铝同位素离子26A1+中的31S0-33P0跃迁：一种潜在的卓越被动激光频率标准和光谱分析仪。

The 31S0-33P0 transition in the aluminum isotope ion 26A1+: a potentially superior passive laser frequency standard and spectrum analyzer.

作者信息

Yu N, Dehmelt H, Nagourney W

机构信息

Department of Physics, University of Washington, Seattle, WA 98195, USA.

出版信息

Proc Natl Acad Sci U S A. 1992 Aug 15;89(16):7289. doi: 10.1073/pnas.89.16.7289.

DOI:10.1073/pnas.89.16.7289

PMID:11607314

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC49694/

Abstract

The aluminum 26 isotope ion is proposed here as a possible candidate for a superior atomic clock. For this even isotope, the extraordinarily long lifetime of the 33P0 state offers a potential clock transition (31S0-33P0) linewidth of 300 microHz. The mF = 0 --> 0 transition has only a quadratic Zeeman shift approximately 4 x 10(-18) at 0.1 Gauss magnetic field, compared to approximately 10(-8) for the hydrogen maser. Electronic quadrupole moments vanish for both J and J' states and with them shifts due to electric field gradients. All shifts have been estimated and are orders of magnitude less than for Hg+ and Ba+, which are being studied as atomic clock elements.

摘要

本文提出铝26同位素离子可能是一种更优原子钟的候选者。对于这种偶数同位素，33P0态超长的寿命使得潜在的时钟跃迁（31S0 - 33P0）线宽可达300微赫兹。在0.1高斯磁场下，mF = 0→0跃迁的二次塞曼频移仅约为4×10⁻¹⁸，而氢脉泽的该频移约为10⁻⁸。J和J'态的电子四极矩均为零，因此不存在因电场梯度导致的频移。所有频移均已估算，其数量级远小于正在作为原子钟元件进行研究的Hg⁺和Ba⁺。