激光光谱法在光化学法同位素分离中的应用
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- 英文论文题名：The application of laser spectroscopy in photochemical isotope separation
- 论文作者：范凤英 ; 王立军 ; 瞿定荣 ; 宋增云
- 英文论文作者：FAN Feng-ying ; WANG Li-jun ; QU Ding-rong ; SONG Zeng-yun ; Department of Engineering Physics ; Tsinghua University
- 年：2015
- 作者机构：清华大学工程物理系;
- 论文关键词：激光同位素分离 ; 光化学法 ; 激光光谱法 ; 锂原子
- 英文论文关键词：laser isotope separation ; photochemical reaction ; laser spectroscopy ; lithium atoms
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第4册（同位素分离分卷）
- 语种：中文
- 分类号：O658
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：280k
- 原文格式：O
- 会议级别：全国
摘要
激光光谱法在光化学法同位素分离研究中起到非常重要的作用。本文采用中心波长固定的外腔可调谐半导体激光器作为光源,在弱激光作用下,通过激光吸收光谱和荧光发射光谱对锂同位素比率、锂原子和氢气的光化学反应速率,以及氩气对激发态锂原子的碰撞猝灭常数进行研究。研究结果表明:光谱测量方法不仅可以对同位素分离过程中同位素比率相对变化进行测量,而且也可以获取同位素分离过程的重要物理参数,是光化学同位素分离研究的重要测量手段。
The laser spectroscopy was playing an important role in the photochemical isotope separation.In this paper,a tunable external cavity diode laser was used as an optical source,which operates at a fixed center wavelength.In the weak laser irradiation,the laser absorption spectroscopy and the fluorescence emission spectroscopy were used for the studies of lithium isotope ratio measurement,photochemical rate for Li and H_2 and collisional quenching rate for Li(2P) and Ar.The experimental results show that the spectral measurement was an important tool in the photochemical isotope separation.It can not only measure the relative isotope ratios,but also can obtain the key physical parameters of the isotope separation process.
The laser spectroscopy was playing an important role in the photochemical isotope separation.In this paper,a tunable external cavity diode laser was used as an optical source,which operates at a fixed center wavelength.In the weak laser irradiation,the laser absorption spectroscopy and the fluorescence emission spectroscopy were used for the studies of lithium isotope ratio measurement,photochemical rate for Li and H_2 and collisional quenching rate for Li(2P) and Ar.The experimental results show that the spectral measurement was an important tool in the photochemical isotope separation.It can not only measure the relative isotope ratios,but also can obtain the key physical parameters of the isotope separation process.
引文
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[2]M.Yamashita,et al.Method for separation and enrichment of lithium isotopes by laser:U.S.Patent,4149077.1979,April 10.
[3]Chaltikyan V,et al.Perspectives of laser-chemical isotope separation of a long-lived fission product:cesium-1 35[J].Journal of Radioanalytical and Nuclear Chemistry,2009,280(2):343-352.
[4]王德武.激光分离同位素理论及应用[M].北京:原子能出版社,1999:456-468.
[5]Bokhan P A,et al.Laser Isotope Separation in Atomic Vapor[M].Germany:Wiley-VCH,2006:39-59.
[6]Myers E G,et al.Isotope selective laser enhancement of the Li+H_2 reaction[J].Appl Phys B,1987,43:247-251.
[7]Bokhan P A,et al,Quantum yield measurement in the chemical reactions of laser-excited[J].Chemical Physics,2010,372:6-1.
[8]唐柯鸿.激光光化学法同位素分离理论研究[D].北京:清华大学,2010.
[9]唐柯鸿,等.谱线非均匀展宽条件下原子激发的计算方法[J].原子与分子物理学报,2011,28(2):292-296.
[10]卢亚雄.激光物理[M].北京:北京邮电大学出版社,2005:52-56.