Ds. Weiss et al., PRECISION-MEASUREMENT OF THE PHOTON RECOIL OF AN ATOM USING ATOMIC INTERFEROMETRY, Physical review letters, 70(18), 1993, pp. 2706-2709
The atomic recoil from the absorption of up to 60 photons is measured
using an atom interferometer. We determine HBAR/m(Cs) with a precision
of 10(-7) in 2 h of integration time.