Electron Capture Strength for {60,62}Ni and {58,60,62,64}Nip,n{58,60,62,64}Cu reactions at 134.3 MeV - Nuclear ExperimentReport as inadecuate

Electron Capture Strength for {60,62}Ni and {58,60,62,64}Nip,n{58,60,62,64}Cu reactions at 134.3 MeV - Nuclear Experiment - Download this document for free, or read online. Document in PDF available to download.

Abstract: Background: The strength of electron capture for medium mass nuclei has asignificant effect on the evolution of supernovae. There is insufficientknowledge of these strengths and very little data for important radioactivenuclei. Purpose: Determine whether it is feasible to obtain EC strength fromstudies of T o+1 excitations in p,n reactions, and whether this might yieldinformation for radioactive nuclei. Methods: Cross sections for the{58,60,62,64}Nip,n{58,60,62,64}Cu reactions were measured over the angularrange of 0.3 deg to 11.6 deg at 134.3 MeV using the IUCF neutron time-of-flightfacility. esults: The T o+1 excitations in {60,62}Ni were identified bycomparison with inelastic proton scattering spectra, their BGT wereextracted, and the corresponding electron capture rates in supernovae werecalculated. Data from the TRIUMF n,p experiments at 198 MeV were reanalyzed;the electron capture rates for the reanalyzed data are in moderately goodagreement with the higher resolution p,n results, but differ in detail. Thepossibility of future measurements with radioactive nuclei was considered.Conclusions: It is possible to determine electron capturestrength from p,nexperiments. This approach may make it possible to obtain electron capturestrength for radioactive nuclei by studying p,n reactions in inversekinematics.

Author: N. Anantaraman, Sam M. Austin, B.A. Brown, G.M. Crawley, A. Galonsky, R.G.T. Zegers, B.D. Anderson, A.R. Baldwin, B.S. Flanders,

Source: https://arxiv.org/


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