Characterization and measurement of gamma radiation shielding of a new tungsten-lignin composite
| Autor: | Armando Cirilo de Souza, Hedielly Brasil Fernandes, Jesualdo Luiz Rossi, Adailto Miyai, Flavio Aristone, Adriana de Fátima Gomes Gouvêa |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Composite number chemistry.chemical_element 02 engineering and technology Radiation Tungsten 021001 nanoscience & nanotechnology 01 natural sciences Characterization (materials science) chemistry.chemical_compound Radiation shielding chemistry Mechanics of Materials 0103 physical sciences Electromagnetic shielding Materials Chemistry Ceramics and Composites Lignin Shielding effect Composite material 0210 nano-technology |
| Zdroj: | Journal of Composite Materials. 55:3579-3588 |
| ISSN: | 1530-793X 0021-9983 |
| Popis: | This research has been carried on to analyze the capability of a new composite to be effectively used as shielding of gamma radiation. The preparation of a metal-organic composite formed by tungsten and Kraft lignin is presented. Samples have been characterized through X-rays and scanning electron microscopy measurements. The results led to the study of the different phase formations. The microscopic analyzes indicate that two different phases are present in the composite. The absence of oxidation in the process even after the temperature treatment imposed to form the sample has also been noticed. Measurements of the attenuation have been performed to study its ability to absorb gamma radiation. A sample of cobalt 60 (Co-60), for which the peak energies are at 1173 keV and 1332 keV, was used as a source of gamma radiation in the experiment of attenuation. The measured attenuation of gamma radiations when the composite is placed to act as a shield is only 16% smaller than the attenuation obtained for standard pure tungsten. This is a clear indication that the new metal-organic composite is suitable for the fabrication of devices dedicated to shielding radiation, with the advantage of being easier to manipulate. |
| Databáze: | OpenAIRE |
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