Inelastic scattering of electron and light ion beams in organic polymers

We have calculated the inelastic mean free path, stopping power, and energy-loss straggling of swift electron, proton, and α -particle beams in a broad incident energy range in four organic polymers: poly(methyl methacrylate) (PMMA), Kapton, polyacetylene (PA), and poly(2-vinylpyridine) (P2VP). Thes...

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Bibliographic Details
Published in:Journal of applied physics 2011-05, Vol.109 (9), p.094901-094901-8
Main Authors: de Vera, Pablo, Abril, Isabel, Garcia-Molina, Rafael
Format: Article
Language:English
Subjects:
ALPHA PARTICLES
BEAMS
CALCULATION METHODS
CHARGED PARTICLES
COLLISIONS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LOSSES
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
ESTERS
EXCITATION
FERMIONS
INELASTIC SCATTERING
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONIZING RADIATIONS
IONS
LEPTON BEAMS
LEPTONS
LIGHT IONS
LOSSES
MEAN FREE PATH
MOLECULE COLLISIONS
MONTE CARLO METHOD
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
PARTICLES
PHYSICAL PROPERTIES
PMMA
POLYACRYLATES
POLYMERS
POLYVINYLS
RADIATIONS
SCATTERING
SPECTRA
STOPPING POWER
STRAGGLING
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Summary:We have calculated the inelastic mean free path, stopping power, and energy-loss straggling of swift electron, proton, and α -particle beams in a broad incident energy range in four organic polymers: poly(methyl methacrylate) (PMMA), Kapton, polyacetylene (PA), and poly(2-vinylpyridine) (P2VP). These calculations have been done through a suitable description of their optical properties and its extension into the whole momentum and energy transfer excitation spectrum. For electrons, we take into account the exchange effect between the projectile and the target electrons, while the charge-state fractions have been considered for ions. Our results are compared with other models and with the available experimental data. An excellent agreement with experimental data is obtained in the case of proton and α -particle beams in Kapton and a reasonably good agreement has been achieved for electron beams in PMMA, Kapton, and PA. We have parameterized by means of simple analytical expressions our results for electron beams interacting with these four polymers, which can be easily implemented in Monte Carlo calculations.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3581120