Photoassociative spectroscopy as a self-sufficient tool for the determination of the Cs triplet scattering length
Photoassociative spectroscopy as a self-sufficient tool for the determination of the Cs triplet scattering length
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DOI：
10.1103/physrevlett.85.1408
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发表时间：
2000-08
影响因子：
8.6
通讯作者：
Cyril Drag;B. L. Tolra;B. T'Jampens;D. Comparat;Maria Allegrini;A. Crubellier;Pierre Pillet
中科院分区：
文献类型：
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作者：
Cyril Drag;B. L. Tolra;B. T'Jampens;D. Comparat;Maria Allegrini;A. Crubellier;Pierre Pillet
在光缔合光谱中，给定振动级数的线强度表现出零信号调制，反映了两个自由碰撞原子的s波基态波函数的节点结构。这导致散射长度的确定。我们对在塞曼子能级f = 4，m（f）= 4中极化的冷Cs原子进行了光缔合。我们分析了Cs2 0（-）（g）态离解到6s（1/2）+6p（3/2）渐近线的谱线强度。这产生Cs三重态散射长度的值a（T）= -530a（0），而一致性要求强加多极基态分子系数的值C6 = 6510 a.u.
In photoassociation spectroscopy, the line intensities of a given vibrational progression exhibit zero-signal modulation reflecting the node structure of the s-wave ground state wave function of two free colliding atoms. This leads to the determination of the scattering length. We performed photoassociation of cold Cs atoms polarized in the Zeeman sublevel f = 4, m(f) = 4. We analyzed the intensities of the lines associated with the Cs2 0(-)(g) state dissociating to the 6s(1/2)+6p(3/2) asymptote. This yields a value of the Cs triplet state scattering length, a(T) = -530a(0), while consistency requirements impose a value of the multipole ground state molecular coefficient, C6 = 6510 a.u.