#### Abstract

The properties of the low-lying states of the argon isotopes ${}_{18}{}^{39}{}_{}{}^{}\mathrm{Ar}_{21}^{}{}_{}{}^{}$, ${}_{18}{}^{40}{}_{}{}^{}\mathrm{Ar}_{22}^{}{}_{}{}^{}$, ${}_{18}{}^{41}{}_{}{}^{}\mathrm{Ar}_{23}^{}{}_{}{}^{}$, and ${}_{18}{}^{42}{}_{}{}^{}\mathrm{Ar}_{24}^{}{}_{}{}^{}$ are predicted by use of both the ${\left(\pi {d}_{\frac{3}{2}}\right)}^{-2\mathrm{}}{\left(\nu {f}_{\frac{7}{2}}\right)}^{n}$ model and the extended ${\left(\pi {d}_{\frac{3}{2}}\right)}^{-2\mathrm{}}{(\nu {f}_{\frac{7}{2}},\nu {p}_{\frac{3}{2}})}^{n}$ description. The $n-n$, $p-p$, and $n-p$ interactions are taken from data on neighboring nuclei. With the extended model, reasonable agreement with experiment is obtained for the spectra. $E2\mathrm{}$ and $M1\mathrm{}$ transitions rates are examined. All $M1\mathrm{}$ transitions are predicted to be substantially inhibited, as is observed experimentally. Several experiments are suggested.

DOI: http://dx.doi.org/10.1103/PhysRevC.7.1913

- Received 22 January 1973
- Published in the issue dated May 1973

© 1973 The American Physical Society