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A sample holder for simultaneous Raman and neutron vibrational spectroscopy.
R C Gillis1, Y Q Cheng1, F X Gallmeier1
1Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
The Review of Scientific Instruments
|February 3, 2018
Summary
Researchers developed a novel sample holder for simultaneous Raman and neutron vibrational spectroscopy at cryogenic temperatures. This innovation enables in-situ gas loading and evacuation for materials analysis at the VISION spectrometer.
Area of Science:
- Materials Science
- Spectroscopy
- Condensed Matter Physics
Background:
- Neutron vibrational spectroscopy and Raman spectroscopy are powerful techniques for probing molecular and lattice dynamics.
- Simultaneous measurements can provide complementary information, enhancing structural and dynamic insights.
- Cryogenic temperatures are crucial for studying certain material phases and quantum phenomena.
Purpose of the Study:
- To design and construct a versatile sample holder for combined Raman and neutron vibrational spectroscopy.
- To enable in-situ sample manipulation, including gas loading and evacuation, within a cryogenic environment.
- To demonstrate the capability of the system through measurements on model compounds.
Main Methods:
- Development of a cryogenic sample holder with integrated optical components for Raman spectroscopy.
- Utilizing the VISION neutron vibrational spectrometer at Oak Ridge National Laboratory's Spallation Neutron Source.
- Performing simultaneous Raman and neutron vibrational spectroscopy on 4-nitrophenol and cryogenic hydrogen samples.
Main Results:
- Successful construction and implementation of the simultaneous spectroscopy sample holder.
- Acquisition of simultaneous Raman and neutron vibrational spectra at temperatures as low as 5 K.
- Demonstration of in-situ gas loading/evacuation capabilities within the cryogenic spectrometer.
Conclusions:
- The developed sample holder significantly enhances the capabilities for combined Raman and neutron vibrational spectroscopy.
- This system allows for unprecedented studies of materials under cryogenic conditions with in-situ gas control.
- Future applications include the investigation of hydrogen storage materials, quantum solids, and other low-temperature phenomena.
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