K X-ray production by 3-4 MeV proton impact on selected lanthanoids

被引：5

作者：

Reyes-Herrera, J. ^{[1
]}

Miranda, J. ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico

来源：

RADIATION PHYSICS AND CHEMISTRY | 2010年 / 79卷 / 10期

关键词：

Ionization cross sections; X-rays; Lanthanoids; PIXE; IONIZATION CROSS-SECTIONS; RARE-EARTH-ELEMENTS; SHELL IONIZATION; PROGRAM; IONS;

D O I：

10.1016/j.radphyschem.2010.05.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Measurements of K-shell X-ray production cross sections induced by proton beams with energies between 3 MeV and 4 MeV are presented. The studied elements were Ce, Nd, Gd, Dy, and Ho, as thick targets. The measured cross sections are evaluated through comparisons with the ECPSSR model, the eECPSShsR-UA theory, the adiabatic perturbation (also known as direct molecular orbital, or MO) theory, and the empirical fits of Kahoul et al. using a scaling based on the reduced velocity parameter xi(R)(K) in every case. Consideration is given to multiple ionization effects and electron capture contribution to K-shell ionization. It is shown that the experimental results are in good agreement with the theoretical predictions in the whole measured xi(R)(K) range. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1013 / 1017

页数：5

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