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SUMMARY:The 9th Academic Salon of State Key Laboratory of Dark Matter Phys
 ics
DTSTART;VALUE=DATE-TIME:20260529T033000Z
DTEND;VALUE=DATE-TIME:20260529T053000Z
DTSTAMP;VALUE=DATE-TIME:20260606T081700Z
UID:indico-event-5026@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Chang Ma (Yanshan University)\n\nTitle: Theoretical
  description for nuclear beta decay in lead region Speaker: Dr. Chang Ma
  (Yanshan University) Host: Prof. Ke Han Abstract:Nuclear beta decay in
  the lead region provides important nuclear-structure information and is c
 rucial to the interpretation of rare-event searches in low-background expe
 riments such as PandaX. In this seminar\, I will present our recent theore
 tical calculations of beta-decay properties for nuclei around the Pb–Bi
 –Po region\, with particular emphasis on beta-decay spectra and logft va
 lues of first-forbidden transitions. The calculations are performed within
  a comprehensive framework\, in which the relevant nuclear matrix elements
  are evaluated by using the nuclear shell model and combined with relativi
 stic lepton wave functions incorporating finite nuclear-size and Coulomb s
 creening effects. Furthermore\, a Bayesian model is developed to analyze t
 he role of nuclear-structure effects\, quenching factors\, and theoretical
  uncertainties in shaping observables. I will also discuss how these calcu
 lations can provide useful nuclear inputs for background characterization 
 in PandaX-related studies\, and outline possible extensions toward a more 
 systematic description of beta-decay properties in heavy nuclei. Biograph
 y:Dr. Chang Ma is a lecturer at the School of Science\, Yanshan University
 . He received his Ph.D. in theoretical nuclear physics from SJTU in 2024. 
 His research interests include the low-lying nuclear structure and nuclear
  beta decay based on the nuclear shell model and its nucleon-pair approxim
 ation (NPA). During his doctoral studies\, he developed an advanced NPA fr
 amework that improves computational efficiency by orders of magnitude\, an
 d successfully applied it to the study of nuclear spectra\, electromagneti
 c properties\, and beta-decay transitions. To date\, he has published more
  than 10 first-author papers in Physical Review C\, and is currently suppo
 rted by the Young Scientists Fund (Category C) of NSFC. Alternative onlin
 e link:https://meeting.tencent.com/dm/KaZBNIkIv7sR (ID:627395318  Passwo
 rd: 123456 )\n\nhttps://indico-tdli.sjtu.edu.cn/event/5026/
LOCATION:5#/6th-603 - Meeting Room 603 (Science Building)
URL:https://indico-tdli.sjtu.edu.cn/event/5026/
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