Title: A quantum-mechanical investigation of O($^3P$) + CO scattering cross sections at superthermal collision energies Show Chinese title

Title: 超热碰撞能量下O($^3P$) + CO 散射截面的量子力学研究

Abstract: The kinetics and energetic relaxation associated with collisions between fast and thermal atoms are of fundamental interest for escape and therefore also for the evolution of the Mars atmosphere. The total and differential cross-sections of fast O($^3P$) atom collisions with CO have been calculated from quantum mechanical calculations. The cross-sections are computed at collision energies from 0.4 to 5 eV in the center-of-mass frame relevant to the planetary science and astrophysics. All the three potential energy surfaces ($^3$A', $^3$A" and 2 $^3$A" symmetry) of O($^3P$) + CO collisions separating to the atomic ground state have been included in calculations of cross-sections. The cross-sections are computed for all three isotopes of energetic O($^3P$) atoms collisions with CO. The isotope dependence of the cross-sections are compared. Our newly calculated data on the energy relaxation of O atoms and their isotopes with CO molecules will be very useful to improve the modeling of escape and energy transfer processes in the Mars' upper atmosphere. Show Chinese abstract

Abstract: 与快速原子和热原子之间的碰撞相关的动力学和能量弛豫从根本上影响逃逸过程，因此也对火星大气的演化具有重要意义。 已经从量子力学计算中得出了快速O($^3P$)原子与CO分子碰撞的总截面和微分截面。 在与行星科学和天体物理学相关的质心参考系中，以从0.4到5电子伏特的碰撞能计算了这些截面。 在计算截面时包含了O($^3P$) + CO碰撞分离到原子基态的所有三条势能曲面（分别是$^3$A',$^3$A" 和 2$^3$A" 对称性）。 对于高能O($^3P$)原子的所有三种同位素与CO分子碰撞的截面进行了计算。 比较了截面的同位素依赖性。 我们新近计算的O原子及其同位素与CO分子的能量弛豫数据将非常有助于改进对火星高层大气中逃逸和能量传递过程的建模。