依据LEPS ,运用经典轨线来研究振动激发和转动激发对吸热反应　Sr+HF(SrF +H ,ΔH0 =2 7.6 5 2±6 .6 88kJ/mol的影响 .计算结果表明 ,SrF产物的振动布居与激发无关 ,相对反应截面随碰撞能量地增加而增加 ,当碰撞能量增大到 48.0 7kJ/mol后 ,相对反应截面随碰撞能量地增加而下降 .计算结果基本符合实验结果 .我们初步地探讨了此反应的动力学 . According to LEPS, the influence of vibrational excitation and rotational excitation on the endothermic reaction of Sr + HF (SrF + H, ΔH0 = 2 7.65 2 ± 6.6888 kJ / mol) was studied by using classical orbitals.The calculated results show that the vibration of SrF product The relative reaction cross section increases with the collision energy, and the relative reaction cross section decreases with the increase of impact energy when the collision energy increases to 48.0 7 kJ / mol. The calculation results basically accord with the experimental results. The kinetics of this reaction was discussed.