Cd and nat Cd target / Proton and deuteron induced reactions / Cross section / 114m In therapeutic radionuclideSummary. For production of the therapeutic radionuclide 114m In, proton and deuteron induced nuclear reactions were investigated using the stacked-foil technique on enriched 114 Cd and nat Cd targets up to E p = 36 MeV and E d = 21 MeV.
Cross sections were determined by the activation technique for the reactions 64 Zn(p,γ) 65 Ga, 66 Zn(p,γ) 67 Ga, and 67 Zn(p,γ) 68 Ga in the center of mass energy range between 1 and 3 MeV using the proton beam of the Van de Graaff accelerator at KIPT, Kharkiv. Thin enriched targets of zinc isotopes on thick tantalum backings were used in the experiment. The radioactivities of 65 Ga, 67 Ga, and 68 Ga were measured by high-resolution γ-ray spectrometry. S-factors and reaction rates were derived from the experimental cross sections and compared with the statistical theory predictions using the new computer code NON-SMOKER WEB. Despite the largely different magnitudes of the cross sections of the first two reactions, theory reproduces the experimental values equally well. Best agreement of the predictions with the experimental data was achieved with a modification of the optical model potential and variation of radiative widths The sensitivity of the results on different theory parameters is studied. This is an important test of the model for proton capture at energies relevant in p-process nucleosynthesis.
Using the activation technique (p,n)-reaction cross sections of the tin isotopes with A=115, 116 and 120, the first of which is a p-process isotope, have been measured in the proton energy range between 4.5 and 9.0 MeV, corresponding to stellar temperatures T 9 > 3. Thin selfsupporting foils of enriched tin isotopes were irradiated at the Kharkiv linear accelerator with proton beam intensities of (100…150) nA. The induced activities were measured with a calibrated Ge(Li)-detector. The cross sections for the production of isomeric states in 116 Sb (J m =8-, J g =3 +) and 120 Sb (J m =8-, J g =1 +) were determined separately. The total cross sections of the 120 Sn(p,n) 120 Sb reaction are compared with the results of other authors obtained with the neutron counting technique in this incident proton energy range. The cross sections, astrophysical S-factors, and reaction rates derived from the experiment are compared with Hauser-Feshbach statistical theory predictions. In general, good agreement is found.
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