Repulsive wall potentials for He-(Ne,Ar,Kr,Xe) as inferred from differential cross sections

Journal Article · Sat May 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:281256

Nitz, D E; Larson, J; Swanson, K; Wildgoose, C

We have obtained representations of the He-(Ne,Ar,Kr,Xe) ground state repulsive walls using model potentials optimized to fit published absolute differential cross section data for 500 and 1500 eV collisions. The HeNe potential, like the He{sub 2} potentials can be fit using the semi-empirical HFD-B form constrained to cross zero at the proper internuclear separation. For the heavier atoms, this approach is unsuccessful and superior fits are obtained using only the purely repulsive V(r) - A EXP [-{alpha}r - {beta}r{sup 2}] term of the HFD-B potential. Comparison of fitted potentials with previous results will be presented.

• OSTI ID: 281256
• Report Number(s): CONF-9305421--; CNN: Grant PHY-9103015
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ATOM-ATOM COLLISIONS
DIFFERENTIAL CROSS SECTIONS
GROUND STATES
HELIUM
POTENTIALS
RARE GASES