Development of neutron scattering on 60MW research reactor in CIAE

Chen, D.F.; Liu, Y.T.; Gou, Cheng; Ye, C.T.

doi:10.1016/j.physb.2006.05.284

Cited by 24 publications

(8 citation statements)

References 10 publications

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Section: Neutron Sourcesmentioning

confidence: 99%

“…There are several neutronscience facilities worldwide [7][8][9][10][11][12][13][14][15][16][17][18] . Neutron facilities in China include the Heavy Water Research Reactor (HWRR) and the soon to be completed China Advanced Research Reactor (CARR) [7] in the China Institute of Atomic Energy, Beijing, and the China Spallation Neutron Source (CSNS) [8] under construction in Dongguan, Guangdong province. User facilities outside China include the Institut Laue-Langevin (ILL) in Grenoble, France [9] , the ORPHEE reactor at the Laboratoire Léon Brillouin (LLB) in Saclay, France [14] , ISIS at the Rutherford Appleton Laboratory in the United Kingdom [9] , the High Flux Isotope Reactor (HFIR) and the new Spallation Neutron Source (SNS) at Oak Ridge National Laboratory in the USA [15,16] , the Japan Spallation Neutron Source (JSNS) at the Japan Proton Accelerator Research Complex (J-PARC) [17] , and the OPAL reactor at the Australian Nuclear Science and Technology Organisation (ANSTO) [18] .…”

Section: Neutron Sourcesmentioning

confidence: 99%

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Polarized neutron diffraction and its application to spin density studies

Dougan

Chen

2009

Sci. China Ser. B-Chem.

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Spin density distributions in molecular compounds containing unpaired electrons have been studied by polarized neutron diffraction (PND). The spin density distributions provide a unique perspective of the magnetic properties of the compounds. The background and fundamentals of polarized neutron diffraction are summarized in this review, followed by examples of applications in inorganic and organic chemistry. Spin densities in several compounds that are obtained by polarized neutron diffraction are highlighted. Spin densities in single molecular magnet [Fe 8 O 2 (OH) 12 ( tacn) 6 ] 8+ and cyano-bridged K 2 [Mn(H 2 O) 2 ] 3 [Mo(CN) 7 ] 2 ·6H 2 O demonstrate how to obtain magnetic interaction in the complexes by PND. PND studies of Ru(acac) 3 , containing one single unpaired electron, show small spin densities in this complex. Finally the use of PND in studying nitronyl nitroxide radicals is given. Our goal in this review is to illustrate how PND functions and how it serves as a sensitive tool in directly probing spin density in molecules.polarized neutron diffraction, spin (unpaired electron) density, paramagnetic, antiferromagnetic, magnetic structure factor 1 Background Unpaired electrons and magnetic properties of molecular compounds have been extensively studied by multiple spectroscopic methods. For instance, electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) have been used to determine electronic g-tensors and magnetic hyperfine interactions in paramagnetic compounds by employing the magnetic nuclei as local probes [1][2][3][4][5][6] . Since unpaired electrons usually reside in valence molecular orbitals, magnetic properties of the compounds that mainly arise from the unpaired electrons are very sensitive to changes in bonding. The spectroscopic properties, especially EPR, are particularly useful, providing information on the electron configuration of transition metals and spin density distributions in the molecules. While these techniques probe the energetic aspects of the wavefunction and bonding, polarized neutron diffraction (PND) examines the spatial aspects of the wavefunction and bonding in the compounds, giving different features of the bonding. PND is a unique technique in that it directly provides spin density in a compound.

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Section: Neutron Sourcesmentioning

confidence: 99%

Section: Neutron Sourcesmentioning

confidence: 99%

Polarized neutron diffraction and its application to spin density studies

Dougan

Chen

2009

Sci. China Ser. B-Chem.

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“…A set of instruments connecting to 7 horizontal thermal neutron beam tubes are settled in the reactor experiment hall, four of which are dual beam ports. Additionally, cold neutrons produced by a liquid deuterium cold source will be transported to the 30 × 60 m 2 guide hall by 4 neutron guide systems [1][2]. In the first phase of neutron scattering project, ten neutron scattering instruments will be installed.…”

Section: Progress Of Instrumentationmentioning

confidence: 99%

Progress in neutron scattering at CIAE

Wu¹,

Liu²,

Chen³

2013

AIP Conference Proceedings

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“…However, like other neutron scattering experiments, pole figure measurement by neutrons requires an intense neutron source such as a nuclear reactor with at least medium neutron flux, or a spallation neutron source. The China Advanced Research Reactor (CARR) at the China Institute of Atomic Energy (CIAE), with a maximum thermal neutron flux of about 8×10 14 /sec•cm 2 [6,7], is well qualified for neutron texture measurements and other neutron scattering experiments. A number of different types of neutron scattering instruments have now been or are being built around the reactor.…”

Section: Introductionmentioning

confidence: 99%

The neutron texture diffractometer at the China Advanced Research Reactor

Liu

et al. 2016

Chinese Phys. C

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The first neutron texture diffractometer in China has been built at the China Advanced Research Reactor, due to strong demand for texture measurement with neutrons from the domestic user community. This neutron texture diffractometer has high neutron intensity, moderate resolution and is mainly applied to study texture in commonly used industrial materials and engineering components. In this paper, the design and characteristics of this instrument are described. The results for calibration with neutrons and quantitative texture analysis of Zirconium alloy plate are presented. The comparison of texture measurements with the results obtained in HIPPO at LANSCE and Kowari at ANSTO illustrates the reliability of the texture diffractometer.

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Development of neutron scattering on 60MW research reactor in CIAE

Cited by 24 publications

References 10 publications

Polarized neutron diffraction and its application to spin density studies

Polarized neutron diffraction and its application to spin density studies

Progress in neutron scattering at CIAE

The neutron texture diffractometer at the China Advanced Research Reactor

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