As investigações sobre radioatividade ambiental realizadas em Guarapari pelo padre jesuíta Francisco Xavier Roser (1956–1967)

The article describes the reports of expeditions to Guarapari and other publications (1956–1967) written by Father Francisco Xavier Roser S.J. with the aim of characterizing his scientific production on environmental radiation We try to elucidate his scientific network. Our contribution also discusses the radiometric surveys of areas with high soil radioactivity, the dosimetric exams of the local population, and the measurements of atmospheric radioactivity carried out on the south coast of Espírito Santo. Finally, we explain the techniques, the research methods employed by the group of scientists, gathered around Roser, the research results and the inter-institutional collaborations.