Influence of Kr Atoms on the Fundamental and Overtone Vibrational Frequency for HF（X¹∑⁺）

The collision reaction that \operatornameKr\left( ^1 \mathrm~S_\mathrmg\right)+\mathrmHF\left(\mathrmX^1 \Sigma^+ ; v=1,2,3 ; J=4\right) \rightarrow \operatornameKr\left( ^1 \mathrm~S_\mathrmg\right)+\mathrmHF\left(\mathrmX^1 \Sigma^+\right.; \left.\nu^\prime, J^\prime\right) has been studied using Monte-Carlo trajectory method,and it has been found that Kr atoms have influence on the fundamental and overtone vibrational frequency for \mathrmHF\left(\mathrmX^1 \Sigma^+\right). The studying results show that, when the initial relative translational energy E_t \leqslant 251.0 \mathrm~kJ / \mathrmmol, Kr atoms can reduce the particle number reversion of the fundamental vibrational frequency, and increase it of the overtone vibrational frequency, particularly in the energy level v^\prime=2, and Kr atoms are more strong on relaxing the higher rotational states \left(J^\prime \geqslant 4\right). Thus, for hydrogen fluoride (HF) overtone frequency laser Kr atoms can obviously increase the strength of light and improve the transmission property in the air.