Measurement of atomic spectra and level lifetimes in multiply charged ions of astrophysical interest

天体物理学感兴趣的多电荷离子的原子光谱和能级寿命的测量

• 批准号: 82941075
• 负责人: Professor Dr. Elmar Träbert
• 金额: --
• 依托单位: Lehrstuhl für Astronomie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/82941075?language=en
• 关键词: Measurement; atomic; spectra; level; lifetimes

A principal goal of the project is the quality assurance of precise level lifetime measurements of low-lying levels in ions of astrophysical interest. To this end, systematic measurements have been undertaken at a heavy-ion storage ring, and large scale calculations of proven accuracy have been instigated for ions of several isoelectronic sequences. The measurements on one hand demonstrate the reliability (much better than 1% accuracy) of the storage ring technique for ions with an n=2 valence shell, but they also reveal the presence systematic error sources that can hamper the determination of lifetimes of n=3 valence shell ions by the population of specific long-lived 3d levels in the injector accelerator foil stripper. This particular systematic error must be different in other ion sources, and research is under way at the Livermore EBIT as well as at the Heidelberg heavy-ion storage ring TSR to clarify this point.

该项目的主要目标是对天体物理兴趣离子中低洼水平的精确水平寿命测量的质量保证。为此，已经在重离子存储环上进行了系统的测量，并为几个等电源序列的离子进行了大规模的经过验证精度计算。一方面的测量证明了具有n = 2价壳的离子的存储环技术的可靠性（比1％的精度要好得多），但它们还揭示了存在系统的误差源，这些误差源可以阻碍n = 3价壳离子离子的确定，而n = 3价壳离子的寿命是由注射器加速器中的特定长期3D水平的种群缩减了n = 3的误差源。在其他离子源中，这种特殊的系统误差必须有所不同，并且在Livermore EBIT以及Heidelberg重型离子存储环TSR中正在进行研究以澄清这一点。

项目成果

Heavy-ion storage-ring-lifetime measurement of metastable levels in the C-, N-, and O-like ions of Si, P, and S

Si、P 和 S 的 C、N 和 O 类离子的亚稳态水平的重离子存储环寿命测量

• DOI: 10.1103/physreva.85.042508
• 发表时间: 2012
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: E. Träbert;M. Grieser;J. Hoffmann;C. Krantz;R. Repnow;A. Wolf
• 通讯作者: A. Wolf

M1 and E2 decay-dependent lifetime of the lowest 1S0 level in C-like ions up to Ne4+ measured at a heavy-ion storage ring

• DOI: 10.1088/1367-2630/14/2/023061
• 发表时间: 2012-02
• 期刊: New Journal of Physics
• 影响因子: 3.3
• 作者: E. Träbert;M. Grieser;R. von Hahn;C. Krantz;R. Repnow;A. Wolf

Isoelectronic trends of the E1-forbidden decay rates of Al-, Si-, P-, and S-like ions of Cl, Ti, Mn, Cu, and Ge

• DOI: 10.1088/0953-4075/45/21/215003
• 发表时间: 2012-10
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: E. Träbert;M. Grieser;C. Krantz;R. Repnow;A. Wolf;F. Díaz;Y. Ishikawa;J. A. Santana