Triple correlations in multiple gamma cascades in ³⁶Ar

Nuclear spectroscopic information for experimentally investigated nuclides of mass 36 (Mg, Al, Si, P, S, Cl, Ar, K, Ca) 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. The ³⁶Na has been looked for but not yet experimentally detected. There are no data available for the excited states in ³⁶Al, and for ³⁶Mg and ³⁶Ca, only one excited state is known.

The elastic and inelastic scattering of protons from ³⁶Ar has been investigated from 2.1 to 5.3 MeV using a gas target. Experimental energy resolution varied from 11 keV to 5 keV over this range. The results are interpreted in terms of 56 states in ³⁷K between the energies of 4.0 and 7.0 MeV excitation with the aid of single-level dispersion theory. The width and spin and parity or proton l-value are determined for the 38 states seen in the elastic scattering. Upper limits are placed on the total widths of levels seen only in the inelastic scattering.