Speaker
Prof.
Xiaodong Tang
(Institute of Modern Physics, CAS)
Description
The stellar beta-decay rate of 59Fe at typical carbon shell burning temperature is determined by taking the experimental Gamow-Teller transition strengths of the 59Fe excited states. The new rate is up to a factor of 2.5 lower than theoretical rate of Fuller-Fowler-Newman (FFN) and up to a factor of 5 higher than decay rate of Langanke and Martinez-Pinedo (LMP) in temperature region of 0.5≤T[GK]≤2. The impact of the newly determined rate on the synthesis of cosmic gamma emitter 60Fe in the C-shell burning and explosive C/Ne burning is estimated by using one-zone model calculation. Our results show that 59Fe stellar beta−decay plays an important role in the 60Fe nucleosynthesis. Future experiment will be discussed to improve the uncertainty.
Primary authors
Prof.
Chong Qi
(Department of Physics, KTH Royal Institute of Technology, Sweden)
Dr
Kuo-Ang Li
(Institute of Modern Physics, CAS)
Prof.
Xiaodong Tang
(Institute of Modern Physics, CAS)
Dr
Yi-Hua Lam
(Institute of Modern Physics)
Co-author
Dr
Ningtao Zhang
(Institute of Modern Physics, CAS)