Electron-pair creation on the uranium nucleus

From measurements of the total-absorption cross section for photon energies between 3-38 MeV values of the cross section for pair creation on the exp 238 uranium nucleus were obtained. Theoretical values of the distorted-wave Born cross section for pair creation are available at 10 and 20 MeV. These...

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Bibliographic Details
Published in:Physical review letters 1985-04, Vol.54 (15), p.1649-1651
Main Authors: Sherman, NK, Davidson, WF, Nowak, A, Kosaki, M, Roy, J, Delbianco, W, Kajrys, G
Format: Article
Language:English
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Summary:From measurements of the total-absorption cross section for photon energies between 3-38 MeV values of the cross section for pair creation on the exp 238 uranium nucleus were obtained. Theoretical values of the distorted-wave Born cross section for pair creation are available at 10 and 20 MeV. These, modified by radiative and screening corrections, are compared with sigma sub kappa obtained from the experiment. The agreement is within approx 1% at 20 MeV. However, at 10 MeV the theoretical value is approx 4% to small. The calculations likely can be improved by taking into account the finite size of the nucleus. 10 ref.--AA
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.54.1649