Radiative lifetimes of the NaRb C(3)1Σ+ state: experiment and theory

被引：0
作者：
I. Klincare
M. Tamanis
R. Ferber
A. Zaitsevskii
E. A. Pazyuk
A. V. Stolyarov
机构：
[1] Department of Physics and Institute of Atomic Physics and Spectroscopy,Department of Chemistry
[2] University of Latvia,undefined
[3] Moscow State University,undefined
来源：
The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics | 2006年 / 39卷
关键词：
33.70.Ca Oscillator and band strengths, lifetimes, transition moments, and Franck-Condon factors; 33.50.Hv Radiationless transitions, quenching;
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摘要：
Radiative lifetimes for 2≤v′≤44 rovibronic C1Σ+ state levels of NaRb and quenching collision cross-sections with Rb atoms have been directly measured in a thermal cell by detecting time resolved laser induced fluorescence after pulsed excitation. Many body multipartitioning theory was applied to calculate C1Σ+-X1Σ+ and C1Σ+-A1Σ+ transition dipole moments. The relevant ab initio matrix elements were converted to the C1Σ+ state radiative lifetimes. The strong spin-orbit A1Σ+∼ b3Π coupling effect on the total C → A transition probabilities and lifetimes of the C1Σ+ state is discussed. The measured radiative lifetimes show a decrease from 61 to 34 ns as the v′ values increase, the results being in good agreement with calculations. The averaged collisional quenching cross-section value σ=(3±1)×10-14 cm2 was determined for NaRb (C1Σ+) + Rb collisions from the Stern-Volmer plots.
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页码：373 / 378
页数：5
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