Alpha Particles from the Interaction of 14.8-MeV Neutrons with Medium Weight Nuclei
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The angular and energy distributions of alpha particles resulting from V^<51>(η,α)Si^<48> and S^<32>(η,α)Si^<29> reactions induced by 14.8-Mev neutrons were measured with Ilford C2 nuclear plates. It was found that the angular distributions for the entire energy regions in the center-of-mass system are concave upward and approximately 90° symmetrical, and the energy distributions show that the alpha particles with energies below the Coulomb barrier are more emitted than expected. Also the curve on a semilog plot of the relative level density calculated from the energy distributions of the alpha particles fits a straight line which would correspond to Maxwellian distributions with the temperatures of about 0.9Mev for Sc and about 1.5Mev for Si. The total cross sections of V and S are 126mb±15% and 109mb±1% respectively. Experimental data on (η,α) reaction so far obtained by us are summarized and discussed in detail.
- 社団法人日本物理学会の論文
- 1958-04-05
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