Total collisional depopulation rates for He(n1S0) (3 ≦ n ≦ 6), He(31P1) in thermal collisions with Rb have been measured using the transient-decay method. The measured quenching cross-sections increase from 4.3 · 10−10 cm2 to 24 · 10−14 cm2 with increasing n from 3 to 6.

Comparison of experimental results with theoretical estimations shows that the main processes of quenching depend on n. He-atoms in the n = 3, 4 states are mainly quenched by Penning ionisation and higher excited states by collisional l-mixing.

Desaktivierung angeregter He‐Atome (31P1, 31S0, 41S0, 51S0, 61S0) durch Rb‐Atome

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Desaktivierung angeregter He‐Atome (31P1, 31S0, 41S0, 51S0, 61S0) durch Rb‐Atome