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- Title
Study of neutron scattering contribution on Hp(10) and H*(10) calibration in the Brazilian National Low Scattering Laboratory.
- Authors
Freitas, B. M.; Pereira, W. W.; Patrão, K. C. S.; Fonseca, E. S.; Mauricio, C. L. P.
- Abstract
The neutron scattering at the Low Scattering Laboratory of the Brazilian National Neutron Laboratory has been studied using three different methods. The measurements have been done with a traceable standard 241Am–Be from source-to-detector distances of 0.52–3.00 m. The obtained results with the variation distance methods are in agreement. Measurements with a large shadow cone are not worth for larger distances due to overshadowing. As the quantity required in a calibration is the response of the device being calibrated to the scattered neutron component in order to subtract this from the total response, for these purposes, the distance variation method must be used for each device. To quantify absolutely the scattering contribution on the quantity rates of fluence, Hp(10) and H*(10) in irradiation procedures, a Bonner sphere spectrometer with the shadow cone was employed. The evaluated scattering correction factor value may be employed for a distance of 1.00 m.
- Subjects
NEUTRON scattering; BONNER sphere spectrometers; IRRADIATION; CORRECTION factors; INTERNATIONAL Organization for Standardization
- Publication
Radiation Protection Dosimetry, 2014, Vol 161, Issue 1-4, p176
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncu195