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Based on part of the M.S. Thesis presented by O.A.P. Tavares at tho Centro Brasiloiro de Pesquisas Fisicas, Rio de Janeiro, November 1973. This work has been supported in part by the Brazilian Conselho Nacional de Desenvolvimento Científico o Tecnológico and Commissão Nacional de Energia Nuclear and by the Italian Consiglio Nazionale delle Ricerche.
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de Carvalho, H.G., Martins, J.B., Tavares, O.A.P. et al. Photofission cross-sections of209Bi,232Th and238U above 1 GeV. Lett. Nuovo Cimento 14, 615–621 (1975). https://doi.org/10.1007/BF02743343
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DOI: https://doi.org/10.1007/BF02743343