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首页> 外文期刊>Physical Review, A >Ground-state properties of Ca_2 from narrow-line two-color photoassociation
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Ground-state properties of Ca_2 from narrow-line two-color photoassociation

机译：窄线两彩光腺癌CA_2的地线特性

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By two-color photoassociation of ~(40)Ca four weakly bound vibrational levels in the Ca_2 X ~1∑_g~+ ground-state potential were measured, using highly spin-forbidden transitions to intermediate states of the coupled system ~3∏_u and 3∑_u~+ near the ~3P_1 + ~1S_0 asymptote. From the observed binding energies, including the least bound state, the long-range dispersion coefficients C_6,C_8,C_(10) and a precise value for the s-wave scattering length of 308.5(50)a_0 were derived. Frommass scaling we also calculated the corresponding scattering length for other natural isotopes. From the Autler-Townes splitting of the spectra, the molecular Rabi frequency has been determined as a function of the laser intensity for one bound-bound transition. The observed value for the Rabi frequency is in good agreement with calculated transition moments based on the derived potentials, assuming a dipole moment being independent of internuclear separation for the atomic pair model.
机译：通过双彩色光学播放〜（40）CA，测量了CA_2 x〜1σ_g〜+地区电位中的四个弱束效率，使用高旋转禁止的转换到耦合系统的中间状态〜3π_U 和3σ_u〜+靠近〜3p_1 +〜1s_0渐近。 从观察到的绑定能量，包括最小界定状态，远程色散系数C_6，C_8，C_（10）和S波散射长度为308.5（50）A_0的精确值。 从缩放中，我们还计算了其他天然同位素的相应散射长度。 根据谱的自动柱分裂，分子Rabi频率已经确定为一个绑定的过渡的激光强度的函数。 假设偶极力矩与原子对模型的核心分离无关，因此观察到的Rabi频率的值与基于衍生电位的计算过渡瞬间吻合良好。

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