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SUMMARY:The origins of the fragmentation of Fermi transitions for beta dec
 ay
DTSTART:20260212T130000Z
DTEND:20260212T140000Z
DTSTAMP:20260419T015500Z
UID:indico-event-13273@indico.ijclab.in2p3.fr
CONTACT:pierre.arthuis@ijclab.in2p3.fr
DESCRIPTION:Speakers: David Durel (CEA\, DAM\, DIF)\n\nA theoretical descr
 iption of beta radioactivity involves different modes of transition betwee
 n the states of the mother and daughter nuclei. For each of these modes\, 
 we obtain an energy spectrum in which we observe a whole range of transiti
 ons. Among these transition modes\, there is one\, the Fermi transition\, 
 which is said that it cannot fragment\, meaning that there must be one and
  only one transition. However\, theoretical calculations based on an HFB+p
 n-QRPA model show us a spectrum with several transitions...\n \nI propose
  a presentation in which I will attempt to explain the origins of this fra
 gmentation based on the structural elements provided by the HFB and pn-QRP
 A calculations. But first\, I will dedicate a portion of this presentation
  to clearly defining the methods used (HFB\, pn-QRPA\, etc) as well as a v
 ery brief overview of the theory describing beta radioactivity. These conc
 epts form the basis for understanding the shell filling mechanism and prov
 ide information for interpreting the shape of wave functions. Through a sy
 stematic study of the (even-even) nuclei of $ N=50 $ and $ Z=50 $ chains\,
  we can understand the behavior of this fragmentation and thus its origin.
  The comparison of our results with those obtained using other theoretical
  methods will be discussed\, as well as putting them into perspective with
  regard to existing experimental data.\n\nhttps://indico.ijclab.in2p3.fr/e
 vent/13273/
LOCATION:100/2-A201 - Salle A201 (IJCLab)
URL:https://indico.ijclab.in2p3.fr/event/13273/
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