O(1D)+Si(CH3)3Cl反应生成振动激发的OH(ν≤3)

The vibrationally excited OH(v) from the reaction of O(~1D)+Si(CH_3)_3Cl was observed by UV laser photolysis/FTIR emission spectroscopy. The vibrational number was only up to 3 with a ratio of 1:0.8:0.1 for v=1:2:3. Comparing this result with the similar reaction of O(~1D)+Si(CH_3)_4 which OH(v) vibrational number was high up to 4 with a ratio of 1:1:1:0.3 for v=1:2:3:4 under the same experimental conditions, it was found that the substitution of Cl for CH_3 affected the extent of heavy Si atom blocking the energy migration in a molecule. This results identifies the prediction that the characteristic of electrons in central atom plays an important role in intramolecular energy transfer.     

乙酰基和丙酰基紫外光解的研究

运用时间分辨红外发射光谱仪，研究了ＣＨ３ＣＯ和Ｃ２Ｈ５ＣＯ自由基在２４８ｎｍ的激光光解，观察到了高振动激发产物ＣＯ。光解机理的分析表明，光解可 资用能还未能在自由基内充分分散，很快发生了解离。     

塑料闪烁光纤用于放射性剂量探测的实验研究

设计并搭建了一套基于塑料闪烁光纤的放射性传感实验系统, 利用该装置进 行了放射性剂量测量实验,验证塑料闪烁光纤用于放射性探测领域的可行性和表现 。通过分析采 用脉冲计数和脉冲计数强度加权两种方法对在不同放射环境下测量获得的等效剂量曲线, 分辨出不同 放射环境下放射性剂量的差异,且等效剂量曲线呈现出良好的线性,拟合确定系数R²值＞99%。实验结果表明,基于 塑料闪烁光纤的放射性探测系统,在剂量传感方面具有一定有效的灵敏度和持续测量的稳定 性。     

紫外光激励产生高振动激发ν1模的NO2分子

The photon-excited NO2 at 308 nm has been investigated by Time-Resolved FTIR spectroscopy. The IR fluorescence from highly excited NO2(X2 A1) in ν1 vibrational mode has been observed. These excited states are resulted from the strong vibronic mixing of electronic excited A2 B2/B2 B1 states with the ground X2 A1 state. It is considered that symmetric stretching ν1 mode is reserved from the photolysis because its vibrational style is unsuitable for dissociation.     

激光光解CHBr3+O2体系的FTIR-TRS研究

紫外光解CHBr_3被认为是产生有着重要意义的CH 自由基的主要途径,Lin首先用闪光光解法研究了CHBr_3+O_2体系的真空紫外光解.我们用自行设计的分子光解时间分辨富里叶红外发射谱仪(FTIR-TRS),重新研究了这一体系在193nm 的光解反应,得出了一些与前人不同的结果.我们仪器的工作原理已做过详细的描述,这里在光解室里注入了混合的约5Pa 的CHBr_3(Baker 公司试剂,未进一步纯化)和230Pa 的O_2(北京氧气厂电子级高纯氧),用35mJ