Molecular Resonances Observed in the Predissociation of Cs2

Bongsoo Kim,Keitaro Yoshihara

doi:10.1155/1995/79063

Bongsoo Kim, Keitaro Yoshihara

Open Access

https://doi.org/10.1155/1995/79063

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Abstract

Very cold molecular beam of Cs2 is generated by a high temperature supersonic jet source. State-specific photofragment yield spectrum is obtained in the orange band of Cs2. Asymmetric line shapes are observed. The Fano line shape parameter, q, shows a gradual sign change, which is called “q-reversal”. A very broad absorption band which has about 50 cm-1 width is observed and explained to occur through the perturbation by the D1∑u+ state. The complex resonance line shapes are attributed to the interfering resonances.

Highlights

In the last few years, we have seen increasing interest in a new field called ’transition state spectroscopy’, in which spectroscopic methods are used to probe directly the transition region of molecules where chemical bonds are about to form or break. 1,2 This ’transition-region species’, which refers to the short-lived molecular complex in this unstable region, is a quasibound state occurring when discrete states are coupled to a continuum, and can be called ’resonance’ in more general term
The lower trace is the photofragment yield (PFY) spectrum of Cs2, in which Cs (6 2P3/2) atom resulted from the photodis
Extra bands observed in the PFY spectrum at frequencies higher than 17100 cm-1 are due to the Cs ions fragmented from the Cs ions generated by two photon ionization and correspond to the vibrational progression of the D Z+ state

Summary

BONGSOO KIMa and KEITARO YOSHIHARA

Very cold molecular beam of Cs2 is generated by a high temperature supersonic jet source. State-specific photofragment yield spectrum is obtained in the orange band of Cs2. The Fano line shape parameter, q, shows a gradual sign change, which is called "q-reversal". A very broad absorption band which has about 50 cm-1 width is observed and explained to occur through the. The complex resonance line shapes are attributed to the interfering resonances

INTRODUCTION

IMC water LN

RESULTS AND DISCUSSION