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Registro Completo |
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 pyroelectric 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-25. |
Idioma: |
Inglês |
Conteúdo: |
We describe a new type of radiation dosimeter for the diagnostic X-ray region using a pyroelectric detector. The pulsed pyroelectric radiation dosimeter (PPERD) is a system constituted by a X-ray beam commutator, a pyroelectric chamber, a pre-amplifier and an electronic peak detector. The pyroelectric chamber consists basically of a lead zirconium titanate (PZT) ceramic (17mm x 17mm and 3mm thick) on a nylon support. The chamber is evacuated to about 1mm Hg. The thickness of the detector is such that it absorbed more than 99% of the X-ray beam used in these studies. The pyroelectric element itself absorbs a X-ray pulse and provides a voltage proportional to the energy absorbed. The PPERD has the following characteristics for diagnostic X-ray beams: 1) it responds linearly to the radiation intensity for a given radiation spectrum; 2) it responds linearly to the radiatin energy fluence rate; 3) the pyroelectric chamber is simple to construct, inexpensive and rugged; 4) the lower detection limit of energy fluence rate range and of exposure rate range are respectively 20mW/m2 and 9,0.10E-6C.KgE-1 sE-1 (35mR/s). |
Palavras-Chave: |
Dosimeter; Pulsed; Pyroelectric; Radiation. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01716naa a2200205 a 4500 001 1026547 005 2010-03-09 008 1988 bl --- 0-- u #d 100 1 $aCARVALHO, A. A. 245 $aA new pulsed pyroelectric radiation dosimeter. 260 $c1988 300 $ap.II-25. 520 $aWe describe a new type of radiation dosimeter for the diagnostic X-ray region using a pyroelectric detector. The pulsed pyroelectric radiation dosimeter (PPERD) is a system constituted by a X-ray beam commutator, a pyroelectric chamber, a pre-amplifier and an electronic peak detector. The pyroelectric chamber consists basically of a lead zirconium titanate (PZT) ceramic (17mm x 17mm and 3mm thick) on a nylon support. The chamber is evacuated to about 1mm Hg. The thickness of the detector is such that it absorbed more than 99% of the X-ray beam used in these studies. The pyroelectric element itself absorbs a X-ray pulse and provides a voltage proportional to the energy absorbed. The PPERD has the following characteristics for diagnostic X-ray beams: 1) it responds linearly to the radiation intensity for a given radiation spectrum; 2) it responds linearly to the radiatin energy fluence rate; 3) the pyroelectric chamber is simple to construct, inexpensive and rugged; 4) the lower detection limit of energy fluence rate range and of exposure rate range are respectively 20mW/m2 and 9,0.10E-6C.KgE-1 sE-1 (35mR/s). 653 $aDosimeter 653 $aPulsed 653 $aPyroelectric 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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Registros recuperados : 91 | |
42. | | CRESTANA, S.; MASCARENHAS, S.; CRUVINEL, P. E.; CESAREO, R. Estudos de germinação e crescimento de uma planta utilizando um minitomógrafo de raios gama. In: REUNIÃO ANUAL DA SBPC, 39., 1987, Brasília, DF. Ciência e Cultura, São Paulo, v.39, n.7, p.337, jul. 1987. Suplemento. Resumos. ref.03-D.1.12.Biblioteca(s): Embrapa Instrumentação. |
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58. | | CRESTANA, S.; CRUVINEL, P. E.; VAZ, C. M. P.; CESAREO, R.; MASCARENHAS, S.; REICHARDT, K. Calibração e uso de um tomógrafo computadorizado em ciência do solo. Revista Brasileira de Ciencia do Solo, Campinas, v.16, n.2, p.161-167, maio/ago. 1992.Biblioteca(s): Embrapa Instrumentação. |
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59. | | CRESTANA, S.; REICHARDT, K.; VAZ, C. M. P.; MASCARENHAS, S.; CRUVINEL, P. E.; STOLF, R. Diagnose da compactação do solo ocasionada por implementos agrícolas em cultura de cana-de-açúcar usando a tomografia computadorizada de raios gama. In: REUNIÃO ANUAL DA SBPC, 40., 1988, São Paulo, SP. Ciência e Cultura, São Paulo, v.40, n.7, p.15, jul. 1988. Suplemento. Resumos. ref.34-A.1.Biblioteca(s): Embrapa Instrumentação. |
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