| EPSRC Reference: |
EP/M023729/1 |
| Title: |
Direct Measurement of Correlation Driven Electron Dynamics in an Amino Acid |
| Principal Investigator: |
Underwood, Dr JG |
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| Department: |
Physics and Astronomy |
| Organisation: |
UCL |
| Scheme: |
Overseas Travel Grants (OTGS) |
| Starts: |
27 January 2015 |
Ends: |
26 April 2015 |
Value (£): |
6,990
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| EPSRC Research Topic Classifications: |
| Condensed Matter Physics |
Lasers & Optics |
| Light-Matter Interactions |
Materials Characterisation |
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Summary on Grant Application Form |
All material systems are made up of positively charged nuclei, and negatively charged electrons. The way in which the arrangement of electrons and nuclei respond to external stimuli, such as photons from light, determines their physical and chemical properties. The electrons in materials do not behave as independent particles, and their position and momenta are highly correlated due in part to their mutual Coulombic repulsion. An approach to probing and understanding the correlated behaviour of electrons is to remove one of the electrons and then observe how the remaining electrons adjust in response to the sudden removal of an electron. That is precisely the approach we will follow here; we will employ a short X-ray pulse from a free-electron laser to remove an electron from the Glycine molecule leaving a "hole" in the molecule, and then, with a second time-delayed short X-ray pulse we will probe the evolution of that hole as the electrons adjust. The second "probe" pulse will excite an inner core electron to the energy where the hole was created. As the other electrons readjust, the accessibility of that hole to the core electron will vary. As such, the probability of re-populating the hole with the core electron will evolve in time, providing us with a way to view the electron motion in the molecule. This experiment requires two synchronised laser pulses with duration of 5 fs and with a photon energy of 280 eV. The only place in the world that light pulses with these characteristics are available is at the Linear Coherent Light Source (LCLS) facility at Stanfrod, US.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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