超冷铯分子纯长程态转动常数的精密测量  

Precise measurements of rotational constants of the pure long range state of ultracold cesium molecules

作　　者：马杰[1] 陈鹏[1] 刘文良[1] 冯国胜[1] 李玉清[1] 武寄洲[1] 肖连团[1] 贾锁堂[1] 

机构地区：[1]量子光学与光量子器件国家重点实验室,山西大学激光光谱研究所,太原030006

出　　处：《物理学报》2013年第22期137-142,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2012CB921603);国家自然科学基金(批准号:61008012,10934004)、国家自然科学基金国际(地区)合作与交流项目(批准号:2011DFA12490);国家高技术研究发展计划(批准号:2011AA010801);教育部新教师基金(批准号:20101401120004);山西省青年科技研究基金(批准号:2013021005-1)资助的课题~~

摘　　要：利用调制的俘获损耗光谱技术实验测量了超冷铯分子纯长程0g态的高分辨光谱.采用双光缔合光谱技术构建了精确的频率差参考信号,对转动能级的共振频率间隔进行了精确的标定,获得了转动能级频率间隔与转动量子数的关系.通过将实验数据拟合到非刚性转动模型,获得了超冷铯分子纯长程0g态不同振动态的转动常数.实验结果表明转动常数随振动量子数的增加而线性减小,线性递减率为0.41 MHz±0.01 MHz.The high resolution spectrum of ultracold Cs2 pure long range 0^-g state is experimentally measured using modulated trap loss spectroscopic technology. Based on Double photoassociation spectroscopic technique, precise frequency difference reference signals are constructed to accurately calibrate the resonant frequency intervals of the ro-vibrational levels, thus obtaining the relationship between the frequency interval of rotational level and the rotational quantum number. The experimental data are fitted by the non-rigid rotational model, and the molecular rotational constants corresponding to different vibrational levels in the ultracold Cs2 pure long range 0^-g state are acquired. The experimental results demonstrate a linear decrease of the rotational constant with the increase of vibrational quantum number, and the linear decreasing rate is？0.41 MHz ± 0.01 MHz.

关 键 词：双光缔合光谱技术 超冷铯分子 转动常数 纯长程态 

分 类 号：O561[理学—原子与分子物理]