Thermal and fast neutron detection through high-purity single-crystal CVD diamonds
| Autor: | Chul-Yong Lee, Han-Rim Lee, Kee-Nam Choo, Chae-Min Ban, Byung-Hyuk Jun |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory engineering.material 010403 inorganic & nuclear chemistry 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Sputtering Neutron detection Nuclear Experiment Radiation business.industry Detector Gamma ray Diamond Neutron temperature 0104 chemical sciences Electromagnetic shielding Electrode engineering Optoelectronics High Energy Physics::Experiment business |
| Zdroj: | Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 152 |
| ISSN: | 1872-9800 |
| Popis: | We developed neutron detectors for detecting thermal and fast neutrons. The sensing element of the neutron detector uses a high-purity chemical-vapor-deposited (CVD) diamond plate, with a size of 3 mm × 3 mm × 0.5 mm, and the o5 mm detector is sealed for use in the reactor as a small tube by using laser micro welding. The electrodes of the fast and thermal neutron detectors are made up of Ag and Gd with approximately 100-nm and 5 μm thicknesses, respectively. The deposition method of the electrode uses the RF plasma sputtering system. The developed neutron detectors were tested on a 30-MeV cyclotron, which generates fast neutrons and gamma rays. High-density polyethylene plates, Cd plates, and Pb bricks were used for the moderator and shielding. The Ag electrode detector measured the current generated by fast neutrons and gamma rays. Although the sensitivity of the Gd electrode detector is smaller than that of the Ag electrode detector, it measured the current generated by thermal neutrons as well as fast neutrons and gamma rays. |
| Databáze: | OpenAIRE |
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