(一)红外光谱:用几种高分辨傅里叶变换红外光谱仪重复研测全谱及各基团特征谱带,在290、77及10K温度下测得~(238)U的ν_3分别为931.905cm~(-1)、930.825cm~(-1)、930.745cm~(-1)。同位素位移与理论值颇接近。同时发现在77～10K,O—U—O各谱带产生约1cm~(-1)的“红移”,而非铀基团的各谱带却产生了较大“紫移”。研究了温度等对光谱的影响。 (A) Infrared spectroscopy: Several high-resolution Fourier transform infrared spectrometer repeated study of the full spectrum and the characteristics of each group spectral bands, measured at 290,77 and 10K temperature ~ (238) U ν_3 were 931.905 cm -1, 930.825 cm -1 and 930.745 cm -1. Isotopic displacement and the theoretical value is quite close. At the same time, it was found that the red shift of about 1 cm -1 was produced in each band of O-U-O at 77K to 10K, whereas the bands of non-uranium group produced larger “purple shift”. The effect of temperature on the spectrum was studied.