Neutron spectrometry of a lightly encapsulated 241 Americium–beryllium neutron source using two different Bonner Sphere Spectrometers
| Autor: | M.V. Introini, J.M. Gómez-Ros, Roberto Bedogni, Carles Domingo, Andrea Pola, Maite Romero-Expósito, I. Martínez-Rovira, Marco Costa, D. Bortot |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Bonner sphere
Physics Nuclear and High Energy Physics Bonner sphere spectrometer Spectrometer 010308 nuclear & particles physics chemistry.chemical_element Americium Radiation 01 natural sciences 030218 nuclear medicine & medical imaging Nuclear physics 03 medical and health sciences 0302 clinical medicine chemistry Americium–beryllium FRUIT unfolding Neutron spectrometry 0103 physical sciences Calibration Neutron source Neutron Beryllium Instrumentation |
| Popis: | 241Americium–beryllium neutron sources are used in a variety of applications, spanning from the civil engineering to the oil industry, and to the radiation dosimetry. The ISO 8529-1 Standard reports a reference distribution for the energy of the emitted neutrons, which extends from 0.1 to 11 MeV. Nevertheless every source exhibits a slightly different spectrum, depending on the material and dimension of the capsule, and on the amount of active material. This source-to-source variability is expected to mainly affect the energy region below 0.1 MeV. As these differences can be important in the fields of neutron dosimetry and metrology, some relevant source formats have been investigated with spectrometric methods. The neutron calibration laboratory of the Politecnico di Milano recently acquired a CZ/1003/S — 96 type 241 Am–Be source (nominal emission rate 2.2E+6 s−1). As this type of source is in use in a number of European laboratories, its spectrum was determined through a neutron spectrometry experiment, involving two Bonner sphere spectrometers with well-known responses. The experimental spectrum is compared to that published for a similar source and to the ISO-recommended one. |
| Databáze: | OpenAIRE |
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