Nuclear Structure and Decay Data for A=33 Isobars

Abstract

Experimental structure and decay data are evaluated for eight known nuclides of mass number A=33 (Na, Mg, Al, Si, P, S, Cl, Ar). Experimental studies for the identification of other three nuclides: ³³F, ³³Ne and ³³K by 2019Ah07, 2007Ba71, and 1986La17, respectively, have not met with success, and values of S(2n) for ³³F, S(n) for ³³Ne and S(p) for ³³K from systematics (2021Wa16) and theoretical calculations (2019Mo01) suggest that these nuclei are likely unbound towards particle emission. Detailed evaluated level properties and related information are presented and recommended spectroscopic parameters are provided, combining all the data from various reactions and decays. Information for excited states in ³³Na is limited and the spin of ³³Al g.s. still has not been determined unambiguously. The radioactive decay schemes of ³³Na, ³³Mg, ³³Al and ³³Si remain incomplete. The ³³S nuclide is the most extensively studied from many different reactions and decays, followed by ³³Cl and ³³P. This work supersedes earlier full evaluations of A=33 published by 2011Ch49, 1990En08 (also 1998En04 update) and 1978En02.