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Relativistic calculation of atomic N-shell ionization by protons

Technical Report ·
OSTI ID:6925448
Relativistic plane-wave Born-approximation calculations of cross sections for N-shell ionization of Bi and U by protons with incident energies from 0.02 to 5 MeV are reported. The calculations were carried out by using Dirac-Hartree-Slater wave functions. Binding-energy change and Coulomb deflection were taken into account. The relativistic cross sections are compared with values from nonrelativistic Hartree-Slater wave functions to study the effects of relativity. A test calculation with hydrogenic wave functions yields very different results. The only available measurements (for W 74), revised with a corrected 4 d fluorescence yield, agree with present theoretical predictions for E/sub 0/ < or = 0.1 MeV, but fall below theory by a factor of 6 above E/sub 0/ = 0.4 MeV. This glaring discrepancy invites further investigation.
Research Organization:
Lawrence Livermore National Lab., CA (USA)
OSTI ID:
6925448
Report Number(s):
AD-A-174846/6/XAB
Country of Publication:
United States
Language:
English