Alam Qasmi, Ghulam Dastgir;
(1967)
Electron capture by multiply charged ions.
Doctoral thesis , UCL (University College London).
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Abstract
The differential electron capture probabilities were measured for the processes 0++ + Ne --+ 0+ + Ne+ and 0++ + He -b 0+ + He+ at impact energies of 1200 and 2600 eV. The mass analysed 0++ beam was injected into a single collision reaction region and scattered 0+ and 0++ ion intensities measured as a function of angle. This angular data was reduced in terms of the differential electron capture probabilities as a function of impact parameter. The results are qualitatively compared with the theoretical predictions of the semi-classical impact parameter treatment and those based on the pseudo-crossing of potential energy curves. The form of the oscillations in the 1200 eV data for the (0++,Ne) reaction is similar to those encountered in singly charged ion-atom collisions in the absence of curve crossing. However the oscillations in the 2600 eV impact energy data for (0++,Ne) and the 1200 eV data for (04-1-,He) indicate that curve crossing takes place. It is possible that experiments of this type could be used to provide, by inspection of the probability functions, a test for whether curve crossing takes place although there is as yet no corroborative body of experimental evidence.
| Type: | Thesis (Doctoral) |
|---|---|
| Title: | Electron capture by multiply charged ions |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Thesis digitised by EThOS. |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1572456 |
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