Multisphere Neutron Spectrometric System with Thermoluminescence Dosemeters: Sensitive Improvement
| Autor: | J. J. Kunst, S. Papadopulos, J. A. Cruzate, B. Gregori |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Neutrons
Bonner sphere Radiation Materials science Radiological and Ultrasound Technology Spectrometer business.industry Spectrum Analysis Public Health Environmental and Occupational Health Reproducibility of Results General Medicine Sensitivity and Specificity Thermoluminescence Neutron temperature Neutron spectroscopy Nuclear physics Thermoluminescent Dosimetry Radiology Nuclear Medicine and imaging Neutron Thermoluminescent dosimeter Nuclear medicine business |
| Zdroj: | Radiation Protection Dosimetry. 101:133-136 |
| ISSN: | 1742-3406 0144-8420 |
| DOI: | 10.1093/oxfordjournals.rpd.a005953 |
| Popis: | In this work, a neutron spectrometric system based on a set of moderating spheres with thermoluminescence detectors (TLD) is presented. The system at the Nuclear Regulatory Authority (ARN) Dosimetry Laboratory consists of 12 solid spheres made of high-density polyethylene (p = 0.95 g x cm(-3)), with diameters ranging from 2" to 12" and TLD sensitive to thermal and gamma radiation, namely TLD-600 and TLD-700, located at the centre of the spheres. The neutron response matrix for this Bonner Sphere Spectrometer (BSS) was calculated using the MCNP-IVB code and the library ENDF/B-VI in the energy range between thermal neutrons and 100 MeV. The neutron spectrum was obtained using the LOUH182 unfolding code. The improvement in sensitivity of the system is based on the election of a different heating cycle of the TLD that allows an increase in sensitivity by a factor of 2.6 compared with the standard laboratory treatment. The system response for the calibration with an Am-Be source is presented. |
| Databáze: | OpenAIRE |
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