Inelastic scattering of protons by magnesium and aluminium

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Abstract

THE inelastic scattering of protons by some light elements has been investigated experimentally, using 4·5-MeV. Protons from the Cambridge cyclotron. The enengy spectrum of the scattered protons was determined by using a proportional counter in conjunction with absorbing foils. The experimental arrangement was similar to that used by Dicke and Marshall1, except that provision was made for observation of the scattered protons at angles betwafen 20° and 160° at 10° intervals. Only proton groups corresponding to excited states less than 2·9 MeV. above the ground-state were able to reach the counter. The resolving power was improved by a factor of four over that obtained by Dicke and Marshall by the simple expedient of rotating the scattering foil through 90° from the position adopted by them, which minimizes the effect of target thickness. Under these conditions the resolving power was about 250 keV. for inelastic groups of equal amplitude.

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RHODERICK, E. Inelastic scattering of protons by magnesium and aluminium. Nature 163, 848–849 (1949) doi:10.1038/163848a0

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