Ion‐molecule reactions and vibrational deactivation of H2+ ions in mixtures of hydrogen and helium
Ion‐molecule reactions and vibrational deactivation of H2+ ions in mixtures of hydrogen and helium
复制标题
氢氦混合物中 H2+ 离子的离子分子反应和振动失活
DOI：
10.1063/1.1681453
复制
发表时间：
1974
影响因子：
4.4
通讯作者：
W. Huntress
中科院分区：
文献类型：
--
作者：
L. P. Theard;W. Huntress
离子回旋共振技术已经被用来确定离子-分子反应的热能速率常数：（H2+）v+H2 → lim k1 H3 ++H，（H2+）v+ He → lim k2 HeH + + H，→ lim k3（H2+）v′ + He lim →He+ + H2 → lim k3 HeH + + H，HeH+ + H2 → lim k4 H3 + + He。对于H2中初始振动态的近Franck-Condon分布+ k1 = 2.08 ± 0.03，k2 =0.13 ± 0.01，k3 < 0.002，k4 = 1.83 ± 0.06×10 - 9 cm 3/分子·秒。振动激发的H2+离子的碰撞失活也发生在与He原子的非反应性遭遇。该过程的速率常数kν随着振动量子数ν的增加而增加，并且近似等于处于振动态ν的H2+离子的k2 v。
Ion cyclotron resonance techniques have been used to determine the thermal energy rate constants for the ion‐molecule reactions: (H2+)v+H2 → lim k1H3++H,(H2+)v+ He → lim k2HeH+ + H,→ lim kv (H2+)v′ + He lim →He+ + H2 → lim k3HeH+ + H,HeH+ + H2 → lim k4H3+ + He. For a near‐Franck‐Condon distribution of initial vibrational states in H2+ k1 = 2.08 ± 0.03, k2 =0.13 ± 0.01, k3 < 0.002, and k4 = 1.83 ± 0.06×10−9 cm3/molecule· sec. Collisional deactivation of vibrationally excited H2+ ions is also shown to occur in nonreactive encounters with He atoms. The rate constant kν for this process increases with increasing vibrational quantum number ν and is approximately equal to k2v for H2+ ions in vibrational state ν.