Modelling of an IR scintillation counter

• Autor(a) principal: Fraga, M. M. F. R.
• Data de Publicação: 2000
• Outros Autores: Fraga, F. A. F., Policarpo, A. J. P. L.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10316/4536; https://doi.org/10.1016/S0168-9002(99)01267-X
• topic: Gaseous scintillators; Infrared emissions

A systematic study of the excitation and de-excitation mechanisms in ternary gas mixtures Ar+CO2+N2 is presented regarding the possibility of developing a proportional scintillation counter based on the detection of the infrared molecular emissions associated with the lowest vibrational states of molecules. The use of visible or near-infrared photons ([lambda]<1 [mu]m) for applications like imaging and quality control of microstructure detectors has been reported. In view of these applications we analyse the processes leading to near-infrared emissions in pure argon and give an estimation of the number of photons emitted per electron, at several pressures, as a function of the charge gain.