Methodology for accounting of background in a neutron experiment with a 2D position-sensitive detector

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Дәйексөз келтіру

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Аннотация

A methodology for measuring and taking into account the background in a neutron single-crystal experiment with a position-sensitive detector is proposed. This methodology makes it possible to increase the ratio of integrated intensities to the standard deviation I/σ(I) for the diffraction reflection intensities and include in the array of experimental data the weak reflections that previously did not meet the condition I/σ(I)>3, and were not taken into account in crystallographic calculations. The methodology was tested on experimental data during structural studies of a Cs4(HSO4)3(H2PO4) crystals on the MOND diffractometer at the IR-8 reactor of the National Research Center “Kurchatov Institute”.

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Авторлар туралы

N. Isakova

National Research Center “Kurchatov Institute”

Хат алмасуға жауапты Автор.
Email: Isakova_NN@nrcki.ru
Ресей, 123182, Moscow, 1 Academika Kurchatova pl.

A. Kalyukanov

National Research Center “Kurchatov Institute”

Email: Isakova_NN@nrcki.ru
Ресей, 123182, Moscow, 1 Academika Kurchatova pl.

I. Makarova

National Research Center “Kurchatov Institute”

Email: Isakova_NN@nrcki.ru

Shubnikov Institute of Crystallography, Kurchatov Complex of Crystallography and Photonics

Ресей, Moscow, 119333, 59 Leninsky pr.

V. Em

National Research Center “Kurchatov Institute”

Email: Isakova_NN@nrcki.ru
Ресей, 123182, Moscow, 1 Academika Kurchatova pl.

Әдебиет тізімі

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Әрекет
1. JATS XML
Жүктеу
2. Fig. 1. Registered total intensity Ip (a) and diffraction reflection intensity (integrated intensity) Is (b).

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3. Fig. 2. Experimental frame read from the mar345 detector. The insets show enlarged images of weak reflections.

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4. Fig. 3. Averaging the background over 10 (a) and 60 (b) frames.

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5. Fig. 4. Application of the moving average method to a two-dimensional data array.

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6. Fig. 5. Registered frame before background subtraction (left) and after (right) (a); reflection region before background subtraction (left) and after (right) (b); reflection profile before background subtraction (1), averaged background (2) and reflection profile after background subtraction (3) (c).

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7. Fig. 6. The main motif of the structure of Cs4(HSO4)3(H2PO4) crystals. Hydrogen bonds are shown, including those with dynamically disordered H3 positions.

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