Studies of the Interactions of Ionizing Radiations with Communications Materials.
Abstract
This report summarizes experimental and theoretical studies designed to yield information on the interaction of ionizing radiations with various communications materials. The optical properties of Kapton have been measured over the energy range from 0.5 eV to 76 eV. Theoretical models combined with experimental optical data have been used to calculate mean excitation energies, mean free paths, and stopping powers for low-energy electrons (100 eV to 10 keV) in various solid organic insulators. The contribution to both the mean free path and stopping power due to K-shell ionizations in carbon, nitrogen, and oxygen where then obtained from theoretical atomic generalized oscillator strengths and added to the valence electron contributions. A model involving the diffusion of excitons has been proposed to explain data, reported in the literature, showing that a thin metallic surface layer may partially protect organic crystals against radiation damage. The stopping powers of several metals for electrons have been calculated from an electron gas statistical model and used to calculate the continuous slowing-down-approximation range and range straggling for electrons with energies < or = 10 keV. Microdosimetric calculations have been made of the structure of heavy-ion tracks in silicon. Results show that these tracks are very small in lateral extent compared with the dimensions of critical volumes in currently used microelectronic components.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1980
- Accession Number
- ADA093106
Entities
People
- J. C. Ashley
- M. W. Williams
Organizations
- Rome Laboratory