103Rh(α, xn) 107− xAg reactions

Abstract

Excitation functions have been measured for the yields of Ag isotopes in the reactions 103Rh(α, xn) 107− x Ag for x = 1−5. The results are consistent with a combination of compound nucleus and pre-equilibrium mechanisms. The low values of experimental isomer ratios [(high spin)/(low spin) measured x = 1, 3 and 5 only)] compared to theoretical predictions indicate that a considerable fraction of nuclei are by-passing the high-spin isomer to populate the low-spin state. This fraction has been estimated as 27.5% for the (α, n) reaction, 16.7% for the (α,3 n) reaction and 18.2% for the (α, 5 n) reaction.