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

作者：Benzoni G^*; Morales A I; Watanabe H; Nishimura S; Coraggio L; Itaco N; Gargano A; Browne F; Daido R; Doornenbal P; Fang Y; Lorusso G; Patel Z; Rice S; Sinclair L; Soederstroem P A; Sumikama T; Wu J; Xu Z Y; Yokoyama R; Baba H; Avigo R; Garrote F L Bello; Blasi N; Bracco A; Camera F; Ceruti S; Crespi F C L; de Angelis G; Delattre M C; Dombradi Zs; Gottardo A; Isobe T; Kuti I; Matsui K; Melon B; Mengoni D

来源：Physics Letters B, 2015, 751: 107-112.

DOI：10.1016/j.physletb.2015.10.025

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.

• 出版日期2015-12-17
• 单位RIKEN; 北京航空航天大学