Neutron Scattering Cross Section Measurements for ^169TM via the Time-of-Flight Technique
Abstract
This research entails the first direct neutron scattering cross section measurements for ^169Tm via the time-of-flight technique. Neutron elastic and inelastic cross-section angular distributions were measured at 590-keV and 1000-keV incident neutron energies. Differential cross-section excitation functions were also measured in 0.1-MeV steps at 125^o (scattering angle) from 495-keV to 1000-keV incident energy. The elastic measurements in the 0.5-MeV to 1.0-MeV incident neutron energy range compare favorably with the JENDL-4.0 evaluation based on nuclear reaction model calculations in the Japanese Evaluated Nuclear Data Library. The inelastic measurements are compared to JENDL-4.0 and to earlier measurements by Ko et al. (Nucl. Phys. A679, 147-162 (2000)) who used the (n, n' γ) technique for states above 100 keV in excitation. The measurements were made using the UMass Lowell 5.5-MV Van de Graaff accelerator, operated in the pulsed and bunched beam mode, producing subnanosecond proton pulses at a 5-MHz repetition rate to generate neutrons via the ^7Li(p,n)^7Be reaction in a thin metallic elemental lithium target.
- Publication:
-
APS New England Section Spring Meeting Abstracts
- Pub Date:
- April 2011
- Bibcode:
- 2011APS..NES.C1010A