Photoassociation spectroscopy of ultracold Cs below the 6P(3/2) limit.
Photoassociation spectroscopy of ultracold Cs below the 6P(3/2) limit.
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DOI：
10.1063/1.1767071
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
M. Pichler;Hongmin Chen;W. Stwalley
中科院分区：
文献类型：
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作者：
M. Pichler;Hongmin Chen;W. Stwalley
在超冷铯气体中进行了高精度的光缔合光谱，失谐量在Cs（6S（1/2））+Cs（6P（3/2））渐近线以下51 cm（-1）。捕获损失荧光检测用于检测激发态超冷分子的光缔合。长振动级数被分配给0（g）（-），0（u）（+）和1（g）对称性的电子态。将光谱数据拟合到LeRoy-Bernstein方程，以获得主导长程相互作用项的有效系数（C（3）/R（3））和从解离开始测量的相对振动量子数。此外，我们提出了0（g）（-）状态和暗2（u）状态之间的扰动的证据。
High precision photoassociation spectroscopy is performed in ultracold cesium gas, with detunings as large as 51 cm(-1) below the Cs(6S(1/2))+Cs(6P(3/2)) asymptote. Trap-loss fluorescence detection is used for detecting the photoassociation to excited state ultracold molecules. Long vibrational progressions are assigned to electronic states of 0(g) (-), 0(u) (+), and 1(g) symmetry. The spectral data are fitted to a LeRoy-Bernstein equation, in order to obtain the effective coefficients of the leading long-range interaction term (C(3)/R(3)) and the relative vibrational quantum numbers measured down from dissociation. Additionally we present evidence for perturbations between the 0(g) (-) state and the dark 2(u) state.