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Nuclear structure towards N = 40 60Ca: in-beam γ-ray spectroscopy of 58,60Ti.

  • Author(s): Gade, A
  • Janssens, RVF
  • Weisshaar, D
  • Brown, BA
  • Lunderberg, E
  • Albers, M
  • Bader, VM
  • Baugher, T
  • Bazin, D
  • Berryman, JS
  • Campbell, CM
  • Carpenter, MP
  • Chiara, CJ
  • Crawford, HL
  • Cromaz, M
  • Garg, U
  • Hoffman, CR
  • Kondev, FG
  • Langer, C
  • Lauritsen, T
  • Lee, IY
  • Lenzi, SM
  • Matta, JT
  • Nowacki, F
  • Recchia, F
  • Sieja, K
  • Stroberg, SR
  • Tostevin, JA
  • Williams, SJ
  • Wimmer, K
  • Zhu, S
  • et al.
Abstract

Excited states in the neutron-rich N = 38, 36 nuclei (60)Ti and (58)Ti were populated in nucleon-removal reactions from (61)V projectiles at 90 MeV/nucleon. The γ-ray transitions from such states in these Ti isotopes were detected with the advanced γ-ray tracking array GRETINA and were corrected event by event for large Doppler shifts (v/c ∼ 0.4) using the γ-ray interaction points deduced from online signal decomposition. The new data indicate that a steep decrease in quadrupole collectivity occurs when moving from neutron-rich N = 36, 38 Fe and Cr toward the Ti and Ca isotones. In fact, (58,60)Ti provide some of the most neutron-rich benchmarks accessible today for calculations attempting to determine the structure of the potentially doubly magic nucleus (60)Ca.

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