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.
STOLARZ Anna;
SIBBENS Goedele;
DEAN Alan;
JOZWIK Michal;
AREGBE Yetunde;
ROEBBEN Gert;
2011-11-08
ELSEVIER SCIENCE BV
JRC64452
0168-9002,
www.elsevier.com/locate/nima,
https://publications.jrc.ec.europa.eu/repository/handle/JRC64452,
10.1016/j.nima.2011.06.015,
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