1969 Volume 42 Issue 4 Pages 981-984
Beryllium, boron, carbon, oxygen, and fluorine targets with natural isotopic compositions were irradiated by bremsstrahlung with four maximum energies, 30, 45, 55 and 60 MeV, and the yields of 7Be from each of these targets were determined by means of chemical separation and gamma-ray spectrometric measurements. The yields were obtained relative to the yield of the 12C(γ, n)11C reaction at each bremsstrahlung energy. The possible reaction pathways leading to the production of 7Be were discussed. The exponential decrease in the yield value against the difference in mass between the target and the product nuclei was observed.
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