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

吕牛; 常宏伟; 张艳萍; 徐进章; 杜树斌

doi:10.7538/yzk.2011.45.03.0257

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

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

计量
- 文章访问数: 997
- HTML全文浏览量: 0
- PDF下载量: 1333
出版历程
- 收稿日期: 1899-12-31
- 修回日期: 1899-12-31
- 刊出日期: 2011-03-19

Measurement of L-Shell X-ray Production Cross Section of Pb by Fluorine Ion Bombardment

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

摘要

摘要: 实验测量了20～50 MeV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（L_l）、σ(L_α)、σ（L_β）、σ（L_γ）和σ（L_tot）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（L_l）、σ(L_α)、σ（L_β）、σ（L_γ）、σ（L_tot）实验测量值与PWBA理论计算值差别很大，ECPSSR理论计算值与σ(L_α)实验值符合很好，与σ（L_l)、σ（L_β）的实验值差别较小，但与σ（L_γ）的实验值差别较大。
- L壳层X射线 ,
- 产生截面 ,
- 平面波波恩近似理论 ,
- ECPSSR理论
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 experimental results. It shows that reasonable agreement between theory and experiment is observed, and the ECPSSR theory is closer to the experiment.
- L-shell X-ray ,
- production cross section ,
- plane-wave Born approximation theory ,
- ECPSSR theory

HTML全文

参考文献(12)

[1]	KAGANOVICH I D. Ionization cross sections for ion-atom collisions in high energy ion beams[J]. Nucl Instrum Methods Phy Rev A, 2005, 544: 91-97.
[2]	LAPICKI G. Cross sections for K-shell X-ray production by hydrogen and helium ions in elements from beryllium to uranium[J]. J Phys Chem Ref Data, 1989, 18: 111-218.
[3]	PAUL H, SACHER J. Fitted empirical reference cross sections for K-shell ionization by prontons[J]. At Data Nucl Data Tables, 1989, 42: 105-156.
[4]	SOKHI R S, CRUMPTON D. Experimental L-shell X-ray production and ionization cross sections for proton impact[J]. At Data Nucl Data Tables, 1984, 30: 49-124.
[5]	SINGH Y P, MITRA D, TRIBEDI L C, et al. L-subshell ionization of Bi, Au, and Yb induced by F ions at intermediate velocities[J]. Phys Rev A, 2000, 63: 012713.
[6]	田野，杨治虎，张艳萍，等. 氟离子碰撞引起的钽L壳层X射线产生截面测量[J]. 原子能科学技术，2009，43（5）：406-411. TIAN Ye, YANG Zhihu, ZHANG Yanping, et al. Measurement of L-shell X-ray production cross section of tantalum by 20-55 MeV fluorineion bombardent[J]. Atomic Energy Science and Technology, 2009, 43(5): 406-411(in Chinese).
[7]	CAMPBELL J H. Relativisitic Hartree-Slater values for K and L-ray emission rates[J]. At Data Nucl Data Tables, 2003, 85: 291-315.
[8]	CAMPBELL J L, WANG J X. Interpolated Dirac-Fock values of L-subshell X-ray emission rates including overlap and exchange effects[J]. At Data Nucl Data Tables, 1989, 43: 281-291.
[9]	LIU Z. A program for calculating K-, L- and M-shell cross section from ECPSSR theory using a personal computer [J]. Comp Phys Commun,1996, 97: 315-330.
[10]	SARKADI L, MUKOYAMA T. Higher order processes in Lshell ionization[J]. J Phys B, 1981, 14: L255.
[11]	LAPICKI G, RAMANAMURTY G A V. Effects of multiple ionization and intrashell coupling in L-subshell ionization by heavy ions[J]. Phys Rev A, 2004, 70: 062718.
[12]	ANDREWS M C, MCDANIEL F D. L- and M-shell X-ray production cross section of Nd, Gd, Ho, Yb, Au, and Pb by 25 MeV carbon and 32 MeV oxygen ions[J]. Phys Rev A, 1987, 36: 3 699-3 706.

施引文献

资源附件(0)

计量

文章访问数: 997
HTML全文浏览量: 0
PDF下载量: 1333
被引次数: 0

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

计量

出版历程

Measurement of L-Shell X-ray Production Cross Section of Pb by Fluorine Ion Bombardment

计量

出版历程

目录