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.

具有非常小的电磁过渡速率的亚稳态激发态中的原子和离子是能够储存的有前途的系统，用于实现超注射原子钟，用于天体物理媒体的诊断，涉及辐射性和非辐射过程的竞争，用于实现新型的冷原子气体的类型，用于探测基本的corlelations corlelation corlelation corment corment cornect of-eyt corment corment corment corment corment eyt corment cornect of the Elctron效果。尤其是，非常长的原子状态，例如铍样离子中最低的激发态，即无法通过单光子过渡衰减的1S2 2S 2P 3P0状态对原子壳内的相关性高度敏感，甚至对原子核结构。如果核具有非零磁矩，则可以通过与其相邻的3P1状态混合通过高精灵混合来淬灭3P0状态。最新的理论计算在迄今为止唯一的实验结果中明显不同意，这些计算涉及多个带电的铍中的这种效果。拟议的工作将为超精细诱导的铍状霓虹灯，硅和硫离子的过渡速率提供准确的实验值，以显着扩大实验数据的主体。测量将使用配备高分辨率电子目标的重离子存储环进行。

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

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

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