セミナー(Seminar) 2020.11.20: Dr Simin Wang (MSU, USA)
2020年11月10日 | 新着情報
Lecturer: Simin WANG (MSU)
Date/Time: 14:00, November 20 (Fri), 2020
Place: Meeting Room A in Center for Computational Sciences, together with Zoom.
Title: Study of the two-proton radioactivity
Abstract: Two-proton (2p) radioactivity is a rare decay mode found in a few very proton-rich isotopes. The 2p decay width and properties of emitted protons carry invaluable information on nuclear structure in the presence of a low-lying proton continuum. For example, in mid-heavy nuclei, the measured 2p decay of 67Kr turned out to be unexpectedly fast . And more recently, as the mirror of the halo nucleus 11Li, 11O was observed for the first time with a very broad peak . To understand these exotic phenomena, we apply the Gamow coupled-channel method, which describes structure and decays of three-body systems within one coherent theoretical framework by utilizing resonant and scattering states in eigenfunction expansion . The calculated lifetimes, angular correlations, and other properties indicate that the nuclear inner structure and continuum effect play a significant role in the decay process [2,3]. Moreover, to provide insights into the impact of nucleonic superfluidity on two-nucleon decay processes, we are developing a novel time-dependent approach, which will allow us to consider different experimental initial-setups and directly compare the predictions and data without losing structural information. With this new approach, we reveal the different dynamics of 2p and 2n decays.
 Goigoux et al., Phys. Rev. Lett. 117, 162501 (2016).
 T.B. Webb et al., Phys. Rev. Lett. 122, 122501 (2019).
 S. M. Wang and W. Nazarewicz, Phys. Rev. Lett. 120, 212502 (2018).
This seminar is given in English. Contact the organizer (Kai Wen) to obtain the Zoom link.