Open AccessNeutrino energy loss rates due to 66-71Ni in stellar matter
Author(s) -
Fakeha Farooq,
R. Shehzadi,
JameelUn Nabi
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/899/1/012005
Subject(s) - neutrino , physics , lepton , astrophysics , isotope , stars , nuclear physics , electron
Rates for (anti-)neutrino energy loss on nickel isotopes, due to interactions involving weak decays (β ± -decay and lepton captures) are regarded as having fundamental importance during late evolutionary stages of massive stars. These rates substantially affect the leptonic ratio (Y e ) of stellar interior. For the densities less than 10 11 g/cm 3 , weak processes produce (anti-)neutrinos which cause reduction in the stellar core’s entropy. In this paper, rates for neutrino and anti-neutrino energy loss on nickel neutron-rich isotopes ( 66-71 Ni) have been presented. Rates for energy loss have been determined by applying the deformed pn-QRPA model. The ranges for temperature and density, have been used to determine the rates, are from 0.01 to 30 (10 9 K) and 10 1 to 10 11 (g/cm 3 ), respectively. Our computed rates for energy loss, at higher temperature regions, are enhanced in comparison with previously reported rates of Pruet and Fuller (PF).