The results of an experimental study of population dynamics following excitation of 62D5/2, 3/2 and 82S1/2 states of rubidium are reported. Excitation transfer and quenching cross-sections in collisions with ground state rubidium atoms, and natural lifetimes have been measured. The experiment was performed in a vapour cell, using pulsed two-photon excitation and photon counting detection. The analysis of time dependent signals was based on a rate equation model in which transitions induced by thermal radiation have been accounted for. The measurements yielded following results: (1) 62D state J-mixing cross-section: σRb-Rb 6D5/2→6D3/2 = 9.2(2.1) × 10-14 cm2; (2) cross-sections for 82S → 62D excitation transfer process: σRb-Rb 8S→6D = 3.4(1.2) × 10-14 cm2; (3) quenching cross-sections: σRb-Rb q, 8S = 12.8(3.4) × 10-14 cm2, σRb-Rb q, 6D3/2 = 22.8(2.9) × 10-14 cm2, σRb-Rb q, 6D5/2 = 14.1(5.7) × 10-14 cm2; (4) radiative lifetimes: τ8S = 161(3) ns, τ6D3/2 = 256(4) ns, τ6D5/2 = 249(5) ns.
|Original language||English (US)|
|Number of pages||10|
|Journal||European Physical Journal D|
|State||Published - Jan 2000|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics