Data/hora: 11/06/2024 19:45:50

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 22/12/1999
Data da última atualização: | 09/03/2010
Autoria: | CARVALHO, A. A.; MASCARENHAS, S.; PAULA, M. H. de.
Afiliação: | UNESP-Campus de Ilha Solteira; EMBRAPA-CNPDIA.
Título: | A new pulsed photoacoustical radiation dosimeter.
Ano de publicação: | 1988
Fonte/Imprenta: | In: INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 4., Oct. 1988, São Paulo, SP. Book of abstracts... São Paulo: [s.n.], 1988.
Páginas: | p.II-26.
Idioma: | Inglês
Conteúdo: | We describe a new method to measure X-rays in its diagnostic region using a new photoacoustical radiation dosimeter. We measure the exposure rate and the energy fluence rate without the necessity to use synchronous detection. The measurement is made determining with a recorder, oscilloscope or electronic peak detector the amplitude of the electrical pulses produced when a chopped X-ray beam strikes a 0,6mm thick Pb detecting sample inside a photoacoustical cell. The pulsed photoacoustical radiation dosimeter (PPARD) consists of an X-ray beam commutator, a photoacoustical cell, a pre-amplifier and an electronic peak detector, oscilloscope or recorder. The PPARD has the following characteristics for diagnostic X-ray beam: 1) it has a linear response with the energy fluence rate; 2) the photoacoustic cell is simple to construct; 3) the instrumentation is inexpensive and easily available; 4) the lower detection limit of energy fluence rate range is 0,42W/m2; 5) the lower detection limit of exposure rate range is 2,0.10E-4 C.KgE-1.sE-1 (0,78 R/s).
Palavras-Chave: | Dosimeter; Photoacoustical; Pulsed; Radiation.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (5163-1) - UPC - SP - -- - PROCI-88.00009 -  - 1988.00009 - DIS