A neutron scintillation detector based on a position-sensitive photomultiplier has been developed for neutron spin echo and small angle neutron scattering measurements. This photomultiplier has good spatial resolution, less than 1 mm2. The detection efficiency of gamma ray background is very low for using a thin ZnS/6LiF scintillator. The effective area of this detector is around 60 cm2.
An analysis method for evaluating a polycrystal structure under a surface using x-ray diffraction at small glancing angle incidence was studied. Intensities of the diffracted x-rays on a polycrystalline iron surface were measured at various incidence angles, and the dependency of the incidence angles was investigated by analysing the intensity of x-ray propagation in surface layer materials characterized by a complex refractive index that changes continuously with depth. The dependence of the diffracted x-ray intensities on the glancing angle was analysed and the depth profile of the polycrystalline layers of oxidized iron was evaluated to an accuracy of the order of nanometres.
Abstract-We are developing a fiber type two-dimentional (2-D) position-sensitive detector having a spatial resolution less than 0.5 mm in order to use it in the time-of-flight (TOF) measurements. The detector performance was examined, and some experiments on the TOF radiography were performed using this detector. The results indicated that the detector could be applied successfully to the TOF measurement and that the TOF radiography was very useful since it gave more informative data than those obtained by the conventional radiography using a broad energy band.Index Terms-Bragg cutoff, cold neutron, fiber type detector, material identification, spatial resolution, time-of-flight.
Phenomenological equations describing the Seebeck, Hall, Nernst, Peltier, Ettingshausen, and Righi-Leduc effects are numerically solved for the temperature, electric current, and electrochemical potential distributions of semiconductors under magnetic field. The results are compared to experiments.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.