Nuclear Structure and Decay Data for A=62 Isobars

Experimental nuclear spectroscopic data are evaluated for 12 known nuclides of mass number A=62 (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge). Detailed evaluated information are presented for each reaction and decay. Recommended values combining all available data are provided for all the spectroscopic properties of each level, γ-ray, and decay radiation. Following is the status of structure and decay information available for each of the nuclides. 62Sc: only the isotopic identification has been made, with unknown half-life of its g.s., and its decay scheme. 62Ti: half-life of the g.s. is unknown, but the first (2+) and (4+) states have been reported, the second at 1506 keV. 62V: information is available for only the ground state, its decay scheme is poorly known, with three γ rays, and one level in 62Cr. 62Cr: only three excited states are known up to 1458 keV, with half-life of one excited state. Its decay scheme is poorly known, with five γ rays and three levels in the daughter nucleus. 62Mn: two beta-decaying activities are known, but with poorly known decay schemes. Ten excited states are known up to 1531 keV, and up to J=(8), but with no half-life known for any of the excited states. 62Fe: 23 excited states are known up to 5475 keV, and up to 10+, with the half-lives known for only the first 2+ and 4+ states. Its decay scheme is poorly known with only one γ ray and one level in 62Co. 62Co: two beta-decaying activities are known, with their decay decay schemes fairly well established. Large number of levels are up to 6950 keV, and up to (13+), but half-lives of only two excited states are known. 62Ni: stable nucleus with a large number of levels known up to 24.5 MeV excitation, and up to (24−). Half-lives of 30 excited states are known. 62Cu: a large number of levels are known up to 10.9 MeV excitation, and up to (14+), but half-lives known for only seven excited states. Its decay scheme is fairly well established. 62Zn: a rare nucleus with co-existence of many different types of structures: five superdeformed bands, 11 well-deformed bands, two terminating bands, and nine normal-deformed bands, up to an excitation energy of 42.5 MeV, and up to (35−), with half-lives known for 18 excited states. Its decay scheme is well established. 62Ga: many levels are known up to 16.8 MeV excitation, and up to (21+), but half-life of only one excited state is known. Its decay scheme is of special interest due to superallowed decay to 62Zn, and has been intensively pursued in recent works. 62Ge: only two possible excited states have been suggested up to 2285 keV, with no knowledge of their Jπ values. Its decay scheme to 62Ga is fairly well known, with probable involvement of a superallowed decay. 62As: this nuclide has not been investigated, it is included only for completeness. 62Se: experimental search for this nuclide by 2016Bl05 did not yield any events, implying that this nucleus is likely unbound towards two-proton emission as theoretical S(2p)=−3290 keV (2019Mo01). This work supersedes data in earlier ENSDF evaluation of A=62 nuclei by 2012Ni08.