Differential electron emission in multi-charged ion atom collisions: Systematics for distant and close collisions

Conference · Sat Jun 05 00:00:00 EDT 1993 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6023599

DuBois, R D; Toburen, L H; Middendorf, M E ^[1]; Jagutzki, O ^[2]

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1. Pacific Northwest Laboratory, Richland, Washington 99352 (United States)
2. Institute fuer Kernphysik der J.W. Goethe Universitaet Frankfurt, Frankfurt/M, D-6000 (Germany)

Absolute doubly differential cross sections for electron emission are presented for 0.5 MeV/u multi-charged ion impact on helium, neon, and argon targets. For the helium target, B[sup q+], C[sup q+] (q=2--5) and O[sup q+], F[sup q+] (q=3--6) projectiles were studied; for neaon and argon, only C[sup q+] (q=2--5) projectiles were used. Electron emission for 10[degree][le][Theta][le]60[degree] was studied. The measured cross sections were assumed to scale as the square of an effective projectile charge, Z[sub eff], which was determined as a function of emitted electron energy and angle. For distant collisions (low emitted electron energies), we find that Z[sub eff][approx]q for small q and Z[sub eff][lt]q for the highest values of q investigated. For sufficiently close collisions (above the binary encounter peak), Z[sub eff][gt]Z and increases as q decreases. This is true for all angles and targets investigated.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6023599
• Report Number(s): CONF-920948--
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Vol. 274:1; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
BORON IONS
CARBON IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY RANGE
FLUIDS
FLUORINE IONS
GASES
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MEV RANGE
MULTICHARGED IONS
NEON
NONMETALS
OXYGEN IONS
RARE GASES