Nuclear Data Sheets for A = 32

Abstract

Nuclear spectroscopic information for experimentally investigated nuclides of mass 32 (Ne,Na,Mg,Al,Si, P,S,Cl,Ar) has been evaluated. The principal sources of the Adopted Levels presented for nuclides close to the stability line are Endtʼs evaluations (1990En08,1978En02). The data sets for reactions and decays, including all available gamma-ray data, are based mostly on the original literature. Except for the half-life of 32Ne decay, no other details about its decay characteristics are available. Structure data for 32Ne and 32Na are limited to only one excited state in each. The 32Mg nuclide is of central and prime relevance in the ‘island of inversion’ at or near N=20 semi-closed shell. The lifetime of only one excited state in 32Mg is known. The spin-parity assignments of several levels in this nucleus are not quite firm. The structure of 32Ar is limited to only one known state at low energy and two resonances in the giant-dipole excitation region. The 32P, 32S and 32Cl remain the most extensively studied nuclei through various reaction channels.