Neutron-deuteron analyzing power data at 19.0 MeV
Abstract
Measurements of neutron-deuteron (n-d) analyzing power Ay(θ) at En=19.0 MeV are reported
at 16 angles from θc.m.=46.7 to 152.0°. 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 H2(d-,n-)He3 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. © 2010 The American Physical Society.
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https://hdl.handle.net/10161/4259Published Version (Please cite this version)
10.1103/PhysRevC.81.024003Publication Info
Weisel, GJ; Tornow, W; Crowe, BJ; Crowell, AS; Esterline, JH; Howell, CR; ... Witała,
H (2010). Neutron-deuteron analyzing power data at 19.0 MeV. Physical Review C - Nuclear Physics, 81(2). pp. 24003. 10.1103/PhysRevC.81.024003. Retrieved from https://hdl.handle.net/10161/4259.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Alexander Crowell
Research Scientist, Senior
Calvin R. Howell
Professor of Physics
Professor Howell’s research is in the area of experimental nuclear physics with emphasis
on the quantum chromodynamics (QCD) description of low-energy nuclear phenomena, including
structure properties of nucleons and nuclei and reaction dynamics in few-nucleon systems.
The macroscopic properties of nucleon structure and the residual strong nuclear force
between neutrons and protons in nuclei emerge from QCD at distances where the color
interactions between quarks a
Werner Tornow
Professor Emeritus of Physics
Professor Werner Tornow became the Director of TUNL in July, 1996. He is primarily
interested in studying few-nucleon systems with special emphasis on two-nucleon systems
and three-nucleon force effects in three-nucleon systems. Polarized beams and polarized
targets are essential in this work. He collaborates with the leading theoreticians
in his field to interpret the experimental data obtained at TUNL. He recently became
involved in weak-interaction physics, especially in double-beta decay s
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