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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
09/03/2010 |
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Autoria: |
CARVALHO, A. A.; MASCARENHAS, S.; PAULA, M. H. de. |
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Afiliação: |
UNESP-Campus de Ilha Solteira; EMBRAPA-CNPDIA. |
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Título: |
A new pulsed photoacoustical radiation dosimeter. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 4., Oct. 1988, São Paulo, SP. Book of abstracts... São Paulo: [s.n.], 1988. |
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Páginas: |
p.II-26. |
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Idioma: |
Inglês |
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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). |
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Palavras-Chave: |
Dosimeter; Photoacoustical; Pulsed; Radiation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01656naa a2200205 a 4500
001 1026546
005 2010-03-09
008 1988 bl --- 0-- u #d
100 1 $aCARVALHO, A. A.
245 $aA new pulsed photoacoustical radiation dosimeter.
260 $c1988
300 $ap.II-26.
520 $aWe 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).
653 $aDosimeter
653 $aPhotoacoustical
653 $aPulsed
653 $aRadiation
700 1 $aMASCARENHAS, S.
700 1 $aPAULA, M. H. de
773 $tIn: INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 4., Oct. 1988, São Paulo, SP. Book of abstracts... São Paulo: [s.n.], 1988.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 2 | |
| 1. |  | MATZEMBACKER, R. G.; PRIMAVESI, A. C. P. de A.; LAJUS, C. A.; BRUNING, G.; OLIVEIRA, J. C.; NORNBERG, J. L.; ROSA, J. L.; ALMEIDA, J. L.; MIRANDA, M.; OLIVEIRA, P. H. de; BASSO, S. M. S. Ensaio nacional de aveias de cobertura de 2003 - análise conjunta. In: REUNIÃO DA COMISSÃO BRASILEIRA DE PESQUISA DE AVEIA, 24., 2004, Pelotas. Resultados experimentais... Pelotas: UFPelotas, 2004. p. 453-460.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 2. | | MATZEMBACKER, R. G.; PRIMAVESI, A. C. P. de A.; LAJUS, C. A.; BRUNING, G.; OLIVEIRA, J. C.; NORNBERG, J. L.; ROSA, J. L.; ALMEIDA, J. L.; MIRANDA, M.; OLIVEIRA, P. H. de; BASSO, S. M. S. Ensaio nacional de aveias forrageiras de 2003 - análise conjunta. In: REUNIÃO DA COMISSÃO BRASILEIRA DE PESQUISA DE AVEIA, 24., 2004, Pelotas. Resultados experimentais... Pelotas: UFPelotas, 2004. p.461-466.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| Registros recuperados : 2 | |
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