Energetic distribution of the electrons from a 200 keV beam in polyurethane layers : EGS4 calculation and FTIR analysis期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Energetic distribution of the electrons from a 200 keV beam in polyurethane layers : EGS4 calculation and FTIR analysis

Authors:	B Ravat R Gschwind M Grivet E Duverger A Chambaudet L Makovicka

Institution:	^a Laboratoire de Microanalyses Nucléaires, CEA LRC M07, UFR ST, La Bouloie, 16 route de Gray, 25030 Besançon Cedex, France ^b Laboratoire de Métrologie des Interfaces Techniques, Place Tharradin, BP 427, 25211 Montbéliard Cedex, France

Abstract:	The aim of this study is to characterize the chemical transformation of a polymer resulting from irradiation by a 200 keV electron beam. Thermoplastic PU polyetherurethane material was used and irradiation was performed with applied electron fluences in the range of 10¹⁴–10¹⁷ electron cm⁻² at 77 K. The chemical changes have been observed by FTIR analysis of irradiated layers. A NH bond evolution study has allowed us to follow polymer degradation versus depth and fluence. The results have been compared to a simulation of electronic energy loss and to the energy spectrum of the generated electrons in the polymer using EGS4 code.

Keywords:	Polyurethane Electron beam Degradation IRTF spectroscopy EGS4-PRESTA code
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