通过 Ã-X 跃迁光解 NO-RG 后形成 RG+：速度图成像研究。

RG+ formation following photolysis of NO-RG via the Ã-X transition: a velocity map imaging study.

机构信息

Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom.

出版信息

J Chem Phys. 2011 Jul 21;135(3):034308. doi: 10.1063/1.3610415.

DOI:10.1063/1.3610415

PMID:21787004

Abstract

Kr(+) and Xe(+) formation following photodissociation of NO-RG (RG = Kr or Xe) molecules via the Ã-X electronic transition in the 44,150-44,350 cm(-1) region has been investigated using velocity map imaging. Nuclear kinetic energy release (nKER) spectra indicate that the NO cofragment is produced in multiple vibrational states of the electronic ground state, with a high degree of rotational excitation. Photofragment angular distributions and nKERs are consistent with photo-induced charge transfer at the two-photon level followed by dissociative ionization at the three-photon level. RG(+) angular distributions showing highly parallel character relative to the laser polarization axis are indicative of a high degree of molecular alignment in the dissociating species.

摘要

采用速度成像方法研究了在 44150-44350 cm(-1) 区域通过 Ã-X 电子跃迁光解 NO-RG（RG=Kr 或 Xe）分子后 Kr(+)和 Xe(+)的形成。核动能释放（nKER）谱表明，NO 共碎片以电子基态的多个振动态产生，具有高度的转动激发。光碎片角分布和 nKER 与双光子水平的光诱导电荷转移以及随后的三光子水平的离解电离一致。相对于激光偏振轴具有高度平行特征的 RG(+)角分布表明在离解物种中存在高度的分子取向。