Theory of united-atom rotational coupling in H/sup +/+He collisions

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.1787· OSTI ID:5085795

Macek, J; Wang, C

United-atom 2psigma-2p..pi.. rotational coupling in asymmetric collisions is influenced by the avoided crossing between the 2psigma and 2ssigma orbits. We study this influence using the HeH/sup +/ system as a prototype. The time-dependent Schroedinger equation is solved numerically in the basis of ..sigma../sub 2/-..sigma../sub 3/-..pi../sub 1/ molecular states. We find substantial population of the 2ssigma state, in disagreement with estimates based on the Landau-Zener model. The ..sigma../sub 3/ level is populated directed by transitions near the avoided crossing at b = 0.4 a.u. and indirectly by ..sigma../sub 2/-..pi../sub 1/-..sigma../sub 3/ rotational coupling for b>0.4 a.u.

• Research Organization: Behlen Laboratory of Physics, The University of Nebraska, Lincoln, Nebraska 68588-0111
• OSTI ID: 5085795
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 34:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
ATOM COLLISIONS
CATIONS
CHARGED PARTICLES
COLLISIONS
COUPLING
DIFFERENTIAL EQUATIONS
ELEMENTS
ENERGY LEVELS
EQUATIONS
EXCITED STATES
FLUIDS
GASES
HELIUM
HELIUM COMPOUNDS
HELIUM HYDRIDES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MOLECULAR IONS
NONMETALS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
RARE GAS COMPOUNDS
RARE GASES
ROTATIONAL STATES
SCHROEDINGER EQUATION
WAVE EQUATIONS