A New Desirable Molecular Species for Stark Deceleration  

作　　者：符广彬 邓联忠 印建平 

机构地区：[1]State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University,Shanghai 200062

出　　处：《Chinese Physics Letters》2008年第3期923-926,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10374029, 10434060 and 10674047, the National Key Basic Research Programme of China under Grant No 2006CB921604, and the Science and Technology Commission of Shanghai Municipality under Grant Nos 2006CB921604 and 07JC14017.

摘　　要：We demonstrate a new molecular sample （CH radical） for Stark deceleration by Monte Carlo simulation, study the dependences of the decelerating effect on the different phase angles, stage number and decelerating voltages, and obtain some new optimized conditions and parameters. We also calculate the Stark energy shift of different quantum states of CH radical in the Stark decelerator electrostatic field and their populations in a supersonic CH molecular beam. Our study shows that the mean velocity of the supersonic CH molecular beam in the 2^∏1/2 state can be decelerated from 380 m/s to 24 m/s, and the corresponding translation temperature is lowered from 2.8 K to 27mK. It is thus clear that the CH radical is a new and desirable candidate for Stark deceleration.We demonstrate a new molecular sample （CH radical） for Stark deceleration by Monte Carlo simulation, study the dependences of the decelerating effect on the different phase angles, stage number and decelerating voltages, and obtain some new optimized conditions and parameters. We also calculate the Stark energy shift of different quantum states of CH radical in the Stark decelerator electrostatic field and their populations in a supersonic CH molecular beam. Our study shows that the mean velocity of the supersonic CH molecular beam in the 2^∏1/2 state can be decelerated from 380 m/s to 24 m/s, and the corresponding translation temperature is lowered from 2.8 K to 27mK. It is thus clear that the CH radical is a new and desirable candidate for Stark deceleration.

关 键 词：CH SPECTROSCOPY 

分 类 号：O56[理学—原子与分子物理]