Coulomb path'' interference in low energy He sup + + He collisions

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6477046

Swenson, J K ^[1]; Burgdoerfer, J ^[2]; Meyer, F W; Havener, C C; Gregory, D C; Stolterfoht, N ^[3]

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1. Lawrence Livermore National Lab., CA (USA)
2. Tennessee Univ., Knoxville, TN (USA)
3. Oak Ridge National Lab., TN (USA)

A new interference mechanism, analogous to classic'' double-slit electron scattering, has been identified in low energy ion-atom collisions. This Coulomb path'' interference results from the existence of two trajectories, indistinguishable with respect to laboratory energy and emission angle, along which ejected autoionizing electrons may be scattered by the attractive Coulomb potential of the slowly receding spectator ion. We present a simple semi-classical model for this effect in which we account for the path dependence of the amplitude of the ejected electron following decay of the autoionizing state. Calculated model lineshapes are found to be in excellent agreement with strong angular dependence of the interference structure observed in the He target 2s{sup 2} {sup 1}S autoionizing lineshape measured near 0{degree} following 10 keV He{sup +} + He collisions.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER; National Science Foundation (NSF)
• DOE Contract Number: AC05-84OR21400; W-7405-ENG-48
• OSTI ID: 6477046
• Report Number(s): UCRL-JC-105476; CONF-901116-17; ON: DE91001628; TRN: 90-034317
• Resource Relation: Conference: 11. international conference on the application of accelerators in research and industry, Denton, TX (USA), 5-8 Nov 1990
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ION-ATOM COLLISIONS
SEMICLASSICAL APPROXIMATION
AUTOIONIZATION
COULOMB FIELD
CROSS SECTIONS
HELIUM IONS
LINE WIDTHS
SCATTERING
TRAJECTORIES
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
ELECTRIC FIELDS
ELEMENTS
FLUIDS
GASES
ION COLLISIONS
IONIZATION
IONS
NONMETALS
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena