Beta Decay Studies Of Neutron‐Rich Nuclides Near N = 32

We report on the low‐energy structure of the neutron‐rich, even‐even nuclides 54Ti32, 56Cr32, and 58Cr34 studied via β‐delayed γ‐ray spectroscopy. The systematic variation of the excitation energy of first excited 2+ states in the even‐even 24Cr and 22Ti isotopes provides evidence of a subshell closure at N = 32 for neutron‐rich nuclides having Z ⩽ 24. Shell model calculations, which correctly account for the appearance of the N = 32 subshell, also predict a new shell closure at N = 34 for Ti and Ca isotopes.