The use of large area silicon sensors for thermal neutron detection
| Autor: | M. Kesselman, F.R. Swanson, R.L. Schulte |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Physics
Nuclear and High Energy Physics Discriminator Silicon Physics::Instrumentation and Detectors business.industry Detector chemistry.chemical_element Thermal neutron detection Noise (electronics) Optics Planar chemistry Limit (music) Neutron detection High Energy Physics::Experiment business Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 353:123-127 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/0168-9002(94)91617-9 |
| Popis: | The use of large area planar silicon detectors coupled with gadolinium foils has been investigated to develop a thermal neutron detector having a large area-efficiency (Aϵ) product. Noise levels due to high detector capacitance limit the size of silicon detectors that can be utilized. Calculations using the Monte Carlo code, MCNP, have been made to determine the variation of intrinsic detection efficiency as a function of the discriminator threshold level required to eliminate the detector noise. Measurements of the noise levels for planar silicon detectors of various resistivities (400, 3000 and 5000 Ω cm) have been made and the optimal detector area-efficiency products have been determined. The response of a Si-Gd-Si sandwich detector with areas between 1 cm2 and 10.5 cm2 is presented and the effects of the detector capacitance and reverse current are discussed. |
| Databáze: | OpenAIRE |
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