$\beta$-decay of key titanium isotopes in stellar environment

Abstract

Amongst iron regime nuclei, $\beta$-decay rates on titanium isotopes are considered to be important during the late phases of evolution of massive stars. The key $\beta$-decay isotopes during presupernova evolution were searched from available literature and a microscopic calculation of the decay rates were performed using the proton-neutron quasiparticle random phase approximation (pn-QRPA) theory. As per earlier simulation results electron capture and $\beta$-decay on certain isotopes of titanium are considered to be important for the presupernova evolution of massive stars. Earlier the stellar electron capture rates and neutrino energy loss rates due to relevant titanium isotopes were presented. In this paper we finally present the $\beta$-decay rates of key titanium isotopes in stellar environment. The results are also compared against previous calculations. The pn-QRPA $\beta$-decay rates are bigger at high stellar temperatures and smaller at high stellar densities compared to the large scale shell model results. This study can prove useful for the core-collapse simulators.

14 pages, 5 figures

References in corpus (10)

• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Shell-model calculations of stellar weak interaction rates: II. Weak rates for nuclei in the mass range A=45-65 in supernovae environment
• Improved Models of Stellar Core Collapse and Still no Explosions: What is Missing?
• Two-Dimensional Hydrodynamic Core-Collapse Supernova Simulations with Spectral Neutrino Transport II. Models for Different Progenitor Stars
• Weak Interaction Rates Of sd-Shell Nuclei In Stellar Environment Calculated in the Proton-Neutron Quasiparticle Random Phase Approximation
• Microscopic Calculations of Weak Interaction Rates of Nuclei in Stellar Environment for A = 18 to 100
• Gamow-Teller strength distributions and electron capture rates for 55Co and 56Ni
• Comparative study of Gamow-Teller strength distributions in the odd-odd nucleus 50V and its impact on electron capture rates in astrophysical environments
• Weak-interaction mediated rates on iron isotopes for presupernova evolution of massive stars
• Neutrino energy loss rates and positron capture rates on ${}^{55}$Co for presupernova and supernova physics

Cited by in corpus (1)

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