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https://hdl.handle.net/1822/37232
Título: | Natural gamma radioactivity in granites with different weathering degrees: A case study in Braga (NW Portugal) |
Autor(es): | Lima, M. Alves, C. Sanjurjo-Sánchez, J. |
Data: | 1-Dez-2014 |
Editora: | CRC Press |
Resumo(s): | Granite is one of the most radioactive rocks due mainly to their content in K, U e Th. In order to assess radiation risks in historical buildings, a gamma radiation assessment has been made in quarry samples of the Braga granite with different weathering degree. Using gamma spectrometry, the specific activities of U and Th, decay chains and radioactive K, were measured. The specific activities of radionuclides were used to calculate the gamma building index (I < inf > ? < /inf > ) of the EU technical guidance (RP112) for regulatory control of building materials, and to estimate some radiological hazardous parameters such as: the average radium equivalent activity (Ra < inf > eq < /inf > ), Annual Gonadal Equivalent Dose (AGED), the absorbed dose and the annual effective doses. All the samples exceed the I < inf > ? < /inf > value of 1 and the indoor air annual effective dose rate in excess due to buildings materials can be higher than 1 mSv y < sup > -1 < /sup > in the more weathering samples. |
Tipo: | Capítulo de livro |
URI: | https://hdl.handle.net/1822/37232 |
ISBN: | 9781138027442 |
DOI: | 10.1201/b17802 |
Versão da editora: | The final version is available in the CRC book: https://www.crcpress.com/Science-Technology-and-Cultural-Heritage/RogerioCandelera/9781138027442 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CIG-R - Livros de Actas |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Sevilha_RepositoriUM.pdf Acesso restrito! | 78,11 kB | Adobe PDF | Ver/Abrir |