Investigation of the isomerization reaction dynamics of HCP molecule

我们一直在研究HCP的异构化光谱。在本研究中，我们计划的氘代效应的HCP CPH异构化反应动力学的调查。然而，氘代HCP的合成是非常困难的，因此，我们对HCP在异构化势垒附近的激发振动能级进行了观测。最近，对HCP异构化反应的理论研究有了新的报道。这一理论工作对我们的研究有启发作用。据此，H原子绕CP核转动的振动能级与低能区的有效转动常数相比，应该具有很大的有效转动常数。我们可以在异构化势垒以上的能量区域观察到几个振动能级。其中一些能级具有非常大的转动常数，其值比振动基态能级大15%。我们的观测结果与理论预测完全一致。现在，我们正在准备一个新的实验，提供一些关于异构化势垒以上振动能级中振动运动的信息。

We have been studying the isomerization of HCP spectroscopically. In the present study, we planned the investigation of the deutration effect on the reaction dynamics of HCP CPH Isomerization. However, it was very difficult to synthesize the deutrated HCP.In stead, we have carried out the observation of the excited vibrational levels of HCP near the isomerization barrier. Very recently, an interest theoretical study on the Isomerization of HCP was reported. This theoretical work shed a light in our study. According to it, the vibrational level where the H atom rotates around the CP core should have very large effective rotational constants compared with those in the low energy region. We could observe several vibrational levels in the energy region above the Isomerization barrier. Some of these levels have a very large rotational constant, the value of which is 15 % larger than that of the vibrational ground level. Our observation well agrees with the theoretical prediction. Now, we are preparing a new experiment that provides some information about the vibrational motion in the vibrational levels above the isomerization barrier.