Position sensitive GEM-based thermal neutron detector prototype with 10B4C converter
Carregando...
Data
Data de publicação:
2021
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
REUNIÃO DE TRABALHO SOBRE FÍSICA NUCLEAR NO BRASIL, 44.
Exportar
Resumo
In the last decade, several efforts have been made by the scientific community
to find alternatives to 3He, the most effective gas used for thermal neutron
detection, which is virtually extinct [1]. Common alternatives make use of isotopes
such 157Gd, 10B, and 6Li, due to their high neutron capture cross-section
[2].
We present in this work our detector prototype: a 10 cm x 10 cm double
GEM stack with an aluminum cathode, coated with a 2:2 μm thick 10B4C
layer deposited by the European Spallation Source (ESS). The detector operates
under ArCO2 (90/10) open flow at atmospheric pressure. The neutrons
are detected through the gas ionization charges created by the outcomes of the
10B(n;α)7Li capture reaction. These charges are collected in a 256x256 strip
readout plane produced by CERN, connected to resistive chains we designed
for this project and produced in the local industry. We tested the prototype
in the IPEN IEA-R1 nuclear reactor with a 1:4Å monochromatic neutron beam.
We will report experimental measurements showing that the prototype presented
high stability, position sensitivity with spatial resolution better than
3mm (obtained by 2 methods), detection efficiency of 2:66(30)%, and good
agreement with simulated results regarding the energy spectrum of the neutron
capture products. We will finally discuss further methods to be adopted for
enhancing detection efficiency.
Como referenciar
SERRA FILHO, L.A.; FELIX DOS SANTOS, R.; SOUZA, G.G.A. de; BREGANT, M.; MUNHOZ, M.G.; SOUZA, F.A.; MORALLES, M.; NATAL DA LUZ, H. Position sensitive GEM-based thermal neutron detector prototype with 10B4C converter. In: REUNIÃO DE TRABALHO SOBRE FÍSICA NUCLEAR NO BRASIL, 44., 9-11 de novembro, 2021, Online. Resumo... São Paulo, SP: Sociedade Brasileira de Física, 2021. Disponível em: http://repositorio.ipen.br/handle/123456789/33543. Acesso em: 12 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.