Weak Interaction And Neutrino Induced Processes, Galactic Radioactivity

Scientific paper

A new technique to measure (p,n) charge-exchange reactions in inverse kinematics at intermediate energies on unstable isotopes was successfully developed and used to study the Ni56(p,n) reaction at 110MeV/u. Gamow-Teller transition strengths from Ni56 leading to Cu56 were obtained and compared with shell-model predictions in the pf shell using the KB3G and GXPF1A interactions. The calculations with the GXPF1A interaction reproduce the experimental strength distribution much better than the calculations that employed the KB3G interaction, indicating deficiencies in the spin-orbit and proton-neutron residual potentials for the latter. The results are important for improving the description of electron-capture rates on nuclei in the iron region, which are important for modeling the late evolution of core-collapse and thermonuclear supernovae.

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