| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1852587 | Physics Letters B | 2015 | 6 Pages |
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=70A=70. This is interpreted, as for Cr isotopes, in terms of the interplay between the quadrupole correlations of the ν1d5/2ν1d5/2 and ν0g9/2ν0g9/2 orbitals and the monopole component of the π0f7/2–ν0f5/2π0f7/2–ν0f5/2 interaction.
