Study of one- and two-electron processes in slow He{sup 2+}-He collisions
- Bereich Theorie, Berlin (Germany)
Electron processes in 4 - 65 keV/u ER He{sup 2+}- He collisions are studied theoretically within the semiclassical close-coupling method. Electron transfer, excitation, transfer excitation, and double-transfer cross sections are determined for final states ranging up to the n=4 shell of target or projectile, from which visible light emission takes place. In slow collisions, the authors find that, surprisingly, the cross section for populating, through single transfer, a given He{sup +} projectile state is about the same as the cross section for populating, through transfer-excitation, the same state in the target ion. A similar relation is found between single-excitation and double-transfer cross sections. This observation is interpreted as arising from the quasimolecular character of the collision, it agrees with recently measured line-emission cross sections. This work is part of a coordinated effort of support for the experimental programme at the European fusion facility JET, Culham, England. It links closely with the experimental work at Groningen, The Netherlands, and CTMC calculations at Rolla, Missouri.
- OSTI ID:
- 199654
- Report Number(s):
- CONF-941129--
- Country of Publication:
- United States
- Language:
- English
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