JAERI facilities

Full text: In JAEA, a 14 MeV neutron generator FNS and a TIARA AVF cyclotron are used for the IFMIF related nuclear data measurements. Double-differential charged-particle emission cross section (DDXc) for several light elements have been measured by using a pencil-beam DT neutron source of FNS, where a newly developed a counter-telescope system with very thin silicon surface barrier detectors of appropriate thicknesses has been employed. The detailed DDXc data in a wide emission energy range were obtained for 27Al, 9Be, natC and 19F. For 27Al(n,xα) reactions, the measured total cross section agreed well with the evaluated data. For 9Be(n,xα) reactions, there were differences in the α-particle emission DDX between measurement and the evaluated data in the detail of energy structure. For 19F(n, charged particle) reactions, some peaks corresponding to excited states of the residual nuclei were observed in the energy spectrum of emitted proton, deuteron, and triton particles. Activation cross sections for deuteron-induced reactions in aluminum, iron, copper, tantalum and tungsten were measured by using the stacked-foil method. The stacked-foils were irradiated with a deuteron beam at the TIARA AVF cyclotron. We obtained the activation cross sections for 27Al(d,x)22,24Na, natFe(d,x)55,56Co, natCu(d,x)61Cu, natCu(d,x)62Zn, natTa(d,x)178,180Ta and natW(d,x)181,183Re in 20-40MeV region. These cross sections were compared with other experimental ones and the data in the ACSELAM library calculated by the ALICE-F code. Also Li(p,n) quasi-monochromatic neutron source is available for the IFMIF neutron cross section measurements. (author)