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Phys. Rev. A 58, R3379–R3382 (1998)

Observation of an impact-parameter window in low-velocity ionizing collisions of Ne+ on Ne proceeding through quasimolecular states

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M. A. Abdallah1,*, W. Wolff2, H. E. Wolf2, C. L. Cocke1, and M. Stöckli1
1J.R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506
2Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

Received 17 June 1998; published in the issue dated November 1998

Target ionization in collisions of singly charged Ne+ ions with Ne has been investigated at projectile velocities from 0.25 to 0.55 a.u. using electron and recoil momentum imaging techniques. The momentum distributions of the ejected electrons were found to carry a distinct signature strongly suggesting that ionization is taking place by successive promotions through molecular orbitals. The observed recoil transverse momentum distributions are donut-shaped, indicating that single ionization is confined to a well-defined impact-parameter window.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.58.R3379
DOI:
10.1103/PhysRevA.58.R3379
PACS:
34.50.Fa, 39.30.+w

*Present address: Physics Division, ORNL, Oak Ridge, TN 37831-6377. Electronic address: abdallah@mail.phy.ornl.gov

 
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