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Optical Properties of Polyethylene: Measurement and Applications
L. R. Painter, E. T. Arakawa, M. W. Williams and J. C. Ashley
Vol. 83, No. 1 (Jul., 1980), pp. 1-18
Published by: Radiation Research Society
Stable URL: http://www.jstor.org/stable/3575254
Page Count: 18
You can always find the topics here!Topics: Polyethylenes, Electrons, Mean free path, Photons, Energy value, Stopping power, Electron energy, Optical properties, Material films, Dielectric materials
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The optical properties of polyethylene, obtained from transmission measurements on thin films, are presented for photon energies from 0.5 to 76 eV. The results for the extinction coefficient are combined with calculated values in the soft and hard X-ray regions, and both their internal consistency and their consistency with data obtained previously for polystyrene are verified through a sum rule calculation. Based on these optical data, the mean excitation energy for polyethylene is calculated to be 62 eV. A model insulator theory, with parameters fixed by the optical data, is employed to calculate inverse mean free paths and energy losses per unit pathlength for low-energy electrons (10 eV through 10 keV) in polyethylene.
Radiation Research © 1980 Radiation Research Society