Modeling an Actinide-Based, Direct-Conversion Neutron Detector
Abstract
Direct-conversion, solid-state neutron detectors may be capable of detecting neutrons in a smaller volume with a much lower applied bias voltage than traditional high-efficiency neutron detectors. Significant progress has been achieved in synthesizing single-crystal uranium dioxide (UO2) and thorium dioxide (ThO2); however, the electrical properties of these actinide-based semiconductors are not well established. A method to model and assess the solid-state neutron detection potential of prototype samples is presented. The model development and verification process is described in detail, and the model is employed to estimate physical design constraints (i.e. thickness and contact diameter) for a UO2 detector. Actinide-based materials offer the potential for generating large energy pulses within the detection volume, but model results suggest that enhancing the materials electrical properties, to ensure the deposited energy is collected efficiently, is essential. When applicable, geometric design constraints should be applied to optimize detection efficiency.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 22, 2018
- Accession Number
- AD1056262
Entities
People
- Jay E. Ostler
Organizations
- Air Force Institute of Technology