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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1107/S1600576719003078
|2 doi
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|a eng
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1 |
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|a McMonagle, Charles James
|e verfasserin
|4 aut
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| 245 |
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|a Reducing the background of ultra-low-temperature X-ray diffraction data through new methods and advanced materials
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 15.07.2024
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|a published: Electronic-eCollection
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|a Citation Status PubMed-not-MEDLINE
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|a New methods and advanced materials that significantly reduce the background when collecting single-crystal X-ray diffraction data at ultra-low temperatures using a closed-cycle helium refrigerator are presented here. These include a magnetically controlled internal beamstop and a separate internal collimator that together completely remove the scattering contribution to the background from the beryllium vacuum chamber. Additionally, a new radiation shield made from flexible graphite significantly reduces the background and maintains excellent thermal properties. In combination these improvements have led to a sixfold reduction in the average intensity and a 15-fold reduction in peak intensity of the background observed for diffraction experiments conducted with a closed-cycle helium refrigerator. Moreover, access to ultra-low base temperatures, 2.05 K, has been maintained. The design and implementation of these methods are discussed along with a case study of vitamin C to demonstrate the effectiveness of the improvements
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|a Journal Article
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|a X-ray diffraction
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|a cryostats
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| 650 |
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|a data collection
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| 650 |
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|a low-temperature diffraction
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| 650 |
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4 |
|a technique development
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| 700 |
1 |
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|a Probert, Michael Richard
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of applied crystallography
|d 1998
|g 52(2019), Pt 2 vom: 01. Apr., Seite 445-450
|w (DE-627)NLM098121561
|x 0021-8898
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| 773 |
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|g volume:52
|g year:2019
|g number:Pt 2
|g day:01
|g month:04
|g pages:445-450
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|u http://dx.doi.org/10.1107/S1600576719003078
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|d 52
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|h 445-450
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