在 1000eV 下甲烷离子的碰撞诱导解离中观察到 H3(+) 形成的异常反应途径的存在。

Existence of an exceptional reaction pathway for H3(+) formation observed in collision-induced dissociation of methane ions at 1000 eV.

机构信息

Graduate School of Engineering, Kyushu Kyoritsu University, Kitakyushu, Fukuoka 807-8585, Japan.

出版信息

J Chem Phys. 2011 Feb 14;134(6):064310. doi: 10.1063/1.3553200.

Abstract

Dissociation of CH(4)(+) ions at 1000 eV induced by collision with Ar atoms was investigated by measuring the kinetic energies of the ionized fragments. At small scattering angles, including zero, H(+), H(2)(+), H(3)(+), CH(3)(+), CH(2)(+), CH(+), and C(+) fragments were observed. The attractive part of the potential in the CH(4)(+)-Ar collision system played an important role in the formation of the ionized fragments. Rainbow scattering, leading to a large scattering cross section, was shown to be responsible for the increased formation of H(3)(+). It is proposed that on collision-induced dissociation of CH(4)(+), its three hydrogen atoms, which form a triangle, simultaneously react and move together to form H(3)(+).

摘要

通过测量离化碎片的动能，研究了 1000eV 时 CH(4)(+)离子与 Ar 原子碰撞导致的离解。在小散射角（包括零角）下，观察到了 H(+)、H(2)(+)、H(3)(+)、CH(3)(+)、CH(2)(+)、CH(+)和 C(+)碎片。在 CH(4)(+)-Ar 碰撞体系中，势的吸引部分在离化碎片的形成中起着重要作用。显示彩虹散射导致大散射截面，是 H(3)(+)形成增加的原因。据提议，在 CH(4)(+)的碰撞诱导离解中，它的三个氢原子形成一个三角形，同时反应并一起移动，形成 H(3)(+)。