The effect of gamma-ray competition in statistical-model calculations of isomer yield ratios

摘要: Abstract The distributions in angular momentum the formation of compound nuclei 4 He ion bombardments and their de-excitation by particle or gamma-ray emission were investigated a compound-statistical model calculation excitation functions evaporation spectra. was performed Monte Carlo technique from reaction products, isomer yield ratios calculated compared with experiment. importance competition is discussed detail. It shown that effect preferred population higher states (α, n) product over for 2n), termed “spin fractionation”, depends critically on strength competition. Agreement experimental obtained parameters which are consistent predictions Fermi gas give agreement between functions.