Title: Thin Tristearin Deposits as Solid Hydrogen-Rich Layers for Neutron Metrology
Authors: STOLARZ AnnaSIBBENS GoedeleDEAN AlanJOZWIK MichalAREGBE YetundeROEBBEN Gert
Citation: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SP vol. 655 no. 1 p. 34-40
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2011
JRC Publication N°: JRC64452
ISSN: 0168-9002
URI: www.elsevier.com/locate/nima
http://publications.jrc.ec.europa.eu/repository/handle/JRC64452
DOI: 10.1016/j.nima.2011.06.015
Type: Contributions to Conferences
Abstract: Layers of solid material with a relatively high, constant content of hydrogen that is stable over al long period of timer are needed for recoil proton telecscopes and for precise determination of the cross section ratio of 235U(n,f)/H(n,n). Thin layers of tristearin, a material that is relatively rich in hydrogen, have been prepared with an areal density of 0.05 mg cm-2 up to 0.5 mg cm-2 by evaporation in high vacuum. The surface quality was studied by AFM (atomic force microscopy). The tickness of the layers was estimated by several methods and its homogeneity was determined using an optical profilometer. The hydrogen amount in the deposited layer was estimated by combustion analyses.
JRC Institute:Institute for Reference Materials and Measurements

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