Characterization of pyrolytic graphite with cold neutrons

被引：3

作者：

Toft-Petersen, Rasmus ^{[1
,2
]}

Georgii, Robert ^{[3
,6
]}

Schneider, Michael ^{[4
]}

Nishiki, Naomi ^{[5
]}

Boeni, Peter ^{[6
]}

机构：

[1] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

[2] European Spallat Source ESS ERIC, POB 176, SE-22100 Lund, Sweden

[3] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, Lichtenbergstr 1, D-85748 Garching, Germany

[4] SwissNeutron AG, Bruthlstr 28, CH-5313 Klingnau, Switzerland

[5] Panasonic Corp, Mfg Solut Ctr, 2-7 Matsuba Cho, Kadoma, Osaka 5718502, Japan

[6] Tech Univ Munich, Phys Dept E21, James Franck Str 1, D-85748 Garching, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2020年 / 977卷

关键词：

TAS; Multiplexing; Neutron spectroscopy; Inelastic neutron scattering methods; TAS spectroscopy; SPECTROMETER; TRANSMISSION; ANALYZER; IRIS;

D O I：

10.1016/j.nima.2020.164341

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We present a thorough investigation of the diffuse scattering of neutrons from Highly Oriented Pyrolytic Graphite (HOPG) that appears in the tails of the (002) Bragg scattering profile. Using a low background neutron diffraction setup, the elastic diffuse scattering is shown to be a factor of 10(4)-10(7) weaker than the peak intensity of the (002) Bragg reflection. Evidence of inelastic scattering due to phonons is observed, 10(5) times weaker than the Bragg peak. Our results demonstrate the possibility of using HOPG in complex multiplexing geometries to improve the performance of spectrometers involving multi-analyzer back-end systems, and can be helpful in designing such systems for optimal performance.

引用

页数：7

共 50 条

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