RbCs 的 500nm 体系：分配和强度异常。

500 nm system of RbCs: assignments and intensity anomalies.

机构信息

Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea.

出版信息

J Phys Chem A. 2009 Nov 5;113(44):12187-92. doi: 10.1021/jp904927u.

PMID:19863134

Abstract

We have investigated the RbCs 500 nm system by mass-resolved resonance enhanced two-photon ionization in a cold molecular beam. The 4 3Pi0 v' = 10-39, 4 3Pi1 v' = 14-28, and 6 1Sigma+ v' = 12-28 <-- X 1Sigma+ v'' = 0 transitions have been observed and assigned for the first time. The 4 3Pi0 v' <-- X 1Sigma+ v'' = 0 transitions abnormally show double maxima of the vibronic-band intensity distribution around v' = 22 and 38. The intensities of the transitions to the lower vibrational levels (4 3Pi0 v' = 10-32) are explained well by the direct transitions from the X 1Sigma+ v'' = 0 level following the Franck-Condon principle. The transitions to the higher vibrational levels (4 3Pi0 v' > or = 33) borrow intensities through the interaction with nearby 6 1Sigma+ perturber levels.

摘要

我们通过在冷分子束中进行质量分辨共振增强双光子电离研究了 RbCs 500nm 系统。首次观察并分配了 4 3Pi0 v' = 10-39、4 3Pi1 v' = 14-28 和 6 1Sigma+ v' = 12-28 <-- X 1Sigma+ v'' = 0 跃迁。4 3Pi0 v' <-- X 1Sigma+ v'' = 0 跃迁异常显示出围绕 v' = 22 和 38 的振子带强度分布的双峰。通过 Franck-Condon 原理，从 X 1Sigma+ v'' = 0 能级直接跃迁，很好地解释了较低振动能级（4 3Pi0 v' = 10-32）跃迁的强度。对于较高振动能级（4 3Pi0 v' >= 33）的跃迁，通过与附近的 6 1Sigma+扰动能级的相互作用借用强度。