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SUMMARY:Fission fragment spectroscopy of isotopically identified neutron r
 ich nuclei
DTSTART;VALUE=DATE-TIME:20210923T093000Z
DTEND;VALUE=DATE-TIME:20210923T100000Z
DTSTAMP;VALUE=DATE-TIME:20260811T111022Z
UID:indico-contribution-1935@indico.tlabs.ac.za
DESCRIPTION:Speakers: Sarmishtha Bhattacharyya (Variable Energy Cyclotron 
 centre)\nThe single-particle excitations\, particle-hole interactions\, an
 d mixing of various single particle configurations in nuclei with few vale
 nce particles or holes around $^{132}$Sn have been the subject of contempo
 rary interest\, both experimentally [1–4] and theoretically [5]. The exc
 ited states of these neutron-rich nuclei provide key inputs to understand 
 the effective interactions in terms of large scale shell model calculation
 s. Presence of high-j unique parity orbitals plays a major role in generat
 ing high spin states in these nuclei and is also responsible for occurrenc
 e of isomers in odd-A as well as in odd-odd nuclei in this region.\n\nThe 
 neutron-rich nuclei with few valence particle / holes in Z=50\, N=82 close
 d shell are only accessible via fission and direct identification of the n
 uclei with both mass (A) and charge (Z) selection is extremely challenging
 . Neutron-rich nuclei around $^{132}$Sn have been investigated using fissi
 on reaction of $^{238}$U beam of 6.2 Mev/u impinging on $^9$Be target at G
 ANIL [6]. The isotopic identification (A\, Z) of the fission fragments was
  obtained using the large acceptance magnetic spectrometer VAMOS++. The pr
 ompt $\\gamma$ rays emitted from the recoiling fission products at the tar
 get position were detected using $\\gamma$-ray tracking array AGATA and th
 e EXOGAM segmented clover detectors were placed behind the focal plane of 
 VAMOS++ to detect the delayed $\\gamma$ rays. Some of the complimentary st
 udies on low lying states have also been carried out from decay spectrosco
 py after $\\alpha$ induced fission at VECC\, Kolkata.\n\nThe high spin sta
 tes of neutron rich Iodine nuclei above the long lived isomers are populat
 ed for the first time and new isomers are also identified from prompt-dela
 yed spectroscopy [7]. The level structures are interpreted in terms of the
  systematics of odd-Z nuclei above the Z = 50 shell closure and large-scal
 e shell model calculations.\n\nReferences:\n[1] A. Navin and M. Rejmund\, 
 in McGraw-Hill Yearbook of Science and Technology (McGraw-Hill\, New York\
 , 2014)\, p. 137.\n[2] K. L. Jones et al.\, Nature (London) 465\, 454 (201
 0).\n[3] M. Rejmund et al.\, Phys. Lett. B 753\, 86 (2016).\n[4] S. Bhatta
 charyya et al.\, Phys. Rev. C 98\, 044316 (2018).\n[5] L. Coraggio\, A. Co
 vello\, A. Gargano\, and N. Itaco\, Phys. Rev. C 87\, 034309 (2013).\n[6] 
 Y. H. Kim et al.\, Eur. Phys. J. A 53\, 162 (2017).\n[7] R. Banik et al.\,
  Phys. Rev. C 102\, 044329 (2020)\n\nhttps://indico.tlabs.ac.za/event/101/
 contributions/1935/
LOCATION:
URL:https://indico.tlabs.ac.za/event/101/contributions/1935/
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