Collisional perturbation of radio-frequency E1 transitions in an atomic beam of dysprosium -: art. no. 063409

被引：7

作者：

Cingöz, A

Nguyen, AT

Budker, D

Lamoreaux, SK

Lapierre, A

Torgerson, JR

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA

[3] Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW A | 2005年 / 72卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.72.063409

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have studied collisional perturbations of radio-frequency (rf) electric-dipole (E1) transitions between the nearly degenerate opposite-parity levels in atomic dysprosium (Dy) in the presence of 10 to 80 mu Torr of H-2, N-2, He, Ar, Ne, Kr, and Xe. Collisional broadening and shift of the resonance, as well as the attenuation of the signal amplitude are observed to be proportional to the foreign-gas density with the exception of H-2 and Ne, for which no shifts were observed. Corresponding rates and cross sections are presented. In addition, rates and cross sections for O-2 are extracted from measurements using air as foreign gas. The primary motivation for this study is the need for accurate determination of the shift rates, which are needed in a laboratory search for the temporal variation of the fine-structure constant [A. T. Nguyen, D. Budker, S. K. Lamoreaux, and J. R. Torgerson, Phys. Rev. A 69, 22105 (2004)].

引用

页数：11