Abstract
The CBNM Van de Graaff will be equipped with a post buncher to reduce the pulse width from 1.5 ns down to about 250 ps. Therefore the 9Be(d,n)10B thick-target yield obtained by a pulsed 7 MeV deuteron beam was studied, especially in view of using this source for neutron cross section measurements in the energy range up to 11.3 MeV. For this purpose the spectrum shape was measured in this neutron energy range and the integral was normalized to values from literature. An absolute neutron fluence comparison was made between this source and the GELINA spectrum normalized to the same inverse velocity resolution of 0.1 ns.m−1. In order to show the great potential of this source, the total cross sections of carbon and silicon were determined in an energy range from a few 100 keV to 11 MeV in a measuring time of a few hours with a statistical accuracy, e.g. at 6 MeV, better than 2%, and with an energy resolution of 60 keV. Comparison of the experimental results was made with the evaluated data sets of ENDF/B-V.
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