PREPARATION AND PHOTODISSOCIATION OF $CH_{3}I^{+}$ BY MULTIPHOTON PROCESSES

Loading...
Thumbnail Image

Date

1983

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

Two--photon resonant multiphoton ionization has been used to prepare rotationally cooled and selected $CH_{3}I^{+}$ ions with controlled vibrational and electronic distributions. These ions are photodissociated by a second laser. The highly simplified photodissociation spectrum displays a clear dissociation threshold as well as bands hidden in earlier spectra. The data suggest corrections to previously determined vibrational constants. The electronic transition studied corresponds to excitation of a nonbonding $5p\pi$ electron to a 6s molecular Rydberg orbital on an ion core of the ground configuration. The bare ion core in this configuration has $^{2}\pi_{1/2}$ and $^{2}\pi_{3/2}$ sates which are separated by about $5000 cm^{-1}$ by strong spin orbit coupling. Time-of-flight photoelectron spectroscopy has been used to study the branching ratio of the channels to $\pi_{1/2}$ and $\pi_{3/2}$ ionization.

Description

Author Institution: Sterling Chemistry Laboratory, Yale University

Keywords

Citation