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本文通过测定甲酸铀酰[UO_2(HCOO)_2·H_2O]在290K-10K的红外光谱,确定了该化合物铀酰基团(O-U-O)v_(as)振动峰位,研究了温度对峰宽、峰位的影响,并采用差减及峰内标法估算了甲酸铀酰在290K-10K的同位素位移值。测得290K,77K及10K时~(238)U的v_(as)值分别为931.90cm~(-1),930.82cm~(-1)和930.74cm~(-1),~(235)U-~(238)U同位素位移△v分别为0.63cm~(-1),0.67±0.18cm~(-1)和0.71±0.21cm~(-1),位移值与理论计算值接近。
In this paper, the vibrational peak of v_ (as) of uranyl group (OUO) was determined by measuring the infrared spectrum of uranyl formate [UO_2 (HCOO) _2 · H_2O] at 290K-10K. The effect of temperature on the peak width, The effects of uranyl formate on 290K-10K isotopic shifts were estimated by subtraction and peak internal standard method. The v_ (as) values of ~ (238) U measured at 290K, 77K and 10K were 931.90cm -1, 930.82cm -1 and 930.74cm -1, respectively. The displacement of ~ (238) U isotopes were 0.63 cm -1, 0.67 ± 0.18 cm -1 and 0.71 ± 0.21 cm -1, respectively. The displacement values were close to the theoretical values.