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Semiempirical Formulas for the K-Shell Photoionization Cross Sections for Gamma Rays in the 150- to 1300-keV Energy Range

C. Ranganathaiah, T. K. Umesh, B. Sanjeevaiah

Nuclear Science and Engineering

Volume 90 / Number 1 / May 1985 / Pages 99-102


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Simple semiempirical formulas for K-shell photoionization cross sections for gamma rays have been obtained based on the experimental results of coincidence and direct measurements. The data used cover the energy region from 145.4 to 1332.5 keV and atomic number Z from 29 to 90. Results obtained from these formulas agree fairly well with Scofield's theoretical results.

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