Properties of rubidium-argon Van der Waals molecules from the relaxation of polarized Rb atoms
Résumé
Relaxation rate measurements have been performed between 0.1 and 10 G on optically polarized Rb atoms in Argon at pressures ranging from 0.1 to 5 torrs. The relaxation is mainly induced by spin-rotation coupling in RbA Van der Waals molecules. Interpretation of the data gives molecular parameters such as the average spin-rotation constant (γ/h = 0.105 MHz), the molecular lifetime (τ = 4.85 x 10 -8 s at 1 torr) and the constant of mass action for the chemical equilibrium Rb + A ⇌ RbA (κ = 94 Å3/molecule at 300 K).
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