Vibronic Spectroscopy of Sympathetically Cooled CaH.

Vibronic Spectroscopy of Sympathetically Cooled CaH.
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交感冷却 CaH 的电子振动光谱。

DOI:
10.1002/cphc.201600645
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发表时间:
2016
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
K. Brown
K. Brown
中科院分区:
--
文献类型:
--
作者:
R. Rugango;A. Calvin;S. Janardan;G. Shu;K. Brown

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本文报道了用共振增强光解方法测量了激光冷却Ca ~(2+)与CaH ~(2+)共俘获的CaH ~(2+)的11 π →21 π跃迁。我们观察到四个共振,根据理论预测,我们将其分配给从振动v=0基态到v '= 1-4激发态的跃迁。一个简单的理论模型,假设瞬时解离后共振激发产生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。这种差异是由于对解离过程的理解不足,需要进一步的实验和理论研究来确认分配。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。
We report the measurement of the 11 Σ→21 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 yields results in good agreement with the observed spectral features except for the unobserved v'=0 peak. This discrepancy is attributed to an insufficient understanding of the dissociation process, and further experimental and theoretical studies are required to confirm the assignment. 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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