Lower Excited States ofCa42

Abstract

Weak gamma rays in the decay of ${\mathrm{K}}^{42}$ were investigated in order to give spin-party assignments for low-lying excited states of ${\mathrm{Ca}}^{42}$. The second excited state was found to be a $0^{+}$ state from directional correlation measurements and the third excited state has low spin value, probably $2^{+}$. Except for these two states the level sequence seems to be very much like that of ${\mathrm{Ti}}^{50}$ which has a similar configuration of two $f_{\frac{7}{2}}$ nucleons outside of a doubly magic core.