Australian Journal of Physics Australian Journal of Physics Society
A journal for the publication of original research in all branches of physics

Paul Trap Promotion of Electrons in Atomic Collisions

G. von Oppen, M. Tschersich, R. Drozdowski and M. Busch

Australian Journal of Physics 52(3) 431 - 441
Published: 1999


Electron promotion on rotating potential saddles is proposed as an important and efficient excitation mechanism taking place in atomic collisions at intermediate energies. Measurements on the excitation of atoms by positively charged particles, in particular, excitation of He I states in p–He collisions provides experimental evidence for this ‘Paul trap’ promotion in two-centre Coulomb potentials.

© CSIRO 1999

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