Position sensitive GEM-based neutron detector prototype
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2020
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REUNIÃO DE TRABALHO SOBRE FÍSICA NUCLEAR NO BRASIL, 43.
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Resumo
In response to the 3He shortage [1], alternatives for thermal neutron detection
are being pursued nowadays. Elements such as 157Gd, 10B and 6Li are
commonly used to substitute 3He due to their high neutron capture cross section.
In this work, we present our thermal neutron detector prototype, which
makes use of 10B as converter. This detector works under Ar/CO2 (90/10)
open flux and uses two gas electron multipliers (GEMs) [2] microstructures to
multiply the charge signal. The neutrons are detected through the gas ionization
generated by the products of the 10B(n; a)7Li reaction. The neutron
capture takes place in the inside face of the aluminum cathode, which is coated
with a 2:2 μm thick 10B4C layer (deposition kindly provided by the European
Spallation Source (ESS) laboratories).
Experimental measurements obtained in the IEA-R1 nuclear research reactor,
at the Nuclear and Energy Research Institute (IPEN), shown that our
prototype presents high stability, position sensitivity with spatial resolution better
than 3mm and an efficiency of 2.97(25)%, allowing its application as beam
profiler. Methods to increase the neutron detection efficiency will then be discussed.
Como referenciar
SERRA FILHO, L.A.; BREGANT, M.; MUNHOZ, M.G.; SOUZA, F.A.; MORALLES, M. Position sensitive GEM-based neutron detector prototype. In: REUNIÃO DE TRABALHO SOBRE FÍSICA NUCLEAR NO BRASIL, 43., 14-16 de dezembro, 2020, Online. Resumo... São Paulo, SP: Sociedade Brasileira de Física, 2020. Disponível em: http://repositorio.ipen.br/handle/123456789/31836. Acesso em: 30 Dec 2025.
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.