| EPSRC Reference: |
GR/J75838/01 |
| Title: |
MONTE CARLO MODELLING OF NUCLEAR MAGNETIC RELAXATION IN AMORPHOUS METAL-HYDROGEN SYSTEMS |
| Principal Investigator: |
Titman, Dr J |
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| Department: |
Physics and Astronomy |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 May 1994 |
Ends: |
30 April 1996 |
Value (£): |
59,583
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Summary on Grant Application Form |
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The diffusion of interstitial hydrogen in amorphous alloys is characterised by a distribution of site binding and saddle point energies. The distribution may be studied by means of neutron quasi-elastic scattering and nuclear magnetic relaxation. We have shown that the rf-field dependence of the spin-locked relaxation rate T-1 1p is particularly valuable in this respect and have commenced a programme of measurements of T1p over a wide range of temperature and field strength not covered in previous work. Since the theory of relaxation in disordered systems is not sufficiently advanced for a proper interpretation of these experiments we propose a Monte Carlo calculation of the relaxation rate which, unlike earlier work, pays particular attention to the concentration and temperature dependence, as well as the field dependence, of the rate. There is evidence to show that concentration and temperature effects are particularly sensitive to the balance of site and saddle point disorder in the distribution of activation energy.
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Key Findings |
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Potential use in non-academic contexts |
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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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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |