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Neutron-deuteron analyzing power data at En=22.5 MeV

Publication ,  Conference
Weisel, GJ; Tornow, W; Crowell, AS; Esterline, JH; Hale, GM; Howell, CR; O'Malley, PD; Tompkins, JR; Witała, H
Published in: Physical Review C - Nuclear Physics
May 12, 2014

We present measurements of n-d analyzing power, Ay(θ), at En=22.5 MeV. The experiment uses a shielded neutron source which produced polarized neutrons via the 2H(d - ,n - )3He reaction. It also uses a deuterated liquid-scintillator center detector and six pairs of liquid-scintillator neutron side detectors. Elastic neutron scattering events are identified by using time-of-flight techniques and by setting a window in the center detector pulse-height spectrum. The beam polarization is monitored by using a high-pressure helium gas cell and an additional pair of liquid-scintillator side detectors. The n-d Ay(θ) data were corrected for finite-geometry and multiple-scattering effects using a Monte Carlo simulation of the experiment. The 22.5-MeV data demonstrate that the three-nucleon analyzing power puzzle also exists at this energy. They show a significant discrepancy with predictions of high-precision nucleon-nucleon potentials alone or combined with Tucscon-Melbourne or Urbana IX three-nucleon forces, as well as currently available effective-field theory based potentials of next-to-next-to-next-to- leading order. © 2014 American Physical Society.

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Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

May 12, 2014

Volume

89

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Weisel, G. J., Tornow, W., Crowell, A. S., Esterline, J. H., Hale, G. M., Howell, C. R., … Witała, H. (2014). Neutron-deuteron analyzing power data at En=22.5 MeV. In Physical Review C - Nuclear Physics (Vol. 89). https://doi.org/10.1103/PhysRevC.89.054001
Weisel, G. J., W. Tornow, A. S. Crowell, J. H. Esterline, G. M. Hale, C. R. Howell, P. D. O’Malley, J. R. Tompkins, and H. Witała. “Neutron-deuteron analyzing power data at En=22.5 MeV.” In Physical Review C - Nuclear Physics, Vol. 89, 2014. https://doi.org/10.1103/PhysRevC.89.054001.
Weisel GJ, Tornow W, Crowell AS, Esterline JH, Hale GM, Howell CR, et al. Neutron-deuteron analyzing power data at En=22.5 MeV. In: Physical Review C - Nuclear Physics. 2014.
Weisel, G. J., et al. “Neutron-deuteron analyzing power data at En=22.5 MeV.” Physical Review C - Nuclear Physics, vol. 89, no. 5, 2014. Scopus, doi:10.1103/PhysRevC.89.054001.
Weisel GJ, Tornow W, Crowell AS, Esterline JH, Hale GM, Howell CR, O’Malley PD, Tompkins JR, Witała H. Neutron-deuteron analyzing power data at En=22.5 MeV. Physical Review C - Nuclear Physics. 2014.

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

May 12, 2014

Volume

89

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics