Cross-section measurements for neutron-induced reactions in copper at neutron energies of 70.7 and 110.8MeV

Cross section measurements at neutron energies 71 and 112MeV and energy integrated cross section measurements (0.1<En<750MeV) for the neutron induced reactions O(n,x)10Be, Si(n,x)10Be, and Si(n,x)26Al

“…This procedure effectively minimizes the effect of the neutrons having less than the peak energy, i.e., the tail. The detailed experimental procedures are described in [9].…”

“…The detailed irradiation settings were described earlier [9,14]. The target stacks consist of one or two targets with 15 mm diameter Al, Au, Ni and Cu monitor foils.…”

“…After irradiation, short-lived nuclides in the targets and monitor foils were measured by non-destructive gamma-ray spectroscopy using high purity Ge detectors; the cross sections measured for several radionuclides produced in the different monitor foils serve as secondary checks of the measured neutron fluences [9,14]. The c-ray measurements in the first few days after irradiations were performed at both iTL and LANSCE, while measurements continued for several months at either the Harvard Cyclotron Laboratory or the Francis H. Burr Proton Therapy Facility, Massachusetts General Hospital.…”

“…There are several strategies that are used to derive these estimates: (1) use the cross section for the corresponding proton-induced reaction; (2) use cross sections derived from nuclear physics models and calculations; (3) estimate the cross section for neutron-induced reactions from thick target simulation experiments [3] or from experimental results of lunar cores and meteorites exposed to cosmic rays [4]. None of these strategies is ideal in all cases as has been shown previously for short-lived radionuclides produced from Cu, Ti, Fe and Ni (e.g., [9,10]). …”

A new irradiation facility for neutron-induced Single Event Effect studies at LNL

“…The mono-energetic neutron facility is designed so that neutrons with the wrong energy can be properly accounted for: the SEE rates due the forward mono-energetic neutrons can be unfolded by subtracting SEE rates measured in control devices exposed only to off-axis (15-30°) neutrons [12], [13]. …”