应用变相法研究超冷镁原子的弹性散射特性  

Variable phase method used to calculate the elastic scattering properties of ultracold Mg atoms

作　　者：张计才[1] 杜丙阁[1] 孙金锋[1,2] 刘玉芳[1] 

机构地区：[1]河南师范大学物理与信息工程学院,新乡453007 [2]洛阳师范学院物理与电子科学系,洛阳471022

出　　处：《原子与分子物理学报》2010年第1期87-91,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10874064);河南省教育厅基础研究项目(2008A140007)

摘　　要：本文基于参考文献[5]构建的精确的基态Mg_2的势能曲线,应用变相法对超冷温度下Mg原子的弹性散射特性进行了系统的研究.计算得到Mg原子碰撞的散射长度和有效力程分别为25.9a_0和191.3a_0,其中a_0是玻尔半径;低能极限下镁原子间的弹性碰撞主要为s-波碰撞,同时计算得到的基态Mg_2支持束缚态的数目为19.计算结果与文献[5]和Numerov法所得结果一致.The calculation of the elastic scattering properties of ultracold Mg atoms is reported in detail. We show how to reach the scattering length and the number of bound states via the variable phase method, based on the potential curve constructed in Ref. [5]. The scattering length and the effective range of the Mg2 ground state are 25.9 a0 and 191.3 a0 , where a0 is the Bohr radius. The collisions of two Mg atoms at ultralow temperatures are dominated by s-wave scattering. The number of bound states is 19. Our results are in agreement with the calculated results in Ref. [5] and the results calculated by the Numerov method.

关 键 词：散射长度 Mg原子 变相法 

分 类 号：O562.5[理学—原子与分子物理]