Abstract
We present measurements of n-d analyzing power, , at En = 21.0 MeV. The experiment produces neutrons via the 2H(, )3He reaction and 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 gate in the center-detector pulse-height spectrum. Beam polarization is monitored by using a high-pressure helium gas scintillator. The n-d data at 21.0 MeV show a significant discrepancy with the results of rigorous three-body calculations and are consistent with data taken previously by us at 19.0 and 22.5 MeV. We review the overall energy dependence of the three-nucleon analyzing power puzzle in neutron-deuteron elastic scattering, using the best data available. We find that the relative difference between calculations and data is nearly constant at 25% up to En = 22.5 MeV.
| Original language | English (US) |
|---|---|
| Article number | 085106 |
| Journal | Journal of Physics G: Nuclear and Particle Physics |
| Volume | 42 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 1 2015 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Neutron-deuteron analyzing power data at En = 21 MeV and the energy dependence of the three-nucleon analyzing power puzzle. / Weisel, Gary; Tornow, W.; Esterline, J. H.
In: Journal of Physics G: Nuclear and Particle Physics, Vol. 42, No. 8, 085106, 01.08.2015.Research output: Contribution to journal › Article
TY - JOUR
T1 - Neutron-deuteron analyzing power data at En = 21 MeV and the energy dependence of the three-nucleon analyzing power puzzle
AU - Weisel, Gary
AU - Tornow, W.
AU - Esterline, J. H.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - We present measurements of n-d analyzing power, , at En = 21.0 MeV. The experiment produces neutrons via the 2H(, )3He reaction and 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 gate in the center-detector pulse-height spectrum. Beam polarization is monitored by using a high-pressure helium gas scintillator. The n-d data at 21.0 MeV show a significant discrepancy with the results of rigorous three-body calculations and are consistent with data taken previously by us at 19.0 and 22.5 MeV. We review the overall energy dependence of the three-nucleon analyzing power puzzle in neutron-deuteron elastic scattering, using the best data available. We find that the relative difference between calculations and data is nearly constant at 25% up to En = 22.5 MeV.
AB - We present measurements of n-d analyzing power, , at En = 21.0 MeV. The experiment produces neutrons via the 2H(, )3He reaction and 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 gate in the center-detector pulse-height spectrum. Beam polarization is monitored by using a high-pressure helium gas scintillator. The n-d data at 21.0 MeV show a significant discrepancy with the results of rigorous three-body calculations and are consistent with data taken previously by us at 19.0 and 22.5 MeV. We review the overall energy dependence of the three-nucleon analyzing power puzzle in neutron-deuteron elastic scattering, using the best data available. We find that the relative difference between calculations and data is nearly constant at 25% up to En = 22.5 MeV.
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U2 - 10.1088/0954-3899/42/8/085106
DO - 10.1088/0954-3899/42/8/085106
M3 - Article
AN - SCOPUS:84937459702
VL - 42
JO - Journal of Physics G: Nuclear and Particle Physics
JF - Journal of Physics G: Nuclear and Particle Physics
SN - 0954-3899
IS - 8
M1 - 085106
ER -