Abstract
A method for estimating spins of highly excited nuclear states based on their gamma decay branching ratios is examined for sd and fp shell nuclei. Measures of similarity between emitting states have been made and a number of nuclei examined. Clear spin selectivity is observed in the spectrum similarities for resonant proton capture states in fp shell nuclei. In sd shell nuclei, the selectivity is weaker. The method of multidimensional scaling has been used to study the effect of spin on similarity using a large number of states of known spin in two test nuclei, 19F and 59Cu. Spin assignments are proposed for several resonances in 59Cu. Monte Carlo simulations were used to study factors influencing similarities and scaling configurations.
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