Precision measurement of parity nonconservation in cesium
Precision measurement of parity nonconservation in cesium
复制标题
铯宇称不守恒的精确测量
DOI：
10.1139/p99-002
复制
发表时间：
1999
影响因子：
1.2
通讯作者：
C. Wieman
中科院分区：
文献类型：
--
作者：
C. S. Wood;S. C. Bennett;J. L. Roberts;D. Cho;C. Wieman
详细讨论了铯原子宇称不守恒（PNC）的测量。利用自旋极化原子束，该实验在测量铯的6S和7S态之间的跃迁的PNC振幅时实现了0.35%的分数不确定度，这是迄今为止原子PNC的最低不确定度。通过比较两个超精细跃迁的PNC振幅，我们首次测量了核自旋相关的贡献，所产生的核的再极点时刻。本文的主要部分描述了系统误差的表征和消除。PACS编号：32.80.Ys，11.30.Er，12.15.Ji，32.10.Dk
The measurement of parity nonconservation (PNC) in atomic cesium is discussed in detail. With a spin-polarized atomic beam, this experiment achieves a fractional uncertainty of 0.35% in the measurement of the PNC amplitude for the transition between the 6S and 7S states of cesium, the lowest uncertainty of atomic PNC to date. By comparing the PNC amplitude on two hyperfine transitions, we measure for the first time the nuclear-spin-dependent contribution that arises from the nuclear anapole moment. A major portion of this paper describes the characterization and elimination of systematic errors.PACS Nos.: 32.80.Ys, 11.30.Er, 12.15.Ji, 32.10.Dk