Zobrazeno 1 - 10
of 33
pro vyhledávání: '"C.A. Hazin"'
Autor:
Bernardo Maranhão Dantas, C.A. Hazin, C.B. Carvalho, R.M.G. Gontijo, Ana Letícia Almeida Dantas, F. F. Lima, E. A. Lucena
Publikováno v:
Applied Radiation and Isotopes. 113:1-4
Intakes of radionuclides can be estimated through in vivo measurements, and the uncertainties associated to the measured activities should be clearly stated in monitoring program reports. This study aims to evaluate the uncertainties of in vivo monit
Publikováno v:
Radiation Physics and Chemistry. 95:329-332
The worldwide concern about trace metal pollution has been increasing in recent years due to the increase in anthropogenic trace metal inputs to the various ecosystems. The quantification of the chemical species of metals in sediments is essential fo
Autor:
M.H.P. Gazineu, C.A. Hazin
Publikováno v:
Applied Radiation and Isotopes. 66:90-94
Activity concentrations of (226)Ra, (228)Ra and (40)K in scales and sludge generated during oil extraction and production operations were determined using an HPGe gamma spectrometric system. Concentrations ranged from 42.7 to 2110.0 kBqkg(-1) for (22
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 580:690-693
The Lagoa Olho D′Agua (Pernambuco, Brazil), is a 3.75 km 2 lagoon which receives freshwater from both the Atlantic Ocean and Jaboatao River. The lagoon is under severe degradation process caused by pollutants released from industrial facilities and
Publikováno v:
Radiation Protection Dosimetry. 84:345-348
An instrument with digital readout was designed and constructed to provide rapid, simple and non-invasive measurement of X ray dental equipment parameters. The instrument is capable of measuring the entrance dose, exposure time, tube kV p , and filtr
Publikováno v:
Radiation Protection Dosimetry. 47:387-390
Publikováno v:
Radiation Protection Dosimetry. 84:341-343
The results are reported of an investigation carried out to determine the suitability of using a low cost commercially available silicon photodiode as a high energy electron dosemeter. Measurements of the photodiode dose response were performed in a
Publikováno v:
Radiation Protection Dosimetry. 66:451-453
The angular response of the BPW-34 photodiode (Siemens) irradiated with 90 Sr/ 90 Y beta radiation was evaluated in terms of H'(0.07;Ω). The detector was positioned at distances of 0.11 m, 0.30 m, and 0.50 m from the source, and the angle between th
Publikováno v:
Radiation Protection Dosimetry. 66:259-261
In recent years, semiconductor detectors have found application in radiation dosimetry due to their high sensitivity and small dimensions. In previous papers the response of the common photodiode BPW-34 has been studied to evaluate its stability for
Publikováno v:
Waste Management. 9:27-36
Concrete represents the primary barrier to migration in many proposed low-level waste storage facilities. While it may retard some dissolved ions to varying extent, it is not clear to what extent tritium movement through concrete would take place ove