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Energy-Transfer Kinetics for Xe (6p[1/2]0) Atoms in Kr, Ar, Ne, and He
The Journal of Physical Chemistry A ( IF 2.9 ) Pub Date : 2018-05-29 00:00:00 , DOI: 10.1021/acs.jpca.8b03238
Shan He 1, 2 , Dong Liu 1 , Xueyang Li 1, 2 , Junzhi Chu 1, 2 , Jingwei Guo 1 , Jinbo Liu 1 , Shu Hu 1 , Fengting Sang 1 , Yuqi Jin 1
Affiliation  

The kinetic processes for the Xe (6p[1/2]0) atoms in Kr, Ar, Ne, and He buffer gases were studied. We found that Kr, Ar, and Ne atoms can be used to switch the amplified spontaneous emission (ASE) channel from 3408 nm (6p[1/2]0–6s′[1/2]1) to 3680 nm (5d[1/2]1–6p[1/2]1), while Xe and He atoms do not show such a phenomenon. This ASE channel switch is mainly ascribed to the fast transfer of 6p[1/2]0 → 5d[1/2]1. On the basis of the rate equations for two-state coupling (energy-transfer processes between the two states are very rapid), the reason why the ASE channel switch effect normally coincides with a double exponential decay of the spontaneous emission at 828 nm (6p[1/2]0–6s[3/2]1) is explained. The actual situations in Xe, Ar, Ne, and He follow this rule. However, the strictly single exponential decay of the spontaneous emission at 828 nm and strong ASE channel switch effect simultaneously emerge in Kr. This indicates that the transfer of 6p[1/2]0 → 5d[1/2]1 in Kr does not occur via two-state coupling, but via two steps of near-resonance collision through the 5s[3/2]2 (Kr) state as the intermediate state (6p[1/2]0 → 5s[3/2]2 (Kr) → 5d[1/2]1). In addition, we found Xe (6p[1/2]0) atoms strongly tend to reach the 6p[3/2]2, 6p[3/2]1, and 6p[5/2]2 states through the 5s[3/2]2 (Kr) state as the intermediate state in Kr. The 5s[3/2]2 (Kr) state plays a very important role in the energy-transfer kinetics for the Xe (6p[1/2]0) atoms. Kr is probably an excellent buffer gas for laser systems based on Xe.

中文翻译:

Kr,Ar,Ne和He中Xe(6p [1/2] 0)原子的能量转移动力学

研究了Kr,Ar,Ne和He缓冲气体中Xe(6p1 / 2 0)原子的动力学过程。我们发现,氪,氩气,和Ne原子可以被用于切换放大的自发发射(ASE)信道从3408纳米(6P 1/2 0 -6S'[1/2] 1)至3680纳米(图5d [ 1/2] 1 –6p [1/2] 1),而Xe和He原子没有显示这种现象。此ASE通道切换主要归因于6p [1/2] 0 →5d1 / 2(1)的快速传输。根据两种状态耦合的速率方程式(两种状态之间的能量转移过程非常快),ASE通道切换效应通常与自发发射在828 nm处的双指数衰减一致的原因(6p说明[1/2] 0 –6s [3/2] 1。Xe,Ar,Ne和He中的实际情况遵循此规则。但是,在Kr中会同时出现828 nm处自发发射的严格单指数衰减和强ASE通道切换效应。这表明,6P的转移[1/2] 0 →5D [1/2] 1与氪通过两状态耦合不会发生,而是通过两个步骤近共振碰撞通过5S [3/2] 2(KR)状态作为中间状态(6P 1/2 0 →5秒[3/2] 2(KR)→5D 1/2 1)。此外,我们发现氙(6P 1/2 0)原子强烈趋于到达6P [3/2] 2,6P [3/2] 1,和6P [5/2] 2点通过5秒的状态[ 3/2] 2(Kr)状态作为Kr中的中间状态。5s [3/2] 2(Kr)态在Xe(6p1 / 2)0原子的能量转移动力学中起着非常重要的作用。对于基于Xe的激光系统,Kr可能是一种出色的缓冲气体。
更新日期:2018-05-29
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