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Analyzing Power of 3He(n, n)3He Between 1.60 and 5.54 MeV

Publication ,  Conference
Esterline, J; Tornow, W
Published in: Few-Body Systems
August 1, 2013

We report the measurements of the analyzing power Ay(θ) of n-3He elastic scattering with unprecedented accuracy and angular coverage at five incident neutron energies between 1.60 and 5.54 MeV. To this end, we employed the polarization-transfer reactions 3H(p, n)3He and 2H(d, n)3He at 0° for neutron generation and a recently developed high-pressure 3He gas scintillator as an active target, enabling neutron-time-of-flight and 3He recoil-energy determinations. We obtained simultaneously the neutron polarization with a 4He-based polarimeter, capitalizing on the well-known n-4He Ay(θ). Our n-3He Ay(θ) data are compared to rigorous four-nucleon calculations using high-precision nucleon-nucleon potential models. The agreement between data and calculations is fair at the lower energies and becomes less satisfactory with increasing neutron energy. However, in comparison to the pure isotriplet p-3He system in the same energy region, the agreement between measured and calculated Ay is much better for the mixed (isotriplet and isosinglet) n-3He system, indicating large and somewhat counterintuitive isospin effects. We note that the incorporation of a Δ-mediated three-nucleon force in calculations of n-3He scattering was found to affect A y(θ) negligibly, suggesting the need for the reconsideration of fundamental interactions in resolving the four-nucleon analyzing power puzzle first established about a decade ago in p-3He scattering. © 2013 Springer-Verlag Wien.

Duke Scholars

Published In

Few-Body Systems

DOI

ISSN

0177-7963

Publication Date

August 1, 2013

Volume

54

Issue

7-10

Start / End Page

1323 / 1326

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 5102 Atomic, molecular and optical physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics
 

Citation

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Esterline, J., & Tornow, W. (2013). Analyzing Power of 3He(n, n)3He Between 1.60 and 5.54 MeV. In Few-Body Systems (Vol. 54, pp. 1323–1326). https://doi.org/10.1007/s00601-013-0595-3
Esterline, J., and W. Tornow. “Analyzing Power of 3He(n, n)3He Between 1.60 and 5.54 MeV.” In Few-Body Systems, 54:1323–26, 2013. https://doi.org/10.1007/s00601-013-0595-3.
Esterline J, Tornow W. Analyzing Power of 3He(n, n)3He Between 1.60 and 5.54 MeV. In: Few-Body Systems. 2013. p. 1323–6.
Esterline, J., and W. Tornow. “Analyzing Power of 3He(n, n)3He Between 1.60 and 5.54 MeV.” Few-Body Systems, vol. 54, no. 7–10, 2013, pp. 1323–26. Scopus, doi:10.1007/s00601-013-0595-3.
Esterline J, Tornow W. Analyzing Power of 3He(n, n)3He Between 1.60 and 5.54 MeV. Few-Body Systems. 2013. p. 1323–1326.
Journal cover image

Published In

Few-Body Systems

DOI

ISSN

0177-7963

Publication Date

August 1, 2013

Volume

54

Issue

7-10

Start / End Page

1323 / 1326

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 5102 Atomic, molecular and optical physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics