Stimulated Emission and Rb Spin-Exchange Cross Section

The role of the Pauli principle in spin exchange collisions

“…Spin exchange collisions also strongly affect the hydrogen maser operation, since they broaden and shift the hyperfine transition of the atoms [3,4]. This phenomenon also occurs with the rubidium maser [5,6]. Spin exchange processes affect the intensity of absorption or emission of the 21 cm (*) Laboratoire âssocié au Centre National de la Recherche Scientifique.…”

“…(el is bound in the Ri potential well, e2 in the R2 potential well, or the reverse). Actually (5a, b) are not strictly speaking stationary states, since the tunnel effect allows both electrons to transfer froni one potential well to the other (5).…”

Coherent population trapping for the realization of a small, stable, atomic clock

“…This field is amplified by the cavity and reacts back on the atom producing stimulated emission in the ensemble [23]. Microwave energy is coupled out of the cavity by the coupling loop and may be detected with an appropriate heterodyne receiver.…”