(DURIP98/99) Slow Positron Beam for Material and Surface Characterization

Abstract

A variable, mono-energetic slow positron beam (0-30 keV) coupled with Doppler broadening of annihilation radiation and positron lifetime measurements has been constructed at the University of Missouri-Kansas City. The beam is ideal for surface and materials characterization of defects of polymeric and coating materials in the range of sub-nanometer on the surface to a few microns in the bulk. This instrument becomes one of five slow positron beams currently available in the US for research on sub-nanometer defects and for training students and scientists in defense-related research. The performance of the beam, the counting rate and the resolution, is one of the best in the world.

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Document Details

Document Type
Technical Report
Publication Date
Aug 26, 2000
Accession Number
ADA382678

Entities

People

  • Thomas C. Sandreczki
  • Yanching C. Jean

Tags

DTIC Thesaurus Topics

  • Accelerated Testing
  • Annihilation Radiation
  • Beta Particles
  • Corpuscular Radiation
  • Degradation
  • Detectors
  • Ionizing Radiation
  • Materials
  • Measurement
  • Missouri
  • Nuclear Radiation
  • Polymer Degradation
  • Polymers
  • Positrons
  • Radiation
  • Schematic Diagrams
  • Universities

Fields of Study

  • Physics

Readers

  • Pulsed Power and Plasma Physics.
  • Semiconductor Device Technology
  • Solar Physics