Laboratory Study of Collisions of Vibrationally Excited OH with O2 and O

该提案解决了航空社区和TIMED计划的三个需求。i)确定在中间层温度下O2对OH （u = 7,8和9）水平的去除率，要求的精度为15%。ii)测量O原子对各级振动激发OH的去除率，达到所需精度的50%。iii)研究OH（u = 7、8、9）能级振动能量碰撞去除的能量配置途径。目前，通过PI之前在室温下的测量，O2对OH （u= 7,8,9）水平的碰撞去除率仅为已知，精度分别为29%，13%和65%。当温度从310 K降低到223 K时，o2对OH （u = 10）的去除率提高了37%。没有测量或计算OH与O原子的振动能级的碰撞去除率。最后，振动能量去除的机制只是从模型研究中推导出来的，结果不确定。因此，如果TIMED计划的SABER实验要达到其精度目标并了解大气中OH排放的强度，则需要拟议的实验室测量

This proposal addresses three needs of the Aeronomy community and the TIMED program. i) Determine the removal rates for the OH (u = 7, 8, and 9) levels by O2 at mesospheric temperatures to the required accuracy of15%. ii)Measure the removal rate of various levels of vibrationally excited OH by O atoms to the required accuracy of 50%. iii) Study the pathways of energy disposition from the collisional removal of vibrational energy from the OH(u = 7, 8, and 9) levels. Currently, the collisional removal rates of the OH (u= 7, 8, and 9) levels by O2 are only known, through the PI's previous measurements at room temperature, to an accuracy of 29%, 13% and 65%, respectively. These measurements also showed that the rate for OH (u = 10) removal by 02 increased by 37% as the temperature was reduced from 310 K to 223 K. There are no measurements or calculations of the collisional removal rates for vibrational levels of OH by O atoms. Finally, the mechanisms for vibrational energy removal have only been deduced form modeling studies, with uncertain results. Thus, the proposed laboratory measurements are needed if the SABER experiment of the TIMED program is to meet its accuracy goals and to understand the intensity of OH emission in the atmosphere