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氟离子碰撞引起铅原子L壳层X射线产生截面的实验测量
引用本文:吕牛,常宏伟,张艳萍,徐进章,杜树斌.氟离子碰撞引起铅原子L壳层X射线产生截面的实验测量[J].原子能科学技术,2011,45(3):257-261.
作者姓名:吕牛  常宏伟  张艳萍  徐进章  杜树斌
作者单位:1.兰州大学 ;核科学与技术学院,甘肃 ;兰州730000;2.中国原子能科学研究院 ;核数据重点实验室,北京102413
摘    要:实验测量了20~50MeV的F离子碰撞Pb原子产生的L壳层X射线,研究了Pb的L各支壳层X射线产生截面σ(Ll)、σ(Lα)、σ(Lβ)、σ(Lγ)和σ(Ltot)与入射离子能量的关系。结果显示:在本能区范围内,Pb原子发射L壳层X射线产生截面随入射离子能量的增加而增加。利用L壳层的辐射跃迁几率、Coster Kronig跃迁率和L亚壳层的荧光产额将平面波波恩近似(PWBA)和ECPSSR理论计算的电离截面转换为L层X射线产生截面,并与实验结果相比较。结果表明,σ(Ll)、σ(Lα)、σ(Lβ)、σ(Lγ)、σ(Ltot)实验测量值与PWBA理论计算值差别很大,ECPSSR理论计算值与σ(Lα)实验值符合很好,与σ(Ll)、σ(Lβ)的实验值差别较小,但与σ(Lγ)的实验值差别较大。

关 键 词:L壳层X射线    产生截面    平面波波恩近似理论    ECPSSR理论

Measurement of L-Shell X-ray Production Cross Section of Pb by Fluorine Ion Bombardment
L Niu,CHANG Hong-we,ZHANG Yan-ping,XU Jin-zhang,DU Shu-bin.Measurement of L-Shell X-ray Production Cross Section of Pb by Fluorine Ion Bombardment[J].Atomic Energy Science and Technology,2011,45(3):257-261.
Authors:L Niu  CHANG Hong-we  ZHANG Yan-ping  XU Jin-zhang  DU Shu-bin
Affiliation:1.School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;2.China Institute of Atomic Energy, P. O. Box 275-49, Beijing 102413, China
Abstract:Production cross section of Pb L-shell X-ray induced by 20-50 MeV F5+ ion was measured,and the relationship of X-ray production cross section and impact ion energy was represented.At the same time,inner-shell ionization cross sections given by plane-wave Born approximation(PWBA) theory and the ECPSSR theory were transformed to L-subshell X-ray production cross section by using radiative transition probability,Coster-Kronig transition probability and fluorescence yield.The results were compared with the expe...
Keywords:L-shell X-ray  production cross section  plane-wave Born approximation theory  ECPSSR theory  
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