Bubble detector's evaluation for neutron field measurements in a very known source

• Autor(a) principal: Ramalho, Eduardo
• Data de Publicação: 2011
• Outros Autores: Reina, Luiz, Silva, Ademir, Facure, Alessandro, Instituto de Engenharia Nuclear, Universidade Federal do Rio de Janeiro, Comissão Nacional de Engenharia Nuclear, Centro Federal de Educação Tecnológica Celso Sukow da Fonseca
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional do IEN
• Texto Completo: http://carpedien.ien.gov.br:8080/handle/ien/2458
• topic: INAC 2011; Bubble Detector Spectrometer; Neutron dosimetry

Measurements on neutron fields, mainly for dosimetric purposes, have been a major concern for ionizing radiation workers, because of the radiation protection issues. The present work aims to study the using of bubble detectors in neutron dosimetry and the Bubble Detector Spectrometer (BDS) was chosen for this task. Several experiments were performed in order to obtain spectra from such devices and their respective analysis and then they were compared to those which were obtained by other ways. An Am-Be calibration neutron source from Instituto de Radioproteção e Dosimetria / Comissão Nacional de Energia Nuclear (IRD/CNEN) was used and its spectrum was compared to the one obtained by BDS. The possibility of the use of such devices as ambient dosimeters was also evaluated. Despite the uncertainties, especially in the lowest energy thresholds, the spectrum from BDS is in good agreement with the known ones and the use of BDS as a dosimeter demands a more detailed study due to some characteristics of the Am-Be source that produce high uncertainties in lowenergy thresholds.