N₂O⁺ 离解复合过程的分支比和绝对截面

Branching ratios and absolute cross sections of dissociative recombination processes of N2O+.

作者信息

Hamberg M, Geppert W D, Rosén S, Hellberg F, Ehlerding A, Zhaunerchyk V, Kaminska M, Thomas R D, af Ugglas M, Källberg A, Simonsson A, Paal A, Larsson M

机构信息

Department of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden.

出版信息

Phys Chem Chem Phys. 2005 Apr 21;7(8):1664-8. doi: 10.1039/b417704e.

DOI:10.1039/b417704e

PMID:19787922

Abstract

We have investigated the dissociative recombination of the N2O+ ion using the CRYRING heavy-ion storage ring at the Manne Siegbahn laboratory in Stockholm, Sweden. The dissociative recombination branching ratios were determined at minimal (approximately 0 eV) collision energy, showing that the dominating pathways involved two-body fragmentation: N2 + O (48%) and NO + N (36%). The branching ratio of the three-body break-up 2N + O was 16%. The overall thermal rate coefficient of the title reaction follows the expression k(T) = 3.34 +/- 0.75 x 10(-7) (T/300) (-0.57+/- 0.03 cm3 s(-1)), which correlates perfectly with earlier flowing afterglow studies on the same process.

摘要

我们利用瑞典斯德哥尔摩曼内·西格巴恩实验室的CRYRING重离子储存环，研究了N2O+离子的离解复合过程。在最小（约0电子伏特）碰撞能量下测定了离解复合分支比，结果表明，主要的反应途径涉及两体碎裂：N2 + O（48%）和NO + N（36%）。三体分解2N + O的分支比为16%。本标题反应的整体热速率系数符合表达式k(T) = 3.34 +/- 0.75 x 10(-7) (T/300) (-0.57+/- 0.03 cm3 s(-1))，这与早期对同一过程的流动余辉研究结果完美相关。