Investigation of Gamow Teller transition properties in 56–64Ni isotopes using QRPA methods

ÇAKMAK Ş. M., Nabi J., Babacan T.

Nuclear Physics A, cilt.970, ss.86-106, 2018 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 970
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.nuclphysa.2017.11.006
  • Dergi Adı: Nuclear Physics A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.86-106
  • Anahtar Kelimeler: Centroid of energy, Gamow Teller distribution, Nickel isotope, Width of energy, β-decay and electron capture
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

Weak rates in nickel isotopes play an integral role in the dynamics of supernovae. Electron capture and β-decay of nickel isotopes, dictated by Gamow–Teller transitions, significantly alter the lepton fraction of the stellar matter. In this paper we calculate Gamow–Teller (GT) transitions for isotopes of nickel, Ni56–64, using QRPA methods. The GT strength distributions were calculated using four different QRPA models. Our results are also compared with previous theoretical calculations and measured strength distributions wherever available. Our investigation concluded that amongst all RPA models, the pn-QRPA(C) model best described the measured GT distributions (including total GT strength and centroid placement). It is hoped that the current investigation of GT properties would prove handy and may lead to a better understanding of the presupernova evolution of massive stars.