近三相点氮分子固体的低温红外吸收特性研究  

Infrared absorption characteristics of solid nitrogen at near-triple point temperatures

作　　者：曹山[1,2] 刘江平[2] 黎军[2] 王凯[2] 林伟[2] 雷海乐[2] 

机构地区：[1]西南科技大学,材料科学与工程学院,绵阳621010 [2]中国工程物理研究院,激光聚变研究中心,绵阳621900

出　　处：《物理学报》2015年第7期209-213,共5页Acta Physica Sinica

摘　　要：利用自主研制的低温液体/固体制备系统制备出了均匀、透光性好的氮分子固体冰层,测量了其近三相点的红外吸收谱,在频率2222—2439 cm-1处观察到了一个宽的吸收带,且最强峰位位于2288 cm-1.基于非谐振子模型计算了氮分子的振动频率,解释了实验中得到的固体中氮分子的红外吸收带主要由氮分子的基频振动及基频振动与转动耦合引起.The smooth, uniform, and transparent solid nitrogen-molecular film was grown by applying the slow thermal cycles near the triple-point temperature to the growth process in our home-made liquid/solid preparation apparatus. The infrared absorption spectra of solid nitrogen at near-triple point temperature are measured by the infrared spectroscopy system. A broad absorption band can be observed from 2222 to 2439 cm^-1with the strongest peak at 2288 cm^-1. This has been well explained theoretically on the basis of the ground-state vibration and the coupling between the ground-state vibration and rotation at low temperatures within the framework of anharmonic approximation.

关 键 词：低温 氮分子固体 红外吸收谱 振动频率 

分 类 号：O561.3[理学—原子与分子物理]