^(235)UF_6和^(238)UF_6同位素分子共振能量转移研究

Resonance Energy Transfer Study on ^(235)UF_6 and ^(238)UF_6 Isotopic Molecules

本文利用长程力碰撞理论计算了235 UF6和238 UF6同位素分子间ν3振动能量的近共振碰撞转移过程,得到了不同温度下共振函数随能量差变化的曲线,发现共振函数的宽度随温度的升高而增大。计算了不同温度下共振转移几率和共振转移速率,发现它们随温度的升高而减小。可见,235 UF6和238 UF6同位素分子的平动会降低其共振转移几率和共振转移速率,这为激光光化学法分离铀同位素提供了理论依据。

The resonant energy transfer process of ν3 vibration energy for 235 UF6 and 238 UF6 isotopic molecules was studied by long distance collision theory ,and the curves of resonance function with energy difference were obtained .The calculated result shows that the width of resonance function rises with the increase of temperature .In addition , the resonant transfer probability and rate were calculated under different temperatures , and it is found that they decrease with the increase of temperature and the translation of 235 UF6 and 238 UF6 isotopic molecules can reduce the resonant transfer probability and rate .These values can provide a reference for actual separation of uranium isotopes .