Selectivity of directional correlations of gamma rays from oriented nuclear states at moderately high spins
Calculations are presented for pure-multipole cascades from an aligned initial state of moderately high spin. viz., 10. Pairs of detectors at vertices of an octant in space are used, and the question of selecting a particular assignment of spins and multipolarities from all others is investigated. It is found that for representative conditions of degree of alignment of initial state and quality of data, most of the cascades composed of combinations of dipole, quadrupole and octupole transitions can be distinguished from each other, even including in many cases the order of nonbasic transitions. The number of different cascades considered is 49. Also considered are cases simulating ultrahigh-precision data in order to illustrate principles, as well as quite low-precision data. Considered too, are cases of no alignment of initial spin, as well as the other extreme of only m = 0. A concise review of the results of the general theory of directional correlation of gamma rays from oriented initial states is given.