| 存在缓冲气体的Cs蒸气中的三体碰撞 |
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| 引用本文： | 袁强华,张刚台,穆保霞,王淑英,崔秀花,戴康,沈异凡. 存在缓冲气体的Cs蒸气中的三体碰撞[J]. 量子电子学报, 2006, 23(5): 603-606 |
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| 作者姓名： | 袁强华 张刚台 穆保霞 王淑英 崔秀花 戴康 沈异凡 |
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| 作者单位： | 新疆大学物理系,新疆,乌鲁木齐,830046 |
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| 摘 要： | 研究了Cs(6P) Cs(6S) He→Cs(5D) Cs(6S) He的碰撞能量转移过程.单模半导体激光器共振激发Cs原子至6P3/2态,利用另一与泵浦激光束反向平行激光束作为吸收线探测6P3/2态原子密度及其空间分布.缓冲气体增大了6P3/2和6S1/2原子间的能量转移,这可从测量由Cs(6P)/Cs(5D)碰撞而被布居的7D态所发射的荧光得到证实.因5D→6P(3.0～3.6 μm)处于红外本实验不能探测,利用一个已经测量过的过程(即6P 5D→6S 7D)作相对测量.得到三体碰撞速率系数为(2.2±1.1)×10-28cm6s-1.
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| 关 键 词： | 光谱学 三体碰撞转移 荧光 |
| 文章编号： | 1007-5461（2006）05-0603-04 |
| 收稿时间： | 2005-06-10 |
| 修稿时间： | 2005-09-06 |
Three-body collisions in cesium vapour in the presence of buffer gas |
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| YUAN Qiang-hua,ZHANG Gang-tai,MU Bao-xia,WANG Shu-ying,CUI Xiu-hua,DAI Kang,SHEN Yi-fan. Three-body collisions in cesium vapour in the presence of buffer gas[J]. Chinese Journal of Quantum Electronics, 2006, 23(5): 603-606 |
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| Authors: | YUAN Qiang-hua ZHANG Gang-tai MU Bao-xia WANG Shu-ying CUI Xiu-hua DAI Kang SHEN Yi-fan |
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| Abstract: | An experimental study of energy transfer collisions,Cs(6P)+Cs(6S)+He→Cs(5D)+Cs(6S)+He,at thermal energies,was carried out in a cell. Atoms were excited to the 6P3/2 state using a single-mode diode laser. The Cs(6P)atom density and spatial distribution were mapped by monitoring the absorption of a counter-propagating laser beam. The buffer gas enhanced the energy transfer between Cs(6P)and Cs(6S),which was based on the measurement of the fluorescence from the 7D state populated by the Cs(6P)/Cs(5D)collisions. Since the 5D→6P fluorescence(3.0～3.6μm)can not be detected with this experiment,the rate coefficient has been measured relative to the known rate coefficient of the collision(i.e.,6P+5D→6S+7D). The three-body collision rate coefficient [k3 =(2.2±1.1)×10－28cm6s－1]is obtained. |
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| Keywords: | Cs |
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