Abstract
abstract Radiation stability investigations in a form of hydrogen depletion of organic materials induced by afocussed 1.6 MeV He + scanning ion beam within a beam intensity range of 10–50 pA/ l m 2 is reported.The hydrogen depletion was measured by applying Elastic Recoil Detection Analysis (ERDA) and Ruther-ford Backscattering Spectrometry (RBS) techniques, simultaneously. H-count rates were measured andfurther processed as a function of the deposited ion beam fluence. Our results show, that within thedeposited fluence range of 10 14 –10 15 ions/cm 2 both the Kapton-foil and porphyrin complex (Fe(III)TPP)do not suffer from hydrogen depletion process, indicating only minor chemical structural changes. Thereis a slight decrease of the hydrogen content of the Mylar-foil while a remarkable loss of hydrogen occursin case of poly(dimethyl-siloxane) (PDMS) suggesting the degradation of the polymer chain. A fulldescription of our versatile and complex particle detection system for nuclear microprobe applicationsis also given in the paper. 2010 Elsevier B.V. All rights reserved.
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