Depolarizing collision anisotropy and collision echo in ytterbium vapor
Н. Н. Рубцова, Гольдорт Вениамин Гершевич, Igor V. Yevseyev +3 more
A photon echo induced exclusively by collisions of ytterbium atoms with buffer gas atoms has been observed at a 0 ⟷ 1-type1 S 0(6s 2)-3 P 1(6s6p) 174Yb transition. The polarization properties of a collision echo and the buffer gas density dependence of its intensity agree with theoretical predictions of a model of depolarizing collisions that takes into account the dependence of a relaxation matrix on the velocity of active particles. Thus, direct experimental evidence of the relaxation anisotropy due to depolarizing collisions has been obtained.
Journal of Experimental and Theoretical Physics Letters•Mar 1, 2008•14 citations