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Grazing incidence prompt gamma emissions and resonance-enhanced neutron standing waves in a thin film

1994; American Physical Society; Volume: 72; Issue: 19 Linguagem: Inglês

10.1103/physrevlett.72.3044

1092-0145

Huai Zhang, Patrick Gallagher, Sushil K. Satija, Richard M. Lindstrom, Rick L. Paul, T. P. Russell, P. Lambooy, E. J. Kramer,

Material Properties and Processing

We report simultaneous measurements of neutron-capture prompt gamma emissions as well as neutron reflectivity on a polymer film with an embedded Gd layer. Enhanced \ensuremath{\gamma}-ray signals and reduced neutron reflectivity were observed when the neutron standing waves were resonantly amplified in the film. Fitting of both the \ensuremath{\gamma}-ray and reflectivity data is of significant aid in uniquely characterizing the depth profile of the polymer film as well as locating the Gd layer.