| 超冷温度下钾和铯原子间弹性散射特性的精确计算 |
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| 引用本文： | 张计才,朱遵略,孙金锋.超冷温度下钾和铯原子间弹性散射特性的精确计算[J].物理学报,2012,61(9):93401-093401. |
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| 作者姓名： | 张计才 朱遵略 孙金锋 |
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| 作者单位： | 1. 河南师范大学物理与信息工程学院,新乡,453007
2. 河南师范大学物理与信息工程学院,新乡453007／洛阳师范学院物理与电子信息学院,洛阳471022 |
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| 基金项目： | 国家自然科学基金(批准号:10874064);河南省教育厅自然科学基金(批准号:2011A140017);河南师范大学青年基金(批准号:2010qk03)资助的课题~~ |
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| 摘 要： | 本文分别用量子方法和半经典方法计算了超冷钾和铯原子之间弹性碰撞的s波散射长度,有效力程和p波散射长度等散射参数. 超冷温度下39K-133Cs原子间的弹性散射截面主要为s波贡献,随着碰撞能量的增加散射截面有丰富的形状共振出现, 计算发现单重态和三重态截面分别存在显著的g波和d波形状共振.另外,本文应用简并内态近似方法获得了41K-133Cs 超精细态相互作用时的s波散射长度.
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| 关 键 词： | 冷原子碰撞 散射参数 弹性散射截面 形状共振 |
| 收稿时间： | 2011-05-31 |
Accurate calculation of elastic scattering properties of potassium and cesium atoms at ultracold temperatures |
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| Zhang Ji-Cai,Zhu Zun-Lue,Sun Jin-Feng.Accurate calculation of elastic scattering properties of potassium and cesium atoms at ultracold temperatures[J].Acta Physica Sinica,2012,61(9):93401-093401. |
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| Authors: | Zhang Ji-Cai Zhu Zun-Lue Sun Jin-Feng |
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| Institution: | 1)2)) 1)(College of Physics and Information Engineering,Henan Normal University,Xinxiang 453007,China) 3)(Department of Physics,Luoyang Normal College,Luoyang 471022,China) |
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| Abstract: | In this paper,we calculate the scattering parameters for collision between potassium and cesium atoms at ultracold temperatures, such as s-wave scattering length,effective range and p-wave scattering length,by the quantum method and semiclassical method, respectively.The singlet and the triplet elastic scattering cross sections between 39K and Cs atoms at ultracold temperatures are dominated by s-wave scattering,and shape resonance occurs with the increase of collision energy.There exist pronounced g-wave and d-wave shape resonances for the singlet and the triplet cross sections,respectively.In addition,s-wave scattering lengths are calculated by using the degenerate internet state approximation for selected hyperfine states of 41KCs. |
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| Keywords: | cold atom collision scattering parameters elastic scattering cross section shape resonance |
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