Dynamic scalar and tensor polarizabilities of the 2 [sup 1][ital P] and 2 [sup 3][ital P] states of He

Journal Article · Tue Feb 01 00:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.829· OSTI ID:5191319

Rerat, M; Pouchan, C ^[1]

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1. Laboratoire de Chimie Structurale, Universite de Pau, 64000 Pau (France)

The dynamic dipole polarizabilities at real and imaginary frequencies have been determined for the helium atom in its lowest singlet and triplet 2[ital P] states, using our time-dependent gauge-invariant method. Contributions of the 2[ital S] states to static polarizabilities are strong and negative, particularly in the case of the singlet 2 [sup 1][ital P] state, for which the static scalar polarizability [alpha][sub 0] is negative. The tensor polarizability [alpha][sub 2] corresponding to the differential Stark shift between the [ital m] Zeeman sublevels was also calculated and compared to previous theoretical and experimental results for the singlet 2 [sup 1][ital P] state. An evaluation of the [ital C][sub 6] dispersion coefficients for the 2 [sup 1][ital P]--2 [sup 1][ital P] and 2 [sup 3][ital P]--2 [sup 3][ital P] systems is also given, derived from the dynamic polarizabilities at imaginary pulsations [omega].

• OSTI ID: 5191319
• Journal Information: Physical Review A; (United States), Vol. 49:2; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
POLARIZABILITY
CALCULATION METHODS
DIPOLES
FREQUENCY DEPENDENCE
GAUGE INVARIANCE
P STATES
SCALARS
TENSORS
TIME DEPENDENCE
TRIPLETS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
INVARIANCE PRINCIPLES
MULTIPLETS
MULTIPOLES
NONMETALS
PHYSICAL PROPERTIES
RARE GASES
664100* - Theory of Electronic Structure of Atoms & Molecules- (1992-)