Characterization of gamma rays existing in the NMIJ standard neutron field
| Autor: | Katsuhisa Kudo, Tetsuro Matsumoto, Akira Uritani, Y. Ito, Hideki Harano |
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| Rok vydání: | 2004 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
Physics::Medical Physics Nuclear Theory Radiation Dosage Neutron time-of-flight scattering Nuclear physics Radiation Protection Japan Neutron flux Neutron cross section Scattering Radiation Neutron detection Computer Simulation Radiology Nuclear Medicine and imaging Neutron Radiometry Nuclear Experiment Neutrons Physics Radiation Radiological and Ultrasound Technology Neutron stimulated emission computed tomography Public Health Environmental and Occupational Health Gamma ray General Medicine Reference Standards Equipment Failure Analysis Models Chemical Gamma Rays Neutron source Algorithms |
| Zdroj: | Radiation Protection Dosimetry. 110:69-72 |
| ISSN: | 1742-3406 0144-8420 |
| DOI: | 10.1093/rpd/nch208 |
| Popis: | Our laboratory provides national standards on fast neutron fluence. Neutron fields are always accompanied by gamma rays produced in neutron sources and surroundings. We have characterised these gamma rays in the 5.0 MeV standard neutron field. Gamma ray measurement was performed using an NE213 liquid scintillator. Pulse shape discrimination was incorporated to separate the events induced by gamma rays from those by neutrons. The measured gamma ray spectra were unfolded with the HEPRO program package to obtain the spectral fluences using the response matrix prepared with the EGS4 code. Corrections were made for the gamma rays produced by neutrons in the detector assembly using the MCNP4C code. The effective dose equivalents were estimated to be of the order of 25 microSv at the neutron fluence of 10(7) neutrons cm(-2). |
| Databáze: | OpenAIRE |
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