Ionization cross sections of the L subshells of Au by 50 to 100 keV electron impact

被引：17

作者：

Barros, S. F. ^{[1
]}

Vanin, V. R. ^{[1
]}

Maidana, N. L. ^{[1
]}

Fernandez-Varea, J. M. ^{[1
,2
,3
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, SP, Brazil

[2] Univ Barcelona, Facultat Fis, ECM, E-08028 Barcelona, Spain

[3] Univ Barcelona, ICC, E-08028 Barcelona, Spain

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2015年 / 48卷 / 17期

基金：

巴西圣保罗研究基金会;

关键词：

atomic L subshells; electron-impact ionization; distorted-wave Born approximation; X-RAY-EMISSION; INNER-SHELL IONIZATION; ANGULAR-DISTRIBUTION; NEUTRAL ATOMS; FOCK VALUES; ENERGIES; BREMSSTRAHLUNG; DISTRIBUTIONS; CALIBRATION; DETECTORS;

D O I：

10.1088/0953-4075/48/17/175201

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have measured the L alpha, L beta, L gamma(1), L gamma(2), L gamma(3), Ll and L eta x-ray production cross sections of Au by 50-100 keV electron impact. From this experimental information we derived the L-1, L-2 and L-3 subshell ionization cross sections with a novel analysis procedure that is based on an overdetermined system of equations and achieve the estimates by the least-squares method. The uncertainties in the atomic relaxation parameters needed to transform the x-ray intensities to ionization cross sections impose a lower limit to the relative standard deviations of the L subshell ionization cross sections, which is found to be 5-10% depending on the selected set of relaxation parameters. Our experimental results are in reasonable accord with most of the measurements carried out by other authors, and they agree with the predictions of the semi-relativistic distorted-wave Born approximation.

引用

页数：12

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