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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Medidas de seções de choque de reações induzidas por nêutrons rápidos

Suita, Julio Cezar, Instituto de Engenharia Nuclear 01 1900 (has links)
Submitted by Marcele Costal de Castro (costalcastro@gmail.com) on 2017-09-27T17:33:25Z No. of bitstreams: 1 JULIO CESAR SUITA D.pdf: 3971978 bytes, checksum: 60e4fc95f134a5c7fee28b0a90ec6b74 (MD5) / Made available in DSpace on 2017-09-27T17:33:25Z (GMT). No. of bitstreams: 1 JULIO CESAR SUITA D.pdf: 3971978 bytes, checksum: 60e4fc95f134a5c7fee28b0a90ec6b74 (MD5) Previous issue date: 1994-01 / Foram feitas medidas de seções de choque das reações 58Ni(n,p) 58Co, 59Co(n,p) 59Fe, 51 V(n,α) 49Sc e 59Co(n,2n) 59Co, e de razões isoméricas do 59Co na faixa de energia de nêutrons entre 9 e 14 MeV. São apresentados os arranjos experimentais desenvolvidos para a realização dessas medidas e o processo de obtenção e análise dos dados. Os resultados obtidos são comparados com medidas anteriores e com a curva teórica calculada com o auxilio do código GNASH, apontado como o mais adequado para a região de energia e massa estudadas. Em geral os resultados experimentais são mais baixos que os calculados. / Cross sections for the 58Ni(n,p) 58Co, 59Co(n,p) 59Fe, 51 V(n,α) 48Sc e 59Co(n,2n) 58Co reactions, and isomeric ratio in 58Co were measured in the neutron energy range from 9 to 14 MeV. The experimental arrangements set up for these measurements are presented together with the data aquisition and analysis procedures. The results are compared with earlier measurements as well as the theoretical calculations performed by the GNASH code, which is known as the most suitable for this energy and mass regions. In general, the experimental results are lower than the theoretical ones.

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