由范德瓦尔斯系数C_6高精度确定铯原子主跃迁的跃迁振幅
High-precision determination of transition amplitudes of principal transitions in Cs from van der Waals coefficient C_6
摘要：
本文提出了一种由两个基态原子的分子势色散系数C_6值确定主跃迁的原子偶极矩阵元的方法。用高分辨Feshbach谱导出的C_6对Cs原子进行了计算。确定以下简化矩阵元素<6 S_{1/2}|| D|| 6 P_{1/2}>= 4.5028（60）|e| a0且<6 S_{1/2}|| D|| 6 P_{3/2}>= 6.3373（84）|e| a0（a0 = 0.529177 \times 10 ^{-8} cm.）这些矩阵元素与最精确的直接寿命测量结果一致，并且具有类似的不确定性。当系数C_6进一步受到约束时，不确定性将大大减小。
英文摘要：
A method for determination of atomic dipole matrix elements of principal transitions from the value of dispersion coefficient C_6 of molecular potentials correlating to two ground-state atoms is proposed. The method is illustrated on atomic Cs using C_6 deduced from high-resolution Feshbach spectroscopy. The following reduced matrix elements are determined < 6S_{1/2} || D || 6P_{1/2} > =4.5028(60) |e| a0 and < 6S_{1/2} || D || 6P_{3/2} > =6.3373(84) |e| a0 (a0= 0.529177 \times 10^{-8} cm.) These matrix elements are consistent with the results of the most accurate direct lifetime measurements and have a similar uncertainty. It is argued that the uncertainty can be considerably reduced as the coefficient C_6 is constrained further.
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