Dynamics of Elementary Termolecular Reactions and Cluster Fragmentation
Abstract
A central element of this research project was the development of a new type of fast-ion beam spectrometer. The photoelectron-multiple photofragment spectrometer is a second-generation apparatus, and allows some of the first coincidence measurements of both synchronous and asynchronous three-body dissociation process in neutral molecules to be carried out. The ion source of the apparatus is similar to that previously used in our laboratory, and makes use of electron impact on a pulsed free jet expansion, followed by acceleration and mass-selection by time-of-flight. The apparatus features two opposed photoelectron detectors, orthogonal to the ion beam axis, which more than doubles the photoelectron detection efficiency compared to the first apparatus. The most unique aspect of the apparatus, though, is the multi-particle detector. This detector makes use of microchannel-plate particle amplification followed by time- and position-sensitive detection using a novel crossed-delay-line anode. The crossed-delay-line technology has been previously developed and applied to extreme ultraviolet astronomy using satellite-based detectors at the UC Berkeley Space Sciences Laboratory. Application of this technology to chemical dynamics has been carried out in our laboratory for the first time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 27, 2000
- Accession Number
- ADA376064
Entities
People
- Robert E. Continetti
Organizations
- University of California, San Diego