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Physical Review A

Pressure broadening and line shifting of atomic strontium 5s^2 ^1S~0¿5s5p ^3P~1 and 5s5p ^3P~0~,~1~,~2¿5s6s ^3S~1 absorption transitions induced by noble-gas collisions (7 pages)

Jeremy C. Holtgrave

Published Jan 1, 2005• 0 citations
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Studies of the \textbf{\textit{5s21^{21}21S0_{0}0​-- 5s5p3^{3}3P1_{1}1​}} Transition in Atomic Strontium
In this paper we present a method of observing triplet state transitions of strontium. The intercombination transition is employed to pump the atom population from singlet-state (5s2)1S0 to triplet-state (5s5p)3P1 by a laser at 689 nm. Then 688 nm laser is also employed to divide atom population into the two other triplet-state states (5s5p)3P0 and (5s5p)3PP2. We can obtain the absorption signals of triplet-state transition (5s6s)3S1 → (5s5p)3P0 and (5s6p)3S1 → (5s5p)3P3P2. And these atomic absorption signals can be used for stabilizing the repumping light 679 nm and 707 nm directly to transition line of strontium. This method can be used in the Doppler cooling of strontium atoms.
Pressure broadening of the sodium 3s3s3s-3p3p3p resonance lines by helium atoms.
We report studies of collision-induced features of the 3S(1/2) yields 3P(1/2) yields 4D(3/2) two-photon absorption in atomic sodium vapor undergoing collisionss with several rare gas perturbers. The results yield the collisional redistribution function which describes the nonresonant excitation of the 3P(1/2) intermediate state. Good agreement with theory is obtained only if effects of 3P(1/2) in equilibrium with 3P(3/2) state-changing collisions are included in the calculations. Results are used to obtain a value for a pressure broadening coefficient in the Na-Kr system. (Author)