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Title: Optical frequency measurements of 6s {sup 2}S{sub 1/2}-6p {sup 2}P{sub 1/2} (D{sub 1}) transitions in {sup 133}Cs and their impact on the fine-structure constant

Abstract

High resolution laser spectroscopy of the 6s {sup 2}S{sub 1/2}{yields}6p {sup 2}P{sub 1/2} transition (D{sub 1} line) in neutral {sup 133}Cs is performed in a highly collimated thermal atomic beam by use of a femtosecond laser frequency comb and narrow-linewidth diode laser. The diode laser is offset locked to a single frequency component of the femtosecond laser frequency comb and probes the optical transitions between selected pairs of ground-state and excited-state hyperfine components. A photodiode detects the excited-state decay fluorescence, and a computerized data acquisition system records the signal. The Doppler shift is eliminated by orienting the laser beam in a direction perpendicular to the atomic beam to within a precision of 5x10{sup -6} rad. Optical frequencies for all four pairs of hyperfine components are measured independently, from which the D{sub 1} line centroid and excited-state hyperfine splitting are obtained by least-squares minimization with the ground-state splitting as a fixed constraint. We find the D{sub 1} line centroid to be f{sub D{sub 1}}=335 116 048 748.1(2.4) kHz, and the 6p {sup 2}P{sub 1/2} state hyperfine splitting to be 1 167 723.6(4.8) kHz. These results, in combination with the results of an atom interferometry experiment by Wicht et al. [Phys. Scriptamore » T 102, 82 (2002)], are used to calculate a new value for the fine-structure constant.« less

Authors:
; ; ; ; ; ;  [1]
  1. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556-5670 (United States)
Publication Date:
OSTI Identifier:
20786899
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.73.032504; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ACCURACY; ATOMIC BEAMS; ATOMS; CESIUM; CESIUM 133; DATA ACQUISITION SYSTEMS; DECAY; DOPPLER EFFECT; EXCITED STATES; FINE STRUCTURE; FLUORESCENCE; FREQUENCY MEASUREMENT; GROUND STATES; INTERFEROMETRY; KHZ RANGE; LASER RADIATION; LASER SPECTROSCOPY; LEAST SQUARE FIT; MINIMIZATION

Citation Formats

Gerginov, V, Calkins, K, Tanner, C E, McFerran, J J, Diddams, S, Bartels, A, Hollberg, L, School of Physics, University of Western Australia, 35 Stirling Highway, Nedlands, 6009, and Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway M.C. 847, Boulder Colorado 80305. Optical frequency measurements of 6s {sup 2}S{sub 1/2}-6p {sup 2}P{sub 1/2} (D{sub 1}) transitions in {sup 133}Cs and their impact on the fine-structure constant. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Gerginov, V, Calkins, K, Tanner, C E, McFerran, J J, Diddams, S, Bartels, A, Hollberg, L, School of Physics, University of Western Australia, 35 Stirling Highway, Nedlands, 6009, & Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway M.C. 847, Boulder Colorado 80305. Optical frequency measurements of 6s {sup 2}S{sub 1/2}-6p {sup 2}P{sub 1/2} (D{sub 1}) transitions in {sup 133}Cs and their impact on the fine-structure constant. United States. https://doi.org/10.1103/PHYSREVA.73.0
Gerginov, V, Calkins, K, Tanner, C E, McFerran, J J, Diddams, S, Bartels, A, Hollberg, L, School of Physics, University of Western Australia, 35 Stirling Highway, Nedlands, 6009, and Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway M.C. 847, Boulder Colorado 80305. 2006. "Optical frequency measurements of 6s {sup 2}S{sub 1/2}-6p {sup 2}P{sub 1/2} (D{sub 1}) transitions in {sup 133}Cs and their impact on the fine-structure constant". United States. https://doi.org/10.1103/PHYSREVA.73.0.
@article{osti_20786899,
title = {Optical frequency measurements of 6s {sup 2}S{sub 1/2}-6p {sup 2}P{sub 1/2} (D{sub 1}) transitions in {sup 133}Cs and their impact on the fine-structure constant},
author = {Gerginov, V and Calkins, K and Tanner, C E and McFerran, J J and Diddams, S and Bartels, A and Hollberg, L and School of Physics, University of Western Australia, 35 Stirling Highway, Nedlands, 6009 and Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway M.C. 847, Boulder Colorado 80305},
abstractNote = {High resolution laser spectroscopy of the 6s {sup 2}S{sub 1/2}{yields}6p {sup 2}P{sub 1/2} transition (D{sub 1} line) in neutral {sup 133}Cs is performed in a highly collimated thermal atomic beam by use of a femtosecond laser frequency comb and narrow-linewidth diode laser. The diode laser is offset locked to a single frequency component of the femtosecond laser frequency comb and probes the optical transitions between selected pairs of ground-state and excited-state hyperfine components. A photodiode detects the excited-state decay fluorescence, and a computerized data acquisition system records the signal. The Doppler shift is eliminated by orienting the laser beam in a direction perpendicular to the atomic beam to within a precision of 5x10{sup -6} rad. Optical frequencies for all four pairs of hyperfine components are measured independently, from which the D{sub 1} line centroid and excited-state hyperfine splitting are obtained by least-squares minimization with the ground-state splitting as a fixed constraint. We find the D{sub 1} line centroid to be f{sub D{sub 1}}=335 116 048 748.1(2.4) kHz, and the 6p {sup 2}P{sub 1/2} state hyperfine splitting to be 1 167 723.6(4.8) kHz. These results, in combination with the results of an atom interferometry experiment by Wicht et al. [Phys. Scripta T 102, 82 (2002)], are used to calculate a new value for the fine-structure constant.},
doi = {10.1103/PHYSREVA.73.0},
url = {https://www.osti.gov/biblio/20786899}, journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}