Production and transport of convoy electrons in amorphous carbon foils

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6694257

Gibbons, J P; Elston, S B; DeSerio, R; Biedermann, C; Breinig, M; Gonzalez-Lepera, C E; Heil, O; Huelskoetter, H P; Rothard, H; Sellin, I A; Vane, C R

The production of free convoy electrons, emitted with velocities near the ion velocity in ion-solid collisions, is not well understood. Experiments concerning thickness-dependent yields have suggested the dominant mechanism for convoy production is electron loss to the continuum (ELC) in the bulk of the solid. Free electrons created in the bulk are subject to multiple elastic and inelastic scattering during transport through remaining layers of the solid. We discuss doubly-differential measurements of convoy measurements of convoy electrons as a function of target thickness for fast O/sup 5 +/ ion projectiles incident on carbon foils of varied thicknesses. Angular distributions confirm the ELC model for convoy production. From the radial broadening of the convoy cusps we have determined energy and angular spreading parameters due to post-collisional multiple scattering. 8 refs., 2 figs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA); Tennessee Univ., Knoxville (USA). Dept. of Physics and Astronomy; Frankfurt Univ. (Germany, F.R.). Inst. fuer Kernphysik
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6694257
• Report Number(s): CONF-881151-32; ON: DE89002313
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR DISTRIBUTION
ATOM COLLISIONS
CARBON
CHARGED PARTICLES
CHARGED-PARTICLE TRANSPORT
COLLISIONS
CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FERMIONS
FILMS
INELASTIC SCATTERING
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
LEPTONS
NONMETALS
OXYGEN IONS
PRODUCTION
PROJECTILES
RADIATION TRANSPORT
RYDBERG STATES
SCATTERING
THIN FILMS