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Title: Neutron-deuteron analyzing power data at 19.0 MeV

Abstract

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.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]
  1. Department of Physics, Duke University, Durham, North Carolina 27708 (United States) and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708 (United States)
Publication Date:
OSTI Identifier:
21388865
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.81.024003; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

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, and Institute of Physics, Jagellonian University, Cracow. Neutron-deuteron analyzing power data at 19.0 MeV. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.81.024003.
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, & Institute of Physics, Jagellonian University, Cracow. Neutron-deuteron analyzing power data at 19.0 MeV. United States. doi:10.1103/PHYSREVC.81.024003.
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, and Institute of Physics, Jagellonian University, Cracow. Mon . "Neutron-deuteron analyzing power data at 19.0 MeV". United States. doi:10.1103/PHYSREVC.81.024003.
@article{osti_21388865,
title = {Neutron-deuteron analyzing power data at 19.0 MeV},
author = {Weisel, G J and Tornow, W and Crowe, III, B J and Crowell, A S and Esterline, J H and Howell, C R and Kelley, J H and Macri, R A and Pedroni, R S and Walter, R L and Witala, H and Institute of Physics, Jagellonian University, Cracow},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.81.024003},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 81,
place = {United States},
year = {2010},
month = {2}
}