First-forbidden ?-decay rates, energy rates of ?-delayed neutrons and probability of ?-delayed neutron emissions for neutron-rich nickel isotopes

Küçük Resim Yok

Tarih

2016

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Springer

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

First-forbidden (FF) transitions can play an important role in decreasing the calculated half-lives specially in environments where allowed Gamow-Teller (GT) transitions are unfavored. Of special mention is the case of neutron-rich nuclei where, due to phase-space amplification, FF transitions are much favored. We calculate the allowed GT transitions in various pn-QRPA models for even-even neutron-rich isotopes of nickel. Here we also study the effect of deformation on the calculated GT strengths. The FF transitions for even-even neutron-rich isotopes of nickel are calculated assuming the nuclei to be spherical. Later we take into account deformation of nuclei and calculate GT + unique FF transitions, stellar beta-decay rates, energy rate of beta-delayed neutrons and probability of beta-delayed neutron emissions. The calculated half-lives are in excellent agreement with measured ones and might contribute in speeding-up of the r-matter flow.

Açıklama

Anahtar Kelimeler

Weak Interaction Rates, Microscopic Calculations, Half-Lives, R-Process, Nuclei, Shell, Predictions, Rpa

Kaynak

European Physical Journal A

WoS Q Değeri

Q2

Scopus Q Değeri

Q2

Cilt

52

Sayı

1

Künye