交感冷却CaH $^+$的振动光谱
Vibronic spectroscopy of sympathetically cooled CaH$^+$
摘要：
我们报告的测量1 $^{1}Σ\longrightarrow$ 2 $^{1}Σ$跃迁的CaH $^+$的共振增强光解的CaH $^+$是与激光冷却的钙$^+$共捕获。我们观察到四个共振，我们分配到从振动的$v$ =0基态的$v'$ =1-4激发态的理论预测的基础上的过渡。一个简单的理论模型，假设瞬时解离后共振激发产率的结果与观察到的光谱特征，除了未观察到的$v'$ =0峰的良好协议。我们实验的分辨率受到锁模激发激光的限制，但这种调查光谱学使未来的旋转分辨研究在天体化学和精密测量中的应用成为可能。
英文摘要：
We report the measurement of the 1$^{1}Σ\longrightarrow$ 2$^{1}Σ$ transition of CaH$^+$ by resonance-enhanced photodissociation of CaH$^+$ that is co-trapped with laser-cooled Ca$^+$ . We observe four resonances that we assign to transitions from the vibrational $v$=0 ground state to the $v'$=1-4 excited states based on theoretical predictions. A simple theoretical model that assumes instantaneous dissociation after resonant excitation yield results in good agreement with the observed spectral features except for the unobserved $v'$=0 peak. The resolution of our experiment is limited by the mode-locked excitation laser, but this survey spectroscopy enables future rotationally resolved studies with applications in astrochemistry and precision measurement.
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