| EPSRC Reference: |
GR/R90260/01 |
| Title: |
SHORT PULSE INTERACTIONS WITH POSITIVE ATOMIC AND MOLECULAR IONS |
| Principal Investigator: |
Newell, Professor WR |
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| Department: |
Physics and Astronomy |
| Organisation: |
UCL |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 2003 |
Ends: |
31 August 2006 |
Value (£): |
227,803
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| EPSRC Research Topic Classifications: |
| Light-Matter Interactions |
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Summary on Grant Application Form |
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This is an investigation of the interaction of intense (10' -10' Wcm 2) laser radiation (800 and 400 nm) with positive atomic and molecular ions. Although all natural molecular rotational and most vibrational motion is frozen in a 40 is pulse the molecule will interact dynamically with the laser field. This produces orbital distortions resulting in molecular ions stretching to new equilibrium positions (- 2 x Ro) and induced bending before dissociation. In addition molecular re-alignment, resulting from the anistropic polarization, produces fragmenting ions along directions orthogonal to the symmetry axis. There is furthermore recent evidence for the formation of light induced bound vibrational states of molecules in intense fields. The proposed research involves a study of these dynamical interactions within high density laser fields through observation of the energy and angular distributions of fragmenting molecular ions via the detection of both ion and neutral products.Sequential and non-sequential models, invoking the rescattering of the first ionised electron from the ionic core, have been proposed recently to explain the proposed multiple ionisation of atoms in intense laser fields. The proposed research will investigate this phenomenon, with posiitve ions, rather than neutral atoms, forming the initial target.
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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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