Accession Number:

ADA250624

Title:

Surface Reactions in the Space Environment

Descriptive Note:

Final rept. 1 Nov 1989-30 Apr 1991,

Corporate Author:

VANDERBILT UNIV NASHVILLE TN CENTER FOR ATOMIC AND MOLECULAR PHYSICS AT SURFACES

Report Date:

1992-05-01

Pagination or Media Count:

12.0

Abstract:

The object of this research program is to carry out experimental and theoretical studies of the detailed microscopic mechanisms by which electronic energy is absorbed, transported and dissipated in ionic solids. The ultimate aim of this program is identify and characterize essential constituent elements of comprehensive models which will quantitatively describe radiation-induced electronic phenomena. The theoretical and experimental aspects of the project has been carried out concurrently and interactively in order to realize the greatest scientific benefit from the collaboration. Throughout this project we have employed 1 experimental techniques already developed to monitor bulk and surface properties before, during, and after electron and photon irradiation and to characterize time and energy-dependent desorption phenomena, and 2 ab initio quantum-theoretical approaches to develop and refine computational models for determining properties of excited electronic states of relevant localized species. This research program bears directly on a broad spectrum of questions germane to the long-term operation of platforms in space, including structural, optical and electronic degradation of materials in the ambient near-earth environment, survivability under and hardening against irradiation from directed-energy weapons, vulnerability in disturbed nuclear atmospheres, and discrimination and sensing techniques based on radiation glow signatures.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Radiation and Nuclear Chemistry
  • Solid State Physics
  • Astronautics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE