Abstract:
Weak-interaction processes of atomic nuclei, including (single) beta decay, electron captures, double beta decay etc. are important for us to explore and understand many fundamental problems in nuclear, particle and astrophysics, such as the mass hierarchy of neutrinos, the evolution of massive stars, the origin of heavy elements etc. In this talk I will introduce briefly some of our works in the past years on nuclear weak-interaction process. On one hand, the nuclear matrix elements of neutrinoless double beta decay will be discussed concentrating on the uncertainty from transition operators based on chiral effective field theory. On the other hand, electron capture rates which affect core-collapse supernova explosion simulations will be discussed based on some nuclear-structure model calculations. Finally, we analyze the possible effect of nuclear excited states on the Urca cooling mechanism in accreting neutron stars. Besides, I will probably mention a little bit about what we are going to finish in the near couple years on beta spectrum, neutrino spectrum, forbidden transition for single beta decay etc.
Biography:
Dr. Longjun Wang is an associate professor of the Southwest University in Chongqing, China. He obtained his PhD degree from Shanghai Jiao Tong University in 2016 and then worked at the University of North Carolina at Chapel Hill as a postdoctoral fellow before joining the Southwest University in 2019. He is interested in nuclear structure and astrophysics, including high-spin states, neutrinoless double beta decay, stellar electron captures etc. He has more than 25 publications on Phys. Rev. Lett, Phys. Lett. B, Phys. Rev. C (Rapid communication or Letter), Astrophys. J. etc.
Online Meeting room: https://meeting.tencent.com/dm/GD6yu7FScc9N
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