Fission fragment angular distribution measurements of U-235 and U-238 at CERN n_TOF facility

Neutron-induced fission cross sections of U-238 and U-235 are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection efficiency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process. In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n_TOF facility. In this work, we present the preliminary results on the analysis of new U-235(n,f) and U-238(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data.Postprint (published version

Manejo da água em pomares de pessegueiro.

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Tinea Corporis Causada por Trichophyton Benhamiae de Transmissão Canina: Primeiro Relato em Portugal

Dermatophytoses are superficial and contagious infections caused by dermatophyte fungi. They are the most fre-quent infectious dermatosis in clinical practice, and can affect the skin, hair and nails. Its correct diagnosis allows the understanding of clinical, ecological and epidemiological aspects associated with these microorganisms. Clinical presentation is variable and depends on the habitat (human, animal or soil origin), virulence of the fungus and on the host’s immune status.We report the clinical case of a 62-year-old man with tinea corporis, which stands out for its exuberant clinical pres-entation and by the isolated agent, Trichophyton benhamiae (formerly known as Arthroderma benhamiae), an etiologi-cal agent of dermatophytosis that has not been scientifically reported in Portugal yet.info:eu-repo/semantics/publishedVersio

Utilização do resíduo de pupunha na produção de celuloses por cultura mista em fermentação em estado sólido.

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