Radiation Protection Dosimetry · 1999 · 13 citations · 0 references
EngineeringNuclear EngineeringPhysicsNuclear PhysicsRadiation DosimetryRadiation MeasurementDosimetry InstrumentationNeutron DetectionNuclear Material MeasurementProton DosimetryRadiation Detection PrinciplesReactor InstrumentationExperimental Results InterpretationFraunhofer DiffractionIrradiation ConditionsOblique AnglesSolid State Nuclear Track DetectionSolid-state Detector PhysicsSolid-state Track DetectorsSpatial Coherence
A new type of measurement has been proposed to evaluate the solid state nuclear track detector (SSNTD) CR-39 response in neutron dosimetry. It is based on coherent light scattering (He-Ne laser) by etched proton tracks caused by a neutron-proton (n.p) conversion. A track light diffraction model has been made through the use of Fraunhofer diffraction and the principles of spatial coherence and incoherence. The feasibility of the method is proven with proton irradiation under normal and oblique angles of incidence by comparing calculations and experimental results for the conical tracks. The measurement of coherent light scattering was then applied to the CR-39 samples irradiated by a neutron spectrum produced by a reactor.