在本光譜學研究中，我們利用兩台脈衝式染料雷射進行雙光子共振螢光衰減光譜技術（Optical-Optical Double Resonance Fluorescence Depletion Spectroscopy）來偵測氣態氫化鈉分子高能位的C1＋電子態，我們採用疊加式雙光子激發（Stepwise OODR excitation）的方式進行實驗，並藉由檢測A1＋  X1＋的螢光衰減訊號來找尋C1＋電子態的振轉能級。
我們觀測的能量範圍位於36690 ~ 41500 cm-1總共得到v*－15 ~ v*－6及v*＋9 ~ v*＋17共19個振動量子數。觀測的轉動量子數分佈於J＝1 ~ 11中，共計有223個振轉能階被觀測到。其振動能階能量差ΔGv＋1/2分佈於189 ~ 89 cm-1中，轉動常數Bv則分佈於0.488 ~ 0.636 cm-1中。
未來期望能再加入更詳盡的實驗數據，且進一步確認絕對振動量子數v值並推得分子常數，使氫化鈉分子C1＋電子態的位能曲線更臻完整。

In this study, nineteen vibrational levels of the NaH C1＋ electronic state have been observed by the Optical-Optical Double Resonance Fluorescence Depletion Spectroscopy (OODR-FDS) technique. We applied the stepwise OODR excitation in our experiments. The OODR spectra of the NaH C1＋ electronic state have been taken by monitoring the fluorescence depletion of the A1＋ state to the X1＋ state.
We have observed 223 rovibrational levels (including 19 vibrational levels) of the C1＋ electronic state, they are in the range of 36690 ~ 41500 cm-1. The observed vibrational level spacings of ΔGv＋1/2 are in the range 189 ~ 89 cm-1and derived rotational constants Bv are 0.488 ~ 0.636 cm-1.
However, we have to confirm the absolute vibrational quantum number by a further study and the Dunham coefficients can be derived to construct the complete potential energy curve of the NaH C1＋ electronic state.

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