ISIS Neutron and Muon Source Data Journal

Time-resolved radiography of hydrogen samples while converting in the presence of a catalyst

Abstract: Hydrogen is the molecule of choice for the moderation of cold neutrons at international facilities. It manifests itself in one of two different forms: a state with nuclear spins parallel to each other (orthohydrogen, oH), and one with the nuclear spins anti parallel (parahydrogen, pH). Cold neutrons experience destructive interference when scattering from pH, a phenomenon largely suppressing the neutron cross section, a fundamental feature to optimise time pulses of moderated neutrons. Neutron facilities generally use catalysts to speed up the conversion of oH into pH, as the natural conversion rate would require weeks in order to obtain high levels of pH. This experiment will shed light onto the catalytic conversion phenomena by obtaining a map of the pH concentration around the catalyst, a piece of information that will allow optimisation, for example, of neutron moderators.

Principal Investigator: Professor Giovanni Romanelli
Experimenter: Dr Matthew Krzystyniak
Experimenter: Dr Goran Skoro
Experimenter: Professor Felix Fernandez-Alonso
Experimenter: Professor Triestino Minniti

DOI: 10.5286/ISIS.E.RB1810138

ISIS Experiment Number: RB1810138

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Giovanni Romanelli et al; (2018): Time-resolved radiography of hydrogen samples while converting in the presence of a catalyst, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810138

Data is released under the CC-BY-4.0 license.