Rotational Excitations in Solid Hydrogen

Lead Research Organisation: University of Edinburgh
Department Name: Sch of Physics and Astronomy


The lowest pressure phase of solid hydrogen comprises a hexagonally close packed structure of molecular hydrogen. X-ray and neutron studies can detect the mean nuclear position, but the orientational behaviour is more complicated. Raman spectroscopy at the lowest pressures, shows that the molecules adopt free rotor behaviour. However when pressure increases the identification of the single rotational levels becomes more complicated, as these low frequency bands significantly broaden. This project aims to develop the theory for the Raman signal from an inhibited quantum rotor. Comparing the predicted spectra with experimental data will provide new insight into the nature of the solid phases of hydrogen under pressure.


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Cooke P (2020) Raman signal from a hindered hydrogen rotor in Physical Review B

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Peña-Alvarez M (2020) Quantitative Rotational to Librational Transition in Dense H and D. in The journal of physical chemistry letters

Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/N509644/1 01/10/2016 30/09/2021
1941676 Studentship EP/N509644/1 01/09/2017 31/08/2021 Peter Ivan Cooke
Description Support for the UKCP consortium
Amount £471,671 (GBP)
Funding ID EP/P022561/1 
Organisation Engineering and Physical Sciences Research Council (EPSRC) 
Sector Public
Country United Kingdom
Start 04/2017 
End 06/2021