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


BENZONI G., MORALES A. I., WATANABE H., NISHIMURA S., CORAGGIO L., ITACO N., ...More

PHYSICS LETTERS B, vol.751, pp.107-112, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 751
  • Publication Date: 2015
  • Doi Number: 10.1016/j.physletb.2015.10.025
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.107-112
  • Istanbul University Affiliated: Yes

Abstract

The beta decays Mn-68 -> Fe-68 -> Mn-69 -> Fe-69 and Mn-70 -> Fe-70 have been measured at the RIBF facility at RIKEN using the EURICA gamma spectrometer combined with an active stopper consisting of a stack of Si detectors. The nuclei were produced as fission fragments from a beam of U-238 at a bombarding energy of (345) MeV/nucleon impinging on a Be target and selected using the BigRIPS separator. Half-lives and beta-delayed neutron emission probabilities have been extracted for these decays, together with first experimental information on excited states populated in Fe-69,Fe-70. 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 nu 1d(5/2) and nu 0g(9/2) orbitals and the monopole component of the pi 0f(7/2)-nu 0f(5/2) interaction. (C) 2015 The Authors. Published by Elsevier B.V.