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AbstractAbstract
[en] A study of the production of a 44 Ti target was carried out aiming the determination of its thermal neutron capture cross-section. With this purpose, the cross-section of the reaction 45 Sc(p,2 n) 44 Ti was determined in the energies 16-, 18-, 20-22- and 45 MeV. The cross-section of the reactions (p,n) 45 Ti, (p,pn) 44m Sc, (p,pn) 44g Sc and (p,p2n)43 Sc were also measured. The results in the low energy region are in good agreement with a previous work by McGee et al. On the other hand, the cross-section at 45 MeV is different from McGee's result and indicates the existence of an abnormal behavior of the excitation function at higher energies. Furthermore, a radiochemical separation method was developed in order to eliminate Sc from the 44 Ti target which was irradiated with neutrons. It was possible to determine an upper limit for the cross-section of the reaction 44 Ti (n, γ) of 4 x 103 b. At last, it is presented a discussion of the results obtained and their possible astrophysical implications. (author)
Original Title
Producao de um alvo de 44 Ti e sua secao de choque para captura de neutrons termicos
Primary Subject
Source
1993; 82 p; 94 refs.; Tese (M.Sc.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Report Number
Country of publication
BARYON REACTIONS, BARYON-BARYON INTERACTIONS, BARYONS, BETA DECAY RADIOISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, ELEMENTS, EVEN-EVEN NUCLEI, FERMIONS, HADRON REACTIONS, HADRON-HADRON INTERACTIONS, HADRONS, INTERACTIONS, INTERMEDIATE MASS NUCLEI, ISOTOPES, METALS, NEUTRONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEON-NUCLEON INTERACTIONS, NUCLEONS, PARTICLE INTERACTIONS, PROTON-NUCLEON INTERACTIONS, RADIOISOTOPES, TARGETS, TITANIUM ISOTOPES, TRANSITION ELEMENTS, YEARS LIVING RADIOISOTOPES
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