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28 March 2024
 
  » pubmed » pmid11329313

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Collisional frequency shifts in 133Cs fountain clocks
P J Leo ; P S Julienne ; F H Mies ; C J Williams ;
Date 23 Apr 2001
Journal Phys Rev Lett, 86 (17), 3743-6
AbstractWe present a theoretical analysis of the density dependent frequency shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys. Rev. Lett. 85, 2721 (2000)]. We predict a reversal in the clock shift at temperatures near 0.08 microK. Our results show that s waves dominate the collision process. However, as a consequence of the large scattering lengths in Cs the clock shift is strongly temperature dependent and does not reach a constant Wigner-law value until temperatures are less than 0.1 nK.
Source PubMed, pmid11329313
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