The ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$,${}_{}{}^6{}_{}{}^{}\mathrm{He}$)${}_{}{}^{33}{}_{}{}^{}\mathrm{Ar}$ reaction has been used to measure the mass excess of the ground state and of the first two excited states of ${}_{}{}^{33}{}_{}{}^{}\mathrm{Ar}$. The coefficients of the isobaric-mass-multiplet equation are calculated for the three new isobaric spin quartets which are completed by the present results.

[NUCLEAR REACTIONS ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$,${}_{}{}^6{}_{}{}^{}\mathrm{He}$), $E=70\mathrm{}$ MeV, measured $Q$, deduced mass excess of ${}_{}{}^{33}{}_{}{}^{}\mathrm{Ar}$.]

• Received 22 January 1974

DOI:https://doi.org/10.1103/PhysRevC.9.1848