Sub-Picosecond Laser Studies of Excited State Dynamics
Abstract
Apparatus for performing femtosecond transition-state absorption spectroscopy has been developed. The UV pump pulses rely upon amplification of femtosecond pulses in excimers. The probe pulses rely upon gas-phase continuum generation. Femtosecond transition-state absorption spectroscopy has been performed on Thallium, Sodium and Bismuth atoms produced by the 308-nm and 248- nm photodissociation of various gas-phase molecules, and also on CN radicals produced by UV photolysis of ICN. In the case of T1 and Bi, the transient spectra are all clearly identifiable as atomic, yet they display striking asymmetries in line shapes and enhancements in intensity that clearly demonstrate that they are spectral signatures of atoms still in the force fields of their receding partners. A new area of spectroscopy has thus been defined. Keywords: Diazahicyclooctane. (aw)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 1989
- Accession Number
- ADA214110
Entities
People
- J. H. Glownia
- J. Misewich
- P. P. Sorokin
Organizations
- International Business Machines Corporation (Armonk, NY)