Identification of significant E0 strength in the 22+→21+ transitions of 58,60,62Ni

• DOI: 10.1016/j.physletb.2018.01.076
• Publication Date: 2018-02-21T13:55:34Z
• Authors: L.J. Evitts; A.B. Garnsworthy; T. Kibédi; J. Smallcombe; M.W. Reed; B.A. Brown; A.E. Stuchbery; G.J. Lane; T.K. Eriksen; A. Akber; B. Alshahrani; M. de Vries; M.S.M. Gerathy; J.D. Holt; B.Q. Lee; B.P. McCormick; A.J. Mitchell; M. Moukaddam; S. Mukhopadhyay; N. Palalani; T. Palazzo; E.E. Peters; A.P.D. Ramirez; S.R. Stroberg; T. Tornyi; S.W. Yates
• Keywords: Physics; QC1-999; 0103 physical sciences; 01 natural sciences

The $E0$ transition strength in the $2^+_2 \rightarrow 2^+_1$ transitions of $^{58,60,62}$Ni have been determined for first time following a series measurements at Australian National University (ANU) and Kentucky (UK). CAESAR Compton-suppressed HPGe array Super-e solenoid ANU were used to measure $δ(E2/M1)$ mixing ratio internal conversion coefficient each inelastic proton scattering. Level half-lives, ratios $γ$-ray branching measured UK neutron new spectroscopic information was determine strengths. These are $2^+ 2^+$ strengths nuclei with spherical ground states component is found be unexpectedly large; fact, these amongst largest medium heavy reported date.