Accession Number:

ADA155862

Title:

High-Resolution Spectroscopy and Dynamics of Multiphoton Processes in Atoms and Molecules.

Descriptive Note:

Annual summary rept. 1 Oct 84-30 Sep 85,

Corporate Author:

ARGONNE NATIONAL LAB IL

Personal Author(s):

Report Date:

1985-06-13

Pagination or Media Count:

19.0

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 andor 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 abscence of further intense laser radiation. Detection methods include laser-induced fluorescence, ion mass analysis, and electron energy analysis. During the current reporting period, we have studied resonant multiphoton ionization processes for the molecules N2, CO, O2, NO, NeXe, ArXe, KrXe, and Xe2 and for the atoms C, I, and S using both mass spectrometry and photoelectron spectroscopy to analyze the products of the ionizations. In addition, we are developing three 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 include double resonance spectroscopy, electron spectroscopy, molecular beams, rydberg states photoelectron angular, distributions. Author

Subject Categories:

  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE