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Title: First-order theories for adiabatic L-shell ionization by protons
Authors: Smit, Z.
Orlić, I. 
Issue Date: 1994
Citation: Smit, Z., Orlić, I. (1994). First-order theories for adiabatic L-shell ionization by protons. Physical Review A 50 (2) : 1301-1308. ScholarBank@NUS Repository.
Abstract: L-shell ionization cross sections, evaluated as mean values of the experimental data, were compared with the first-order theoretical values obtained by the plane-wave Born and semiclassical method. Hydrogenic Dirac wave functions in the united-atom limit were employed in the calculation. The plane-wave Born approximation cross sections with Dirac-Hartree-Slater wave functions were obtained from the tables of Chen and Crasemann [At. Data Nucl. Data Tables 33, 217 (1985); 41, 257 (1989)]. The agreement between the experimental and semiclassical cross sections was generally better than 20%, except for the L1 subshell of heavy elements and for the very adiabatic region of L2,3 subshells. The differences between both sets of data were largely reproduced by a simplified coupled-channel calculation performed nonrelativistically for a single final state. The calculation also suggests that, due to the uncertainties of the fluorescence yields, the ionization cross sections deduced from the measured data are overestimated by 10%. © 1994 The American Physical Society.
Source Title: Physical Review A
ISSN: 10502947
DOI: 10.1103/PhysRevA.50.1301
Appears in Collections:Staff Publications

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