Shielding for fast neutron scattering experiments of high sensitivity

Glasgow, D.W.; Velkley, Donald E.; Brandenberger, J.D.; McEllistrem, M. T.; Hennecke, H.J.; Breitenbecher, D.V.

doi:10.1016/0029-554x(74)90178-5

Cited by 26 publications

(4 citation statements)

References 19 publications

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“…The left and right detectors are 5.08 cm long cylinders with diameters of 12.7 cm and 8.89 cm filled with NE-213 and NE-218 liquid scintillator fluid, respectively. Each detector was housed inside a cylindrical shielding enclosure of lithiumdoped paraffin with a double-truncated conical copper collimator [11]. Tungsten shadow bars were positioned to shield the detectors from directly viewing the neutron production cell.…”

Section: Details Of the Experimentsmentioning

confidence: 99%

Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV

et al. 2020

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New measurements of the neutron-neutron quasifree scattering cross section in neutron-deuteron breakup at an incident neutron energy of 10.0 MeV are reported. The experiment setup was optimized to evaluate the technique for determining the integrated beam-target luminosity in neutronneutron coincidence cross-section measurements in neutron-deuteron breakup. The measurements were carried out with a systematic uncertainty of ±5.6%. Our data are in agreement with theoretical calculations performed using the CD-Bonn nucleon-nucleon potential in the Faddeev formalism. The measured integrated cross section over the quasifree peak is 20.5 ± 0.5 (stat) ± 1.1 (sys) mb/sr 2 in comparison with the theory prediction of 20.1 mb/sr 2 . These results validate our technique for determining the beam-target luminosity in neutron-deuteron breakup measurements. *

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Section: Details Of the Experimentsmentioning

confidence: 99%

Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV

et al. 2020

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“…The left and right detectors are filled with NE-213 and NE-218 liquid scintillator, respectively. Each detector is housed inside a cylindrical shielding enclosure of lithium-doped paraffin with a double-truncated conical copper collimator [20]. Tungsten shadow bars were positioned to shield the detectors from directly viewing the neutron production cell.…”

Section: Cross-section Measurements Of Nn Qfs In Nd Breakup At Tunlmentioning

confidence: 99%

Low-Energy QCD: Few-Nucleon Research at TUNL

Howell¹

2020

Proceedings of the 9th International Workshop on Chiral Dynamics — PoS(CD2018)

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The main goal of few-nucleon research at the Triangle Universities Nuclear Laboratory (TUNL) is to perform high-precision measurements that contribute to advancing ab-initio calculations and testing nucleon-interaction models. The current focus is on the three-nucleon system, which has highly developed theory and has sufficient complexity to exhibit influences of threenucleon forces.The few-nucleon measurements performed at the High Intensity Gamma-ray Source (HIγS) and in the tandem lab provide complementary information. We have performed the first exclusive differential cross-section measurements for photodisintegration of 3 He at low energy. The measurements were carried out at an incident beam energy of 15 MeV. A difference in the 1 S 0 neutron-proton scattering length determined in this reaction from the value established by two-nucleon scattering data would be potential evidence for three-nucleon interactions that are not included in current calculations. The strength of the neutron-neutron (nn) 1 S 0 interaction is directly evaluated using nn quasi-free scattering in neutron-deuteron breakup. We are performing measurements of this process at two incident neutron beam energies, 10 and 16 MeV, using substantially different detector setups. The experiment methods and preliminary results of these experiments will be presented. The 9th International workshop on Chiral Dynamics 17

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“…A long transmission path is beneficial for beam collimation and a conical collimator will reduce neutrons scattered on the wall remarkably. It is predictable that a double-truncated conical collimator (type C) will be better for a point source, such as a target on an accelerator [39] .…”

Section: Design and Simulation Of Collimatormentioning

confidence: 99%

The Design and Optimization of a Neutron Time-of-Flight Spectrometer with Double Scintillators for Neutron Diagnostics on EAST

Zhang

Yuan

Xie

et al. 2012

Plasma Sci. Technol.

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Neutron energy spectrometry diagnosis plays an important role in magnetic confinement fusion. A new neutron time-of-flight (TOF) spectrometer with double scintillators is designed and optimized for the EAST tokamak. A set of optimal parameters is obtained by Monte Carlo simulation, based on the GEANT4 and ROOT codes. The electronic setup of the measurement system is designed. The count rate capability is increased by introducing a flash ADC. The designed spectrometer with high resolution and efficiency is capable of being applied to fusion neutron diagnostics. Applications in mixed-energy and continuous energy neutron fields can also be considered.

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Shielding for fast neutron scattering experiments of high sensitivity

Cited by 26 publications

References 19 publications

Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV

Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV

Low-Energy QCD: Few-Nucleon Research at TUNL

The Design and Optimization of a Neutron Time-of-Flight Spectrometer with Double Scintillators for Neutron Diagnostics on EAST

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