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Semiempirical Formulas for Calculation of L-Subshell Ionization Cross Sections (CROSBI ID 197199)

Prilog u časopisu | izvorni znanstveni rad

Orlić, Ivica ; Sow, C.H. ; Tang, S.M. Semiempirical Formulas for Calculation of L-Subshell Ionization Cross Sections // International journal of PIXE, 4 (1994), 217-230. doi: 10.1142/S0129083594000258

Podaci o odgovornosti

Orlić, Ivica ; Sow, C.H. ; Tang, S.M.

engleski

Semiempirical Formulas for Calculation of L-Subshell Ionization Cross Sections

Presented are new parameters for the calculation of L subshell ionization cross sections for proton impact using a semiempirical expression. A similar paper was published by our group in early 1993 but the fitting parameters were obtained by using only 2295 experimental L shell cross section data. Since then a large number of experimental data have become available and therefore a new fitting has been performed employing more than 5000 data points. All available data were fitted separately for L1, L2 and L3 subshells. For targets with low atomic numbers (14≤Z≤42), only coefficients for Ltot were obtained. Because of the slight Z dependence of the universal function, data were also devised into five sub-groups according to their atomic numbers and fitted separately within each group for L1, L2 and L3 subshells. To extend the energy range of validity of the new fitting function theoretical values were used in the high energy region where experimental data were lacking. Results are compared with ECPSSR predictions and discussed.

L shell; ionization cross sections; parametrization; semiempirical fit

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Podaci o izdanju

4

1994.

217-230

objavljeno

0129-0835

10.1142/S0129083594000258

Povezanost rada

Fizika

Poveznice