title: Cold collision frequency shifts in a 87Rb atomic fountain.
abstract: We present measurements of cavity frequency pulling and collisional frequency shifts in a 87Rb fountain with a frequency resolution of 3x10(-16). Agreement with theory is found for the cavity pulling and the measured collisional shifts. The clock shift is found at least 50 times smaller than in 133Cs.
authors.affiliation: BNM-LPTF, Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Sortais
authors.forename: S
authors.initials: S
authors.lastname: Bize
authors.forename: C
authors.initials: C
authors.lastname: Nicolas
authors.forename: A
authors.initials: A
authors.lastname: Clairon
authors.forename: C
authors.initials: C
authors.lastname: Salomon
authors.forename: C
authors.initials: C
authors.lastname: Williams