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In the 5.5 MV tandem T11/25 Accelerator Laboratory of NCSR “Demokritos” monoenergetic neutron beams have been used in the energy range 7–11.5 MeV, produced via the 2H(d,n) reaction. The flux variation of the neutron beam is monitored by using a BF3 detector, while an investigation of the energy dependence of the neutron fluence is carried out via the multiple foil activation technique. The 232Th(n,2n)231Th and 241Am(n,2n)240Am as well as (n,2n), (n,p) and (n,α) reactions on natural Ge and Hf isotopes, have been investigated from threshold up to 11.5 MeV, by using the activation method. The cross section values have been determined relative to the 197Au(n,2n)196Au, 27Al(n,α)24Na and 93Nb(n,2n) reference reaction cross sections. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Cross section measurements of neutron induced reactions on isotopes of natural Ge and Hf have been carried out at the 5.5 MV Tandem accelerator of the NCSR “Demokritos” in Athens, Greece, using the activation technique. The measurements have been performed at neutron incident energies 8.8, 9.6, 10.6, 11.1, 11.4 MeV for the case of Ge and at 8.8, 9.6, 11.1, 11.4 MeV for the Hf one. In all cases the target material was Ge and HfO2 powder of high purity. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]