Hyperfine induced transition rates in multiply charged beryllium like ions from storage ring experiments

存储环实验中多电荷铍离子的超精细诱导转变率

• 批准号: 192993699
• 负责人: Professor Dr. Stefan Schippers
• 金额: --
• 依托单位: Arbeitsgruppe Atom- und Molekülphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/192993699?language=en
• 关键词: Hyperfine; induced; transition; rates; multiply

Atoms and ions in metastable excited states with very small electromagnetic transition rates are promising systems for energy storage, for realizing ultraprecise atomic clocks, for the diagnostic of astrophysical media regarding the competition of radiative and non-radiative processes, for realizing novel types of cold atomic gases, and for probing fundamental correlation effects in the bound states of few-electron systems. In particular, extremely long lived atomic states such as the lowest excited state in beryllium-like ions, i.e, the 1s2 2s 2p 3P0 state which cannot decay via a one-photon transition, are highly sensitive to correlations within the atomic shell and even to the atoms nuclear structure. If the nucleus has nonzero magnetic moment it can quench the 3P0 state by hyperfine mixing with its neighboring 3P1 state. Recent theoretical calculations which address this effect in multiply charged beryllium like ions disagree significantly with the so far only experimental result. The proposed work will provide accurate experimental values for hyperfine induced transition rates of berylliumlike neon, silicon and sulfur ions in order to significantly enlarge the body of experimental data. The measurements will be carried out using a heavy-ion storage ring equipped with a high-resolution electron target.

处于亚稳态激发态的原子和离子具有非常小的电磁跃迁率，是有前途的能量存储系统，用于实现超精密原子钟，用于诊断辐射和非辐射过程竞争的天体物理介质，用于实现新型冷原子气体，以及用于探测少电子系统束缚态中的基本相关效应。特别是，极长寿命的原子态，如类铍离子中的最低激发态，即不能通过单光子跃迁衰变的1s2 2s 2p 3P0态，对原子壳层内的相关性甚至原子核结构都非常敏感。如果原子核具有非零磁矩，它可以通过与邻近的3P1态超精细混合来淬灭3P0态。最近的理论计算，解决了这种影响，在多电荷铍离子不同意迄今为止唯一的实验结果显着。该工作将为类铍氖、硅和硫离子的超精细诱导跃迁速率提供准确的实验值，以显着扩大实验数据的范围。测量将使用配备高分辨率电子靶的重离子储存环进行。

项目成果

Absolute rate coefficients for photorecombination of beryllium-like and boron-like silicon ions

• DOI: 10.1088/0953-4075/49/7/074004
• 发表时间: 2015-11
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: D. Bernhardt;A. Becker;C. Brandau;M. Grieser;M. Hahn;C. Krantz;M. Lestinsky;O. Novotn'y;R. Repnow;D. Savin;K. Spruck;A. Wolf;A. Muller;S. S. I. F. A. U. Molekulphysik-S.;Justus-Liebig-University Giessen;Leihgesterner Weg 217;35392 Giessen;Germany;M. F. Kernphysik;1. Saupfercheckweg;69117 Heidelberg;I. Institut;16 Heinrich-Buff-Ring;G. H. F. Schwerionenforschung;1. Planckstrasse;64291 Darmstadt;Columbia Astrophysics Laboratory;C. University;New York.;NY 10027;Usa

Spectroscopy of berylliumlike xenon ions using dielectronic recombination

• DOI: 10.1088/0953-4075/48/14/144008
• 发表时间: 2015-05
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: D. Bernhardt;C. Brandau;Z. Harman;C. Kozhuharov;S. Böhm;F. Bosch;S. Fritzsche;J. Jacobi;S. Kieslich;H. Knopp;F. Nolden;W. Shi;Z. Stachura;M. Steck;T. Stöhlker;S. Schippers;A. Müller

Storage-ring measurement of the hyperfine induced 2s2p 3P0 → 2s2 1S0 transition rate in berylliumlike sulfur

• DOI: 10.1103/physreva.85.012513
• 发表时间: 2011-11
• 期刊: Journal of Physics: Conference Series
• 作者: S. Schippers;D. Bernhardt;M. Grieser;M. Hahn;C. Krantz;M. Lestinsky;A. Müller;O. Novotný;R. Repnow;D. Savin;A. Wolf

Effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions

外部磁场对 Be 类离子 E1M1 双光子衰变率测定的影响

• DOI: 10.1103/physreva.88.022513
• 发表时间: 2013-07
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Grumer, Jon;Li Wenxian;Bernhardt Dietrich;Li Jiguang;Schippers Stefan;Brage Tomas;Jonsson Per;Hutton Roger;Zou Yaming
• 通讯作者: Zou Yaming

Storage-ring measurements of hyperfine induced transition rates in berylliumlike ions

类铍离子超精细诱导跃迁率的存储环测量

• DOI: 10.1063/1.4815836
• 发表时间: 2013
• 期刊: arXiv: Atomic Physics
• 作者: S. Schippers