Levels inAs78,80,82from theSe78,80,82(t,He3) reactions

Levels of the neutron rich arsenic isotopes are studied by the Se($t$,${}_{}{}^3{}_{}{}^{}\mathrm{He}$) As reactions. In ${}_{}{}^{78}{}_{}{}^{}\mathrm{As}$, 33 levels up to $E_x=2383\mathrm{}$ keV are identified. In ${}_{}{}^{80,82}{}_{}{}^{}\mathrm{As}$ where no levels have previously been assigned, 18 and 9 levels respectively were observed. A mass excess of -72182±20 keV is obtained for ${}_{}{}^{80}{}_{}{}^{}\mathrm{As}$ which disagrees substantially with recent $\beta$-decay measurements. For ${}_{}{}^{82}{}_{}{}^{}\mathrm{As}$ the measured mass excess is -70067±27 keV which differs by 300 keV from previous measurements.