Physics Letters B (Dec 2015)

Decay properties of 68,69,70Mn: Probing collectivity up to N=44 in Fe isotopic chain

  • G. Benzoni,
  • A.I. Morales,
  • H. Watanabe,
  • S. Nishimura,
  • L. Coraggio,
  • N. Itaco,
  • A. Gargano,
  • F. Browne,
  • R. Daido,
  • P. Doornenbal,
  • Y. Fang,
  • G. Lorusso,
  • Z. Patel,
  • S. Rice,
  • L. Sinclair,
  • P.-A. Söderström,
  • T. Sumikama,
  • J. Wu,
  • Z.Y. Xu,
  • R. Yokoyama,
  • H. Baba,
  • R. Avigo,
  • F.L. Bello Garrote,
  • N. Blasi,
  • A. Bracco,
  • F. Camera,
  • S. Ceruti,
  • F.C.L. Crespi,
  • G. de Angelis,
  • M.-C. Delattre,
  • Zs. Dombradi,
  • A. Gottardo,
  • T. Isobe,
  • I. Kuti,
  • K. Matsui,
  • B. Melon,
  • D. Mengoni,
  • T. Miyazaki,
  • V. Modamio-Hoybjor,
  • S. Momiyama,
  • D.R. Napoli,
  • M. Niikura,
  • R. Orlandi,
  • H. Sakurai,
  • E. Sahin,
  • D. Sohler,
  • R. Taniuchi,
  • J. Taprogge,
  • Zs. Vajta,
  • J.J. Valiente-Dobón,
  • O. Wieland,
  • M. Yalcinkaya

DOI
https://doi.org/10.1016/j.physletb.2015.10.025
Journal volume & issue
Vol. 751, no. C
pp. 107 – 112

Abstract

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The β decays Mn68→Fe68, Mn69→Fe69 and Mn70→Fe70 have been measured at the RIBF facility at RIKEN using the EURICA γ spectrometer combined with an active stopper consisting of a stack of Si detectors. The nuclei were produced as fission fragments from a beam of 238U at a bombarding energy of 345 MeV/nucleon impinging on a Be target and selected using the BigRIPS separator. Half-lives and β-delayed neutron emission probabilities have been extracted for these decays, together with first experimental information on excited states populated in 69,70Fe. The data indicate a continuously increasing deformation for Fe isotopes up to A=70. This is interpreted, as for Cr isotopes, in terms of the interplay between the quadrupole correlations of the ν1d5/2 and ν0g9/2 orbitals and the monopole component of the π0f7/2–ν0f5/2 interaction.