论文标题
温度依赖于oh-的旋转无弹性碰撞和他
Temperature-dependent rotationally inelastic collisions of OH- and He
论文作者
论文摘要
我们已经研究了OH- J = 0 <-> 1的基本旋转松弛和激发碰撞，并在不同的碰撞能量下使用氦气。使用状态选择的光检查中的低温离子陷阱中，已经研究了OH-的第一个激发旋转状态的碰撞激发，并且已经提取了绝对非弹性碰撞速率系数的绝对非弹性碰撞速率系数，以在20至35 K之间进行碰撞温度。与三种不同势能表面的准确量子散射相比，速率与精确的量子散射相比。在实验准确性中发现了良好的一致性，但是与温度碰撞率提高的实验趋势仅部分反映在计算中。
We have studied the fundamental rotational relaxation and excitation collision of OH- J=0 <-> 1 with helium at different collision energies. Using state-selected photodetachment in a cryogenic ion trap, the collisional excitation of the first excited rotational state of OH- has been investigated and absolute inelastic collision rate coefficients have been extracted for collision temperatures between 20 and 35 K. The rates are compared with accurate quantum scattering calculations for three different potential energy surfaces. Good agreement is found within the experimental accuracy, but the experimental trend of increasing collision rates with temperature is only in part reflected in the calculations.
