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PUBLICATIONS

Collisional Frequency Shifts in 133Cs Fountain Clocks

Published

Author(s)

P J. Leo, Paul S. Julienne, F H. Mies, Carl J. Williams

Abstract

We present a theoretical analysis of the pressure shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys. Rev. Lett. xx, xx (2000)]. We predict a reversal in the pressure shift at temperatures near 0.08 K which could allow elimination of a large source of uncertainty in the Cs fountain clock. Our results show that s-waves dominate the collision process however as a consequence of the large scattering lengths in Cs the pressure shift is strongly temperature dependent and does not reach a constant Wigner-law value until temperatures are less than 0.1 nK.
Citation
Physical Review Letters
Volume
86
Issue
No. 17
Pub Type
Journals

Keywords

cesium, clock shift, fountain clock, ultracold scattering

Citation

Leo, P. , Julienne, P. , Mies, F. and Williams, C. (2001), Collisional Frequency Shifts in <sup>133</sup>Cs Fountain Clocks, Physical Review Letters (Accessed October 13, 2025)

Issues

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Created April 1, 2001, Updated February 17, 2017
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