Level Structure of Ar41 from the Ar40(d, p)Ar41 Reaction

Abstract

The energy-level structure of ${\mathrm{Ar}}^{41}$ has been investigated by bombarding argon gas with 7.5-Mev deuterons and measuring the energy spectrum and angular distributions of the reaction protons. A $Q$ value of 3.874±0.006 Mev was measured. Fifty levels were observed, and their excitation energies, $l_n$ values, reduced widths, and shell-model configurations have been determined. Mean energies of the shell-model configurations were: $1f_{\frac{7}{2}}$, 0 Mev; $2p_{\frac{3}{2}}$, 1.50 Mev; $2p_{\frac{1}{2}}$, 3.53 Mev; $3s_{\frac{1}{2}}$, 4.78 Mev; $2d_{\frac{5}{2}}$, 4.86 Mev; and $1f_{\frac{5}{2}}$, 5.55 Mev.