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Investigation of Weak Rates for Odd-A Nuclei for Presupernova Simulations

التفاصيل البيبلوغرافية
العنوان: Investigation of Weak Rates for Odd-A Nuclei for Presupernova Simulations
المؤلفون: Muhammad Majid, Muhammad Riaz, Jameel-Un Nabi
المصدر: Brazilian Journal of Physics. 51:773-779
بيانات النشر: Springer Science and Business Media LLC, 2021.
سنة النشر: 2021
مصطلحات موضوعية: Physics, Basis (linear algebra), 010308 nuclear & particles physics, Nuclear Theory, SHELL model, General Physics and Astronomy, 01 natural sciences, Nuclear physics, Stars, Positron, Excited state, Beta (plasma physics), 0103 physical sciences, Deformation (engineering), 010306 general physics
الوصف: Calculating weak decay rates under stellar conditions for studying presupernova evolution of massive stars is a challenging task. Here, we show the importance of odd-A nuclei for presupernova simulations. In order to calculate the required nuclear matrix elements, we apply the pn-QRPA model in a deformed basis. Nuclear deformation, thought to play an integral role in calculation of associated weak decay rates, is taken into account in our model. We calculate Gamow–Teller (GT) strength distributions, $$\beta ^-$$ emission and positron capture rates for selected odd-A nuclei. Our model does not employ the Brink–Axel hypothesis as used in previous calculations of weak decay rates, and we perform a state-by-state microscopic calculation of GT strength distributions from all parent excited states. Our calculated $$\beta ^-$$ decay rates are in good agreement with large-scale shell model calculations.
تدمد: 1678-4448
0103-9733
DOI: 10.1007/s13538-021-00864-0
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::00379817abb2c08856f784c87da81867
https://doi.org/10.1007/s13538-021-00864-0
Rights: OPEN
رقم الانضمام: edsair.doi...........00379817abb2c08856f784c87da81867
قاعدة البيانات: OpenAIRE
الوصف
تدمد:16784448
01039733
DOI:10.1007/s13538-021-00864-0