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SUMMARY:Investigation of nuclei beyond N = 126 shell closure region at the
  DESPEC Phase-0 campaign
DTSTART;VALUE=DATE-TIME:20250325T161000Z
DTEND;VALUE=DATE-TIME:20250325T163000Z
DTSTAMP;VALUE=DATE-TIME:20260511T173946Z
UID:indico-contribution-26347@indico.ific.uv.es
DESCRIPTION:Speakers: Mallicka Kundu ()\nIn this contribution\, the prelim
 inary results obtained from implantation in Active Stopper during an exper
 iment scheduled in June 2024 will be presented . This experiment is a part
  of the DESPEC collaboration at the GSI-FAIR Phase-0 campaign.The experime
 nt focuses on exploring the region beyond N = 126 shell closure\, which is
  relevant to the modeling of the r-process as most nuclei in this region a
 re formed by this process.\nIn the experiment\, a 238U beam accelerated to
  1 GeV/nucleon is directed on a 9Be target to produce heavy neutron rich n
 uclei by cold fragmentation reaction.The Fragment Separator (FRS) is used 
 to separate the exotic nuclei by in-flight technique. These separated ions
  are then implanted in AIDA active stopper which consists of two triple-wa
 fer DSSDs. The AIDA setup is placed between two plastic scintillators to m
 easure the timing of the implanted ions. A DINTESPEC detector consisting o
 f three DSSDs is positioned behind AIDA. The hybrid FATIMA + DEGAS array\,
  consisting of 36 LaBr3 and 27 HPGe detectors has been used to extract γ 
 decay and lifetime information.\nWe have observed α decays from implants 
 in the Active Stopper during our experiment and conducted some preliminary
  studies to characterize these decays. α spectra for the X strips in DSSD
 0 have been obtained with α energy aligned according to the ground-state 
 α decay of 215Po. Using an α-γ correlation analysis within a prompt tim
 e-coincidence window of approximately 4 μs\, we can successfully identify
  some peaks in the α spectra. Additionally\, an α-tagged β delayed γ s
 pectroscopy study was performed to investigate the α decays with very sho
 rt half-lives. The findings of these studies\, including the identificatio
 n of specific α decays through this methodology will be presented in this
  contribution.\n\nhttps://indico.ific.uv.es/event/7777/contributions/26347
 /
LOCATION:Parc Científic de la Universitat de València Salón de Actos Ed
 ificio de Cabecera Parque Científico
URL:https://indico.ific.uv.es/event/7777/contributions/26347/
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