Resonant two-photon spectroscopy of the 2s3d 1D2 level of neutral 9Be

被引：6
|
作者：
Cook, E. C. [1 ]
Vira, A. D. [1 ,2 ]
Williams, W. D. [1 ]
机构：
[1] Smith Coll, Phys Dept, Northampton, MA 01063 USA
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW A | 2020年 / 101卷 / 04期
基金：
美国国家科学基金会;
关键词：
FREQUENCY STABILIZATION; SPECTRUM; STATES;
D O I：
10.1103/PhysRevA.101.042503
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report an absolute frequency measurement of the 2s3d(1)D(2) state in neutral Be-9 using two-photon spectroscopy with a resonant intermediate state. The absolute center-of-gravity energy is determined to be 64 428.40 321(55) cm(-1), a factor of 180 more precise than the previous experimental measurement. We also confirm our previous result for the energy of the intermediate 2s2p(1)P(1) level. Precision is limited by unresolved hyperfine structure and the complications of performing resonant two-photon spectroscopy on an atomic beam. A three-level rate-equation analysis is presented to explore, and minimize, systematic uncertainties arising from small deviations of the angle between the atomic and optical beams off-perpendicular.
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页数：8
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