A new method for pulse analysis of driftless-gas proportional scintillation cou...

• Autor(es): Simões, P. C. P. S. ; Covita, D. S. ; Veloso, J. F. C. A. ; Santos, J. M. F. dos ; Morgado, R. E.
• Data: 2003
• Identificador Persistente: http://hdl.handle.net/10316/4474
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Xenon gaseous detectors; Gas proportional scintillation counters; Driftless; Pulse analysis
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

A new method for pulse analysis of driftless-gas proportional scintillation counters (GPSCs) is presented. With this method the requirement for additional analog or digital signal time-analysis and pulse-amplitude correction currently used is eliminated. In contrast to conventional- and driftless-GPSCs that have always relied on long shaping-time constants (several [mu]s), the use of very short linear amplifier shaping-time constants (~50 ns) enables pulse shapes to closely represent the scintillation light-pulse time-profile. Since the number of detected photons in the photosensor increases continuously with depth due to the increase in the solid angle subtended by the photosensor, a maximum is achieved when the primary electron cloud is closest to the anode. This maximum depends only on the number of primary electrons in that cloud, regardless of where the X-ray absorption took place, and is proportional to the X-ray energy. http://www.sciencedirect.com/science/article/B6TJM-486BN6Y-1C/1/d4c285545f4a2f1fb3da56268ff8df9f