Radiative lifetimes, collisional mixing, and quenching of the cesium 5DJ levels

Sasso, Antonio; Demtröder, Wolfgang; Colbert, Thomas M; Wang, C.; Ehrlacher, E.; Huennekens, J.

doi:10.1103/physreva.45.1670

Cited by 23 publications

(48 citation statements)

References 43 publications

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“…In the above system of equations the quadrupole radiative rates A 30 and A 40 are not included since they are negligible in comparison with the total depopulation rates for the 5D J states. According to results reported by Sasso et al (1992), the cross sections for the quenching of the 5D J sublevels are close in value (see the introduction). Therefore, we can assume that Q 3 ≈ Q 4 ≡ Q D .…”

Section: Rate Equations and Methodssupporting

confidence: 73%

“…In our recent paper (Movre et al 1999) we have mentioned the preliminary cross section values (σ 5/2→3/2 = (45 ± 15) × 10 −16 cm 2 , σ D = (30 ± 10) × 10 −16 cm 2 ) for the processes considered here. These values, based on the scant set of measured data, showed fair agreement with the results of Sasso et al (1992). Here, we present the method and the results of the completed extensive measurements of the processes at hand.…”

Section: Introductionsupporting

confidence: 72%

“…Sasso et al (1992) considered how the 5D level (atomic) quenching can come about. They concluded that it must occur through a highly repulsive potential curve of the 6S + 6P manifold, and that the most likely candidate is the 2 3 + u state.…”

Section: Theorymentioning

confidence: 99%

“…To improve the accuracy of the values obtained, the datum obtained in the previous experiment (Wu and Huennekens 1984) at much higher vapour density (N Cs ≈ 10 17 cm −3 ) was expressed in terms of the intensity ratio measured by Sasso et al (1992) and added to the data field to be fitted. This combined set of data yielded the cross section values σ 5/2→3/2 = (33 ± 9) × 10 −16 cm 2 and σ 3/2 = (26 ± 12) × 10 −16 cm 2 .…”

Section: Introductionmentioning

confidence: 99%

“…The atomic nature of the 5D level quenching was confirmed by pulsed measurements too. Taking into account the results of both cw and pulsed experiments, Sasso et al (1992) reported the best cross section values to be σ 5/2→3/2 = (36 ± 8) × 10 −16 cm 2 and σ D = (30 ± 3) × 10 −16 cm 2 . The above history of the investigations of the mixing and quenching processes of Cs 5D J states shows that in spite of being studied many times, none of the results was completely confirmed by later re-measurement.…”

Section: Introductionmentioning

confidence: 99%

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Mixing and quenching of the Cs 5D_Jstates induced by collisions with caesium ground-state atoms

Movre¹,

Vadla²,

Horvatić³

2000

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. Applying the cw laser absorption and fluorescence method the cross sections for the fine-structure mixing and quenching of the caesium 5D J states have been measured in pure caesium vapour. Caesium atoms were optically excited to the 5D 5/2 state via the quadrupole-allowed 6S 1/2 → 5D 5/2 transition. The ground-state caesium density N 0 , obtained from the absorption at the pumped quadrupole transition, and the fluorescence intensity I 689 of the sensitized 5D 3/2 → 6S 1/2 emission were measured simultaneously in the range 3 × 10 14 cm −3 N 0 1 × 10 16 cm −3 at constant temperature T = 585 K. It was found that the quantity N 2 0 /I 689 exhibited a parabolic dependence on N 0 , confirming that the quenching of the Cs 5D J states is due to collisions with Cs ground-state atoms, not molecules. The coefficients of the second-order polynomial fitted through the measured data yielded the cross sections σ 5/2→3/2 = (57 ± 19) × 10 −16 cm 2 and σ D = (35 ± 10) × 10 −16 cm 2 for the Cs 5D J fine-structure mixing and quenching, respectively, due to collisions with caesium ground-state atoms. Using recently calculated Cs * + Cs potentials we performed an analysis which shows good agreement between the measured values and the theoretical predictions.

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Section: Rate Equations and Methodssupporting

confidence: 73%

Section: Introductionsupporting

confidence: 72%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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