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超低温下钠原子散射特性研究(英文) 被引量：2

Elastic scattering of sodium atoms at ultracold temperatures
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摘要 超低温下钠原子的散射特性对原子间的相互作用势非常敏感.本文基于构造精确的原子间相互作用势,详细研究了在超冷温度下处在超精细态|F=2,mF=2〉下23Na原子的弹性散射特性.我们分别用Numerov和半经典方法计算了散射长度和有效程,得到了较满意的结果.低能散射截面有丰富的共振现象产生,我们发现并给出了d-波和g-波形状共振的能级位置和共振宽度;此外,我们还对仅两个分波有贡献情况下的微分散射截面进行了理论计算. The calculations of the elastic scattering properties for collisions between two 23^ Na atoms at ultracold temperatures are reported and compared with experimental and theoretical results in the detail.We present a parametric model potential for the triplet molecular state of the 23 ^Na molecule,and calculate the scattering length at and the effective range re by using the semiclassical and Numerov methods,respectively.The shape resonances occur in the collisions at low energies,and resonance positions and widths are computed by Briet Wigner formula.In addition,we also present other results that include differential cross sections at zero energy limit.
作者 张计才 孙金锋 王杰敏
机构地区 河南师范大学物理与信息工程学院
出处 《原子与分子物理学报》 CAS CSCD 北大核心 2007年第1期16-20,共5页 Journal of Atomic and Molecular Physics
基金 国家自然科学基金(10574039)
关键词 散射长度 弹性散射截面 Numerov法 形状共振 scattering length,elastic cross section,Numero v method,shape resonance
分类号 O562.5 [理学—原子与分子物理]
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参考文献20

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同被引文献38

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原子与分子物理学报
2007年 第1期

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