Gamow-Teller transitions to Zr93 via the Nb93(t,He3+γ ) reaction at 115 MeV/u and its application to the stellar electron-capture rates

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
B. Gao ◽  
R. G. T. Zegers ◽  
J. C. Zamora ◽  
D. Bazin ◽  
B. A. Brown ◽  
...  
Keyword(s):  
Electron Capture ◽  
Gamow Teller ◽  
Capture Rates

Study of Gamow–Teller strength and associated weak-rates on odd-A nuclei in stellar matter

2018 ◽  
Vol 27 (03) ◽  
pp. 1850019 ◽  
Author(s):  
Muhammad Majid ◽  
Jameel-Un Nabi ◽  
Muhammad Riaz
Keyword(s):  
Electron Capture ◽  
Theoretical Calculations ◽  
Random Phase ◽  
Measured Data ◽  
Particle Model ◽  
Transition Strength ◽  
Positron Emission ◽  
Stellar Temperature ◽  
Gamow Teller ◽  
Capture Rates

In a recent study by Cole et al. [A. L. Cole et al., Phys. Rev. C 86 (2012) 015809], it was concluded that quasi-particle random phase approximation (QRPA) calculations show larger deviations and overestimate the total experimental Gamow–Teller (GT) strength. It was also concluded that QRPA calculated electron capture rates exhibit larger deviation than those derived from the measured GT strength distributions. The main purpose of this study is to probe the findings of the Cole et al. paper. This study gives useful information on the performance of QRPA-based nuclear models. As per simulation results, the capturing of electrons that occur on medium heavy isotopes have a significant role in decreasing the ratio of electron-to-baryon content of the stellar interior during the late stages of core evolution. We report the calculation of allowed charge-changing transitions strength for odd-[Formula: see text] [Formula: see text]-shell nuclei ([Formula: see text]Sc and [Formula: see text]Mn) by employing the deformed pn-QRPA approach. The computed GT transition strength is compared with previous theoretical calculations and measured data. For stellar applications, the corresponding electron capture rates are computed and compared with rates using previously calculated and measured GT values. Our finding shows that our calculated results are in decent accordance with measured data. At higher stellar temperature, our calculated electron capture rates are larger than those calculated by independent particle model (IPM) and shell model. It was further concluded that at low temperature and high density regions, the positron emission weak-rates from [Formula: see text]Sc and [Formula: see text]Mn may be neglected in simulation codes.

The 76Se Gamow–Teller strength distribution and its importance for stellar electron capture rates

2011 ◽  
Vol 859 (1) ◽  
pp. 172-184 ◽  
Author(s):  
Q. Zhi ◽  
K. Langanke ◽  
G. Martínez-Pinedo ◽  
F. Nowacki ◽  
K. Sieja
Keyword(s):  
Electron Capture ◽  
Strength Distribution ◽  
Gamow Teller ◽  
Capture Rates

scholarly journals Gamow-Teller strengths and electron-capture rates forpf-shell nuclei of relevance for late stellar evolution

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
A. L. Cole ◽  
T. S. Anderson ◽  
R. G. T. Zegers ◽  
Sam M. Austin ◽  
B. A. Brown ◽  
...  
Keyword(s):  
Electron Capture ◽  
Stellar Evolution ◽  
Gamow Teller ◽  
Capture Rates ◽  
Gamow Teller Strengths

scholarly journals Gamow-Teller transitions toCa45via theSc45(t,He3+γ)reaction at115 MeV/uand its application to stellar electron-capture rates

2015 ◽  
Vol 92 (2) ◽  
Author(s):  
S. Noji ◽  
R. G. T. Zegers ◽  
Sam M. Austin ◽  
T. Baugher ◽  
D. Bazin ◽  
...  
Keyword(s):  
Electron Capture ◽  
Gamow Teller ◽  
Capture Rates

β+Gamow-Teller Transition Strengths fromTi46and Stellar Electron-Capture Rates

2014 ◽  
Vol 112 (25) ◽  
Author(s):  
S. Noji ◽  
R. G. T. Zegers ◽  
Sam M. Austin ◽  
T. Baugher ◽  
D. Bazin ◽  
...  
Keyword(s):  
Electron Capture ◽  
Teller Transition ◽  
Gamow Teller ◽  
Capture Rates

scholarly journals Screening Corrections to the Electron Capture Rates in Dense Stars by the Relativistically Degenerate Electron Liquid

2002 ◽  
Vol 579 (1) ◽  
pp. 380-385 ◽  
Author(s):  
Naoki Itoh ◽  
Nami Tomizawa ◽  
Masaya Tamamura ◽  
Shinya Wanajo ◽  
Satoshi Nozawa
Keyword(s):  
Electron Capture ◽  
Degenerate Electron ◽  
Dense Stars ◽  
Capture Rates
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