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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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