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SUMMARY:Shape coexistence in neutron deficient nuclei
DTSTART;VALUE=DATE-TIME:20260520T073000Z
DTEND;VALUE=DATE-TIME:20260520T080000Z
DTSTAMP;VALUE=DATE-TIME:20260624T134201Z
UID:indico-contribution-3831@indico.tlabs.ac.za
DESCRIPTION:Speakers: Philippos Papadakis (STFC Daresbury Laboratory)\nAcr
 oss the nuclear chart\, many interesting and diverse phenomena arise throu
 gh the interplay of single-particle motion\, nucleon pairing and collectiv
 ity. One such phenomenon\, known as shape coexistence\, is defined as the 
 presence of distinct nuclear shapes within the same nucleus and at similar
  energy [1]. Significant theoretical and experimental effort is taking pla
 ce to explore this phenomenon in different mass regions\, while it is sugg
 ested that it could manifest in most\, if not all nuclei [2].\n\nOne of th
 e more prominent regions where shape coexistence has been observed\, is in
  neutron-deficient nuclei close to the neutron mid-shell at N=104 and the 
 Z=82 magic number. A broad range of experimental approaches including lase
 r spectroscopy\, α-decay fine structure measurements\, in-beam γ-ray and
  conversion electron spectroscopy\, lifetime measurements and Coulomb exci
 tation experiments have been employed to study this phenomenon in detail.\
 n\nIn this presentation\, we will explore some of these techniques\, focus
 ing primarily on simultaneous in-beam γ-ray and conversion electron spect
 roscopy [3]\, that has been instrumental in recent years in the study of s
 hape coexistence in lead nuclei [4-8]. To demonstrate its effectiveness we
  will discuss some of the latest findings in particular in even-even lead 
 isotopes.\n\n[1] P. Garrett\, M. Zielinska and E. Clément\, Prog. Part. a
 nd Nucl. Phys. 124\, 103931 (2022).\n[2] K. Heyde and J.L. Wood\, Review o
 f Mod. Phys. 83\, 1467 (2011).\n[3] J. Pakarinen et al.\, Eur. Phys. J A 5
 0\, 53 (2014).\n[4] J. Ojala et al.\, Communication Physics 5:213 (2022).\
 n[5] P. Papadakis et al.\, Phys. Lett. B 858\, 139048 (2024).\n[6] A.M. Pl
 aza et al.\, Communication Physics 8:8 (2025).\n[7] J. Ojala et al.\, Phys
 . Lett. B 867\, 139601 (2025).\n[8] A.M. Plaza et al.\, Phys. Lett. B 870\
 , 139906 (2025).\n\nhttps://indico.tlabs.ac.za/event/139/contributions/383
 1/
LOCATION:NRF-iThemba LABS\, Old Faure Road\, Cape Town Auditorium
URL:https://indico.tlabs.ac.za/event/139/contributions/3831/
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