Neutron activation cross sections at 14.4 MeV for Kr and Xe isotopes

124Xe(n,γ)125Xe and124Xe(n,2n)123Xe measurements for National Ignition Facility

“…Mono-energetic neutrons were obtained via the 3 H(p,n) 3 He reaction (Q=-0.764 MeV) between 0.37 and 3.8 MeV, via the 2 H(d,n) 3 He reaction (Q = +3.269 MeV) between 4.5 and 14.5 MeV, and finally at 14.8 MeV via the 3 H(d,n) 4 He reaction (Q=+17.589 MeV). The chargedparticle beams were accelerated by the tandem accelerator of the Triangle Universities of Nuclear Laboratory (TUNL).…”

“…For the (n,J) measurements the 3 H(p,n) 3 He reaction was used to produce neutron beams at 0.37, 0.86, 1.86 MeV, while the 2 H(d,n) 3 He was employed at 4.48, 5.31, 6.31 and 7.25 MeV. Indium or gold monitor foils were attached to the upstream and downstream side of the sphere for neutron fluence determination.…”

“…The neutron flux was monitored with a BC-501A liquid scintillator positioned at 0 R relative to the incident charged-particle beam at a distance of 2.9 m from the neutron source. The tritiated titanium target used in connection with the 3 H(p,n) 3 He reaction consists of 2.1 Ci of 3 H loaded into a 2.2 mg/cm 2 thick layer of titanium of 16 mm diameter, which in turn is evaporated onto a 0.4 mm thick copper backing. The tritiated target described above was also used for the 3 H(d,n) 4 He reaction to produce 14.8 MeV neutrons.…”

“…Furthermore, for the (n,2n) reaction experimental data do not exist, except for three conflicting measurements at 14.5 MeV [2][3][4].…”

“…The chargedparticle beams were accelerated by the tandem accelerator of the Triangle Universities of Nuclear Laboratory (TUNL). Typically proton and deuteron beam currents on target were between 1.5 PA and 3.5 PA. Fig.1 shows a schematic view of the experimental setup for the 124 Xe(n,J) 125 Xe measurement using the 2 H(d,n) 3 He reaction. It consists of a 3 cm long cell pressurized to 3 atm of high-purity deuterium gas.…”