High-Resolution Spectroscopy and Dynamics of Multiphoton Processes in Atoms and Molecules.
Abstract
This report summarizes research on resonantly enhanced multiphoton absorption, dissociation, and ionization processes in atoms and molecules. Multiphoton processes are studied using from one to three independently tunable visible and/or UV laser beams in order to establish both the underlying physics and the high degree of selectivity of multiphoton processes. Measurements are made to probe both the formation of excited molecular states and the subsequent behavior of excited states either in the presence or in the absence of further intense laser radiation. Detection methods include laser-induced fluorescence, ion mass analysis, and electron energy analysis. Resonant multiphoton ionization processes are studied for the H2, I, NO, NeXe, ArXe, KrXe, and Xe2 using both mass spectrometry and photoelectron spectroscopy to analyze the products of the ionizations. In addition, we are developing two new instruments that will provide significantly enhanced resolution, collection efficiency, and versatility in both the ion mass and the electron kinetic energy detection channels. Keywords: Multiphoton ionization; Multiphoton dissociation; Excited states, Rydberg states; Atomic spectroscopy; Molecular spectroscopy; Optical optical double resonance spectroscopy; Electron spectroscopy; Mass spectroscopy; Photoelectron angular distributions; Fluorescence spectroscopy; Laser induced fluorescence; and Molecular beams.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 02, 1986
- Accession Number
- ADA168189
Entities
People
- Joseph L. Dehmer
- Patricia M. Dehmer
Organizations
- Argonne National Laboratory