Laser-induced fluorescence spectra of Ba +* -He exciplexes produced in cold He gas
Laser-induced fluorescence spectra of Ba +* -He exciplexes produced in cold He gas
复制标题
冷氦气中产生的 Ba * -He 激基复合物的激光诱导荧光光谱
DOI：
10.1103/physreva.69.042505
复制
发表时间：
2004
影响因子：
2.9
通讯作者：
Y. Matsuo
中科院分区：
文献类型：
--
作者：
Y. Fukuyama;Y. Moriwaki;Y. Matsuo
报道了BaSp+-He激基缔合物的激光诱导荧光光谱观测结果。实验在3-30K温度范围内的冷气氦环境中进行，通过激发6p{sup 2}P{sub32}<；-6s{sup 2}S{sub12}跃迁，观察到了激基络合物的发射光谱。研究发现，这些光谱从自由空间的D2发射线红移，并由多个峰组成。通过对BaSp+*-He振动能级发射光谱的理论计算，很好地再现了实验结果。我们还研究了Ba{sup+*-He的6p{sup2}{pi}{sub32}态的振动动力学，并确定了在15K下6p{sup2}{pi}{sub32}态的碰撞振动弛豫截面为9.7+-1.1A{sup2}。
We report the observation of laser-induced fluorescence spectra of Ba{sup +*}-He exciplexes. The experiment is carried out in an environment of cold gaseous helium at a temperature range of 3-30 K. We have observed the emission spectra of exciplexes by means of excitation of the 6p {sup 2}P{sub 32}<-6s {sup 2}S{sub 12} transition of Ba{sup +} ions. It is found that these spectra are redshifted from the D2 emission line in the free space and are composed of several peaks. The experimental results are reproduced well by theoretical calculation of the emission spectra for vibrational levels of Ba{sup +*}-He. We also investigate the vibrational dynamics of the 6p {sup 2}{pi}{sub 32} state of Ba{sup +}*-He, and we have determined the collision-induced vibrational relaxation cross sections of the 6p {sup 2}{pi}{sub 32} state to be 9.7{+-}1.1 A{sup 2} at 15 K.