Neutron-deuteron analyzing power data at 19.0 MeV

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024003· OSTI ID:21388865

Weisel, G J; Tornow, W; Crowe, III, B J; Crowell, A S; Esterline, J H; Howell, C R; Kelley, J H; Macri, R A; Pedroni, R S; Walter, R L; Witala, H ^[1]

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1. Department of Physics, Duke University, Durham, North Carolina 27708 (United States) and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708 (United States)

Measurements of neutron-deuteron (n-d) analyzing power A{sub y}(theta) at E{sub n}=19.0 MeV are reported at 16 angles from theta{sub c.m.}=46.7 to 152.0 deg. The objective of the experiment is to better characterize the discrepancies between n-d data and the predictions of three-nucleon calculations for neutron energies above 16.0 MeV. The experiment used a shielded neutron source, which produced polarized neutrons via the {sup 2}H(d-vector,n-vector){sup 3}He reaction, a deuterated liquid scintillator center detector (CD) and liquid-scintillator neutron side detectors. A coincidence between the CD and the side detectors isolated the elastic-scattering events. The CD pulse height spectrum associated with each side detector was sorted by using pulse-shape discrimination, time-of-flight techniques, and by removing accidental coincidences. A Monte Carlo computer simulation of the experiment accounted for effects due to finite geometry, multiple scattering, and CD edge effects. The resulting high-precision data (with absolute uncertainties ranging from 0.0022 to 0.0132) have a somewhat lower discrepancy with the predictions of three-body calculations, as compared to those found at lower energies.

• OSTI ID: 21388865
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevC.81.024003; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
COMPUTERIZED SIMULATION
DEUTERIUM
DEUTERONS
ELASTIC SCATTERING
FORECASTING
HELIUM 3
LIQUIDS
MEV RANGE 10-100
MONTE CARLO METHOD
MULTIPLE SCATTERING
NEUTRON SOURCES
NEUTRON-NEUTRON INTERACTIONS
NEUTRONS
NUCLEAR REACTIONS
POLARIZATION-ASYMMETRY RATIO
PROTON-NEUTRON INTERACTIONS
PULSE SHAPERS
PULSES
SPECTRA
THREE-BODY PROBLEM
TIME-OF-FLIGHT METHOD
BARYON-BARYON INTERACTIONS
BARYONS
CALCULATION METHODS
CHARGED PARTICLES
DIMENSIONLESS NUMBERS
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-ODD NUCLEI
FERMIONS
FLUIDS
HADRON-HADRON INTERACTIONS
HADRONS
HELIUM ISOTOPES
HYDROGEN ISOTOPES
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MANY-BODY PROBLEM
MEV RANGE
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
ODD-ODD NUCLEI
PARTICLE INTERACTIONS
PARTICLE SOURCES
PROTON-NUCLEON INTERACTIONS
PULSE CIRCUITS
RADIATION SOURCES
SCATTERING
SIGNAL CONDITIONERS
SIMULATION
STABLE ISOTOPES