UO_2(HCOO)_2·H_2O在290K-10K的红外光谱及~(235)U-~(238)U同位素位移的研究

THE INVESTIGATION OF INFRA-RED SPECTRUM AND ISOTOPE SHIFT OF URANYL FORMATE IN SOLID STATE AT ROOM AND LOW TEMPERATURE

摘要: 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。
- 甲酸铀酰 /
- 红外光谱 /
- 同位素位移
Abstract: Infra-red spectra of uranyl formate at room and low temperature (10K) are studied to probe the effect of temperature on peak width and peak position of the spectra. The vas of vibrational peak position of uranyl group O-U-O is determined accurately. The isotope shift of uranyl formate is estimated with different vas of 235U and 238U. The vibrational modes vas of 235U are 931.90 cm-m, 930.82 cm-1 and 930.74 cm-1 at 290 K,77 K and 10 K respectively. Isotope shifts Av(235U-238U)are about 0.63 cm-1,0. 67±0. 18 cm-1 and 0.71±0.21 cm-1 respectively, which approximate the values calculated theoretically.
- Uranyl formate /
- IR Spectrum /
- Isotope shift.

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