Reactions of Nickel with Alpha-Particles

概要

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Excitation functions for the alpha-particle induced reactions on Ni^<58>, Ni^<60>, Ni^<61>, Ni^<62> and Ni^<64> have been measured at incident energies up to 40Mev. The sum of the measured cross sections for Ni^<58> appears to agree with the total reaction cross section calculated from the continuum theory for γ_0 = 1.7 × 10^<-18>cm. The sum almost agrees with the optical-model analysis of reaction cross section for alpha-particles by Igo, but his prediction seems to give a little higher value. In the excitation function for the (α, αn) reaction on Ni^<58>, there is a small "knee" immediately after the effective threshold (around 23Mev). The alpha-particle reactions on Ni^<60> have been compared with the proton reactions on Cu^<63>, the compound nucleus Zn^<64> being the same for two cases. The prediction from the compound nucleus theory seems to hold roughly, and it seems inadequate to discuss strictly whether the discrepancy in energy is significant. The same is observed in the comparison between the alpha-particle reactions on Ni^<62> and the proton reactions on Cu^<65>.
社団法人日本物理学会の論文
1960-12-05