Gamow-teller strength and electron capture cross-section calculation by pn-QRPA for selected fp-shell nuclei

Authors : Jameelun NABI, Muhammad RİAZ, Asim ULLAH

Pages : 6-11

Doi:10.17678/beuscitech.640057

View : 17 | Download : 9

Publication Date : 2020-06-18

Article Type : Research Paper

Abstract :The allowed Gamow-Teller insert ignore into journalissuearticles values(GT); strengths and associated weak interaction rates on fp-shell nuclides are the most familiar processes of spin-isospin insert ignore into journalissuearticles values(στ); type. These rates play a crucial role in several astrophysical processes, particularly in nuclear synthesis and supernova-explosions. As per simulation consequences, the electron capture cross-section on medium-heavy nuclei has a key impact on decreasing the ratio of electron-to-baryon of the stellar matter during the late stages of stars formation. Stellar model based on the theoretical approaches should be tested against the available measured data. In the current work we present calculated Gamow-Teller strength distributions by pn-QRPA model for selected fp-shell nuclei insert ignore into journalissuearticles values( 42 Ti, 46 Cr, 50 Fe and 54 Ni); and compare our results with available measured data. The Gamow-Teller strength distributions are well fragmented over the energy range 0-12 MeV and have a good comparison with experimental data. We calculate the electron capture cross-section for selected nuclei at temperature 0.5 MeV, 1.0 MeV and 1.5 MeV that shows the temperature dependence of calculated electron capture cross-section for astrophysical applications. 
Keywords : Gamow Teller transitions, Electron capture cross section