Author/Authors :
Granier، نويسنده , , T. and Pangault، نويسنده , , L. and Ethvignot، نويسنده , , T. and Haight، نويسنده , , R.C. and Ledoux، نويسنده , , X. and Méot، نويسنده , , V. and Patin، نويسنده , , Y. and Pras، نويسنده , , P. and Szmigiel، نويسنده , , M. and Rundberg، نويسنده , , R.S. and Wilhelmy، نويسنده , , J.B.، نويسنده ,
Abstract :
The “lead-slowing-down-spectrometer” method is an established technique for measuring neutron-induced reaction cross-sections. It is known to provide high neutron fluences below 100 keV. In this work, the possibility of applying this method to the measurement of the neutron-induced fission cross-section of shortlived actinides and in particular of the 77 eV isomer of 235U is investigated. Numerical simulations and a test-experiment using a photovaltaic cell fission detector demonstrate the feasibility of such a measurement at the Los Alamos Neutron Science Center using 800 MeV proton-induced spallation to provide source neutrons.
Keywords :
Nuclear fission , Neutron spectrometry , uranium , isomers , Nuclear Data
