Photoprotons from Magnesium
Physical Review1951Vol. 82(5), pp. 709–714
Abstract
The distributions in energy and in angle of the protons ejected from magnesium by the bremsstrahlung x-rays of a 24-Mev betatron have been observed in nuclear emulsions. Both normal magnesium and enriched ${\mathrm{Mg}}^{25}$ show a uniform angular distribution for all proton energies. The energy distribution of the protons from enriched ${\mathrm{Mg}}^{25}$ is compared to the distributions calculated from an evaporation process using various energy level densities. Good agreement is obtained using the known ${\mathrm{Na}}^{24}$ level densities. The integrated cross section of the ${\mathrm{Mg}}^{25}(\ensuremath{\gamma},p)$ reaction is determined as 0.056\ifmmode\pm\else\textpm\fi{}0.03 Mev-barn.
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