Revisiting Elastic Scattering of D(n, n)D reaction

• Main Authors: Stanoiu, M., Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH Str. Atomistilor no.407, P.O.BOX MG-6, Bucharest-Magurele, Canton, L., Kozier, K. S., Rao, R., Roubtsov, D., Nankov, N., Plompen, A., Rouki, C., Svenne, J. P.
• Format: Conference Proceeding
• Language: English
• Subjects: ANGULAR DISTRIBUTION; BACKSCATTERING; BARYON REACTIONS; BARYONS; BINDING ENERGY; BORON 10; BORON ISOTOPES; CHARGED PARTICLES; CROSS SECTIONS; DATA PROCESSING; DEUTERIUM; DEUTERIUM TARGET; DEUTERONS; DIFFERENTIAL CROSS SECTIONS; DISTRIBUTION; ELASTIC SCATTERING; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; FERMIONS; GE SEMICONDUCTOR DETECTORS; HADRON REACTIONS; HADRONS; HIGH-PURITY GE DETECTORS; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; MANY-BODY PROBLEM; MEASURING INSTRUMENTS; MEV RANGE; NEUTRON REACTIONS; NEUTRONS; NUCLEAR DATA COLLECTIONS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; NUCLEAR THEORY; NUCLEI; NUCLEON REACTIONS; NUCLEONS; ODD-ODD NUCLEI; PROCESSING; RADIATION DETECTORS; SCATTERING; SEMICONDUCTOR DETECTORS; STABLE ISOTOPES; TARGETS; THREE-BODY PROBLEM; TIME-OF-FLIGHT METHOD
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.3431420

Interest has risen recently concerning the angular distribution of neutron elastic scattering on deuterium at low incident energies. The main subject is the amount of backscattering at energies below 3.2 MeV observed in differential cross-section measurements and represented in various evaluations. These various angles of approach encompass fundamental nuclear-data measurements, three-body nuclear-theory calculations, evaluated nuclear -data libraries and associated data processing, and the simulation of critical experiments involving heav y water. A new theoretical approach on the basis of three -nucleon theory was made that resulted in new angular distributions. At the GELINA neutron time-of-flight facility a new experimental setup was developed to measure elastic scattering of neutrons on deuterium in the energy range of interest. The technique proposed is complementary to the earlier works by detecting the scattered neutron instead of the recoiling deuterium. The setup is an array of two HPGe detectors, each with a {sup 10}B neutron-gamma converter. Preliminary GELINA findings using a C6D6 target indicate less backscatter than predicted by ENDF/B -VII.0, in contrast to the nuclear-theory results. It is expected that completion of the planned work will reduce the uncertainty of the energy-angle distributions for deuterium elastic scattering and contribute to an improved deuterium evaluation in a future release of ENDF/B -VII.