Investigation of 36Ar with the 35Cl(p, γ)36Ar reaction: (II). Angular distributions and shell model calculations

The angular distributions of primary and secondary γ-ray transitions at eight resonances in the ³⁵Cl(p,γ)³⁶Ar reaction have been measured with a 60 cm³ Ge(Li) detector. The measurements lead to unambiguous J^gp assignments for 17 states of ³⁶Ar and to J^π limitations for seven other states. A large number of γ-ray multipole mixing ratios were obtained. Many of the resonances are analogues of ³⁶Cl levels. The lifetime of the E_x = 6.36 MeV level has been determined as τ_m = 440 +-150 fs. A simple shell model calculation has been performed to study the odd-parity levels of ³⁶Ar and ³⁶Cl. Coulomb displacement energies have been computed. Spectroscopic factors have been calculated and compared with the experimental data for the ³⁵Cl(d, p)³⁶Cl and ³⁵(τ, d)³⁶ reactions.