Theoretical study of the radiative lifetime for the spin-forbidden transition A3 summation of U+ to X1 summation of G+ in He2. Final rpt. , Sep 86-Jul 88

Technical Report · Sat Dec 01 04:00:00 EST 1990

OSTI ID:5572211

Chabalowski, C F; Jensen, J O; Yarkony, D R; Lengsfield, B H

The radiative lifetime for the spin-forbidden, dipole allowed transition in neutral He{sub 2} was calculated. This transition is assumed to derive its intensity by spin-orbit (S-O) induced couplings which are treated using first-order perturbation theory. The first-order corrections to the wavefunctions are calculated directly in the configuration state function (CSF) basis by solving a set of linear equations given by first-order perturbation theory for the perturbation to the zeroth-order wavefunctions. This approach eliminates the need to solve explicitly for many eigenstates of the unperturbed Hamiltonian which would be required if the spectral representation for the perturbed wavefunction were used. The results show a rapidly changing electric transition dipole moment as a function of internuclear separation, R(He-He), over the bound region of a potential energy curve.

• Research Organization: Army Armament Research and Development Command, Aberdeen Proving Ground, MD (USA). Ballistics Research Lab.
• OSTI ID: 5572211
• Report Number(s): AD-A-230956/5/XAB; BRL-TR--3184
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CORRECTIONS
COUPLINGS
DIFFERENTIAL EQUATIONS
DIPOLES
ELECTRIC MOMENTS
ELEMENTS
ENERGY
ENERGY-LEVEL TRANSITIONS
EQUATIONS
FLUIDS
FUNCTIONS
GASES
GRAPHS
HAMILTONIAN FUNCTION
HELIUM
MULTIPOLES
NONMETALS
PERTURBATION THEORY
POTENTIAL ENERGY
RARE GASES
SPECTRA
WAVE FUNCTIONS