Sm原子精细结构能级的理论分析

doi:10.7523/j.issn.2095-6134.2017.01.003

中国科学院大学学报 ›› 2017, Vol. 34 ›› Issue (1): 15-22.DOI: 10.7523/j.issn.2095-6134.2017.01.003

Sm原子精细结构能级的理论分析

刘忠新, 马玉龙, 周福阳, 屈一至

中国科学院大学材料科学与光电技术学院, 北京 100049

收稿日期:2016-04-14 修回日期:2016-05-16 发布日期:2017-01-15
通讯作者: 屈一至,E-mail:yzqu@ucas.ac.cn
基金资助:
国家自然科学基金（U1330117）资助

Theoretical analysis of energy levels for the fine structure of Sm I

LIU Zhongxin, MA Yulong, ZHOU Fuyang, QU Yizhi

College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-04-14 Revised:2016-05-16 Published:2017-01-15

摘要/Abstract

摘要：

根据非相对论加相对论修正的原子能量表达式，结合实验能级拟合方法计算Sm原子的精细结构能级。对于基组态[Xe]4f⁶6s²的能级，通过对比不同拟合计算结果与实验值，得到各参量对能级的影响规律。对于奇宇称组态4f⁶6s6p+4f⁵5d6s²的能级，利用22条实验能级，得到134条已知能级较精确的拟合计算值。对于偶宇称组态4f⁶6s²+4f⁶5d6s+4f⁶6s7s的能级，利用17条实验能级，得到65条已知能级较精确的计算值。最后，标识了5条高激发态偶宇称4f⁶（⁷F）6s7s⁵F_J（J=1~5）谱项能级。

关键词: Sm原子, 精细结构能级, 拟合计算方法

Abstract:

In this work, the fine structure of Sm I was calculated with the experimental fitting method, which is based on the non-relativistic atomic energy expressions with the relativistic correction. For the ground configuration[Xe]4f⁶6s², the results of different fitting procedures are compared with the experimental data, and the effects of various parameters on the energy levels are analyzed. For odd parity configurations 4f⁶6s6p+4f⁵5d6s², the 134 accurate known energy levels are obtained by using 22 fitted experimental energy levels. For even parity configurations 4f⁶6s²+4f⁶5d6s+4f⁶6s7s, the 65 accurate known energy levels are obtained by using 17 fitted experimental data. Five high-lying levels are assigned to even-parity 4f⁶(⁷F)6s7s ⁵F_J(J=1-5).

Key words: Sm I, fine structure energy levels, fitting method

中图分类号:

0562.3+1

刘忠新, 马玉龙, 周福阳, 屈一至. Sm原子精细结构能级的理论分析[J]. 中国科学院大学学报, 2017, 34(1): 15-22.

LIU Zhongxin, MA Yulong, ZHOU Fuyang, QU Yizhi. Theoretical analysis of energy levels for the fine structure of Sm I[J]. , 2017, 34(1): 15-22.

参考文献

[1] Bünzli J C G. Lanthanide luminescence for biomedical analyses and imaging[J]. Chem Rev, 2010, 110(5):2729-2756.
[2] Kramida A, Ralchenko Yu, Reader J, et al. NIST atomic spectra database (ver. 5.2)[DB/OL]. Gaithersburg:NIST, 2014[2016-04-10]. http://physics.nist.gov/asd.
[3] Jia L, Jing C, Zhou Z, et al. Studies of high-lying even-parity levels of Sm:energies and isotope shifts[J]. J Opt Soc Am B, 1993, 10(8):1317-1320.
[4] Jayasekharan T, Razvi M A N, Bhale G L. Observation of new even-parity states of Sm I by resonance ionization mass spectrometry[J]. J Opt Soc Am B, 1996, 13(4):641-648.
[5] Jayasekharan T, Razvi M A N, Bhale G L. Investigations of new high-lying even-parity energy levels of the samarium atom below its first ionization limit[J]. J Opt Soc Am B, 2000, 17(9):1607-1615.
[6] Pulhani A K, Shah M L, Dev Vas, et al. High-lying even-parity excited levels of atomic samarium[J]. J Opt Soc Am B, 2005, 22(5):1117-1122.
[7] Qin W J, Dai C J, Xiao Y, et al. Experi-mental study of highly excited even-parity bound states of the Sm atom[J]. Chin Phys B, 2009, 18(8):3384-3394.
[8] Pulhani A K, Shah M L, Gupta G P, et al. Measurement of total angular momentum values of high-lying even-parity atomic states of samarium by spectrally resolved laser-induced fluorescence technique[J]. Pramana J Phys, 2010, 75(6):1135-10139.
[9] Li M, Dai C J, Xie J. Even-parity states of the Sm atom with stepwise excitation[J]. Chin Phys B, 2011, 20(6):063204.
[10] Li M, Dai C J, Xie J. Photoionization spectra of even-parity states of Sm atom with multistepexcitation[J]. Quant Spectrosc Radiat Transfer, 2011, 112(5):793-799.
[11] Zhao Y H, Dai C J, Ye S W. Study on even-parity highly excited states of the Sm atom[J]. J Phys B, 2011, 44(19):195001.
[12] Shah M L, Sahoo A C, Pulhani A K, et al. Investigations of high-lying even-parity energy levels of atomic samarium using simultaneous observation of two-color laser-induced fluorescence and photoionization signals[J]. Eur Phys J D, 2014, 68:235.
[13] 杨騄,戴长健,赵红艳. 用光电离技术探测钐原子的奇宇称束缚激发态的光谱[J].物理学报,2013,62(5):053201.
[14] Zhou F Y, Qu Y Z, Li J G, et al. Multi-configuration Dirac-Hartree-Fock calculations of excitation energies, oscillator strengths, and hyperfine structure constants for low-lying levels of Sm I[J]. Phys Rev A, 2015, 92(5):052505.
[15] Porsev S G. Calculation of lifetimes of low-lying odd-parity levels of Sm[J]. Phys Rev A, 1997, 56(5):3535-3542.
[16] Petit A. Fine structure parametric analysis of the f³ds²+f³d²s configurations in U I[J]. Eur Phys J D, 1999, 6(2):157-170.
[17] Stachowska E, Elantkowska M, Ruczkowski J. Reanalysis and semi-empirical predictions of the hyperfine structure of Eu I in the odd parity multi-configuration system[J]. Phys Scr, 2002, 65(3):237-247.
[18] Cowan R D. The theory of aomic structure and spectra[M]. Los Angeles:University of California Press, 1981.
[19] Kramide A. A version of Cowan code package adapted for personal computers[CP/OL].[2016-04-08]. http://das101.isan.troitsk.ru.
[20] Conway J G, Wybourne B G. Low-lying energy levels of lanthanide atoms and intermediate coupling[J]. Phys Rev, 1963, 130(6):2325-2332.
[21] Judd B R, Lindgren I. Theory of zeeman effect in the ground multiplets of rare-earth atoms[J]. Phys Rev, 1961, 122(6):1802-1812.
[22] Carlier P A, Blaise J, Schweighofer M G.Étude des configurations impaires 4f⁶6s6p et 4f⁵5d6s² de Sm I[J]. J Phys (Paris), 1968, 29(8/9):729-738.
[23] 赵红艳. Sm原子束缚态和自电离态的光谱及其特征.天津:天津理工大学,2011.

Sm原子精细结构能级的理论分析

Theoretical analysis of energy levels for the fine structure of Sm I

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价

访问统计

联系我们