Measurement of activation cross-sections of (n, np+d) reactions producing short-lived nuclei in the energy range between 13.4 and 14.9 MeV using an intense neutron source OKTAVIAN

Abstract

Activation cross-sections for 17 (n, np+d) reactions producing short-lived nuclei with half-lives between 42 s and 23 min, were measured in the energy range between 13.4 and 14.9 MeV by an activation method. The measured target isotopes were 26Mg, 29, 30Si, 53, 54Cr, 67Zn, 87Sr, 98, 100Mo, 102Ru, 105, 106, 108Pd, 123Te, 163Dy, 179Hf and 189Os. Eleven cross-sections for 26Mg, 30Si, 87Sr, 100Mo, 102Ru, 105, 106Pd, 123Te, 163Dy, 179Hf and 189Os were obtained for the first time, and four cross-sections for 53, 54Cr, 67Zn and 108Pd were obtained at six-point energies for the first time. An intense 14 MeV neutron source, OKTAVIAN at Osaka University was used for irradiation. All cross-section values were relatively obtained on the basis of the standard cross-section of 27Al(n, α) 24Na reaction (ENDF/B-VI). To obtain reliable neutron activation cross-sections, careful attention was paid to neutron irradiation and induced activity measurement. The present results were compared with the evaluated data in JENDL-3.2, JENDL-Activation File and ENDF/B-VI. The cross-sections are underestimated for 102Ru and 108Pd in JENDL-3.2.