Accession Number : ADA320716

Title :   Spectroscopy of Metal-Hydrogen Clusters.

Descriptive Note : Final rept. 30 Sep 92-31 Oct 96,

Corporate Author : CALIFORNIA INST OF TECH PASADENA DEPT OF CHEMISTRY

Personal Author(s) : Okumura, Mitchio

PDF Url : ADA320716

Report Date : 25 DEC 1996

Pagination or Media Count : 33

Abstract : Spectroscopic studies of clusters have been carried out in order to aid in the investigation of metal atom doping of solid hydrogen as a possible High Energy Density Material. The electronic spectra of small metal-atom clusters provides a well defined system for understanding the intermolecular forces between guest atoms and hosts and offers a stringent test of theoretical methods. In this work, a cluster beam spectroscopy apparatus was constructed to obtain spectra of clusters by laser-induced fluorescence and resonant multiphoton ionization. Electronic spectra were recorded for roughly size-selected clusters containing Al atoms bound to Ar clusters (containing up to 55 Ar atoms) by two photon ionization spectroscopy. The variations in band shifts and splittings provide an important measure of both cluster structure and perturbations of the atomic transitions. Efforts are now underway at Phillips Laboratory to test theoretical models of atom doping by comparing computed spectra with those reported here. In addition, laser-induced fluorescence spectra were observed and tentatively assigned to AlNe and Al-water.

Descriptors :   *METALS, *SPECTROSCOPY, *HYDROGEN, *CLUSTERING, MATHEMATICAL MODELS, METHODOLOGY, MODELS, LASER INDUCED FLUORESCENCE, WATER, MATERIALS, TEST METHODS, ATOMS, HIGH ENERGY, SPECTRA, ELECTRONIC STATES, ALUMINUM, RESONANCE, HIGH DENSITY, IONIZATION, PHOTONS, PERTURBATIONS, DOPING, PHOTOIONIZATION, ELECTRON TRANSITIONS, ARGON, NEON, SOLIDIFIED GASES.

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE