High resolution inelastic scattering cross section of (23) Na and (27) Al
The inelastic cross sections of selected light elements have been measured in high resolution time of flight experiments at the Geel pulsed electron linear accelerator. The accelerator was run at optimum conditions of 1 ns pulse width, 800 Hz repetition rate and a mean electron beam current of 50 æA for several weeks. The source of white neutrons emerging from a rotary U target was used for the measurements at a neutron flight path of 58.5 m and the neutron flux was constantly monitored at 27.5 m with a (235) U fission chamber. Neutrons and gamma-rays emitted in inelastic neutron scattering were detected by a system of eight NE213 liquid scintillators and sorted by pulse shape discrimination. Detector responses were calculated by Monte Carlo techniques. For (23) Na the inelastic scattering was measured for the first level at 440 keV. Data up to 2 MeV were analysed with the R-matrix code SAMMY to extract resonance parameters. For (27) Al the inelastic scattering from the first two levels, at 843 keV and 1015 keV, could be separated. The analysis above the inelastic threshold up to approximately 2 MeV, again using SAMMY, combined this inelastic data with total cross section data measured at Geel. Cross section data and resonance parameters for these two isotopes are presented.
Bibliographic Reference: Paper presented: International Conference on Nuclear Data for Science and Technology, Trieste (IT) May 19-24, 1997
Availability: Available from (1) as Paper EN 40325 ORA
Record Number: 199711235 / Last updated on: 1997-10-10
Original language: en
Available languages: en