出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Accelerator driven system will use a heavy element target such as lead. Many calculations are
available to simulate high-energy spallation neutron induced reactions, but little data are
available for comparison with the simulations.
In order to constrain the simulation tools we have measured (n,Xn) double differential cross
section on different targets at The Svedberg Laboratory, Uppsala, Sweden. For neutron energy
above 40 MeV, we have developed a novel detector, CLODIA, based on proton recoil and drift
chambers to determine neutron energy. CLODIA (Chamber for LOcalization with DrIft and
Amplification) is able to track recoil protons with energy up to 90 MeV with spatial resolution
of about one millimeter and a detection efficiency of 99% for each drift chamber. Using
CLODIA coupled wit*h the SCANDAL set-up, we have been able to measure double
differential (n,Xn) cross section on lead and iron for incident neutron energy in the 40-95 MeV
energy region.
