Breit-Pauli and Direct Perturbation Theory Calculations of Relativistic Helium Polarizability

Journal Article · Mon Jun 18 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.86.5675· OSTI ID:40204666

Cencek, Wojciech; Szalewicz, Krzysztof; Jeziorski, Bogumil

Large Gaussian-type geminal wave function expansions and direct perturbation theory (DPT) of relativistic effects have been applied to calculate the relativistic contribution to the static dipole polarizability of the helium atom. It has been demonstrated that DPT is superior for this purpose to traditional Breit-Pauli calculations. The resulting value of the molar polarizability of {sup 4}He is 0.517254(1) cm{sup 3}mol{sup {minus}1} , including a literature estimate of QED effects. As a by-product, a very accurate value of the nonrelativistic helium second hyperpolarizability, {gamma}=43.104227(1) atomic units (without the mass-polarization correction), has been obtained.

• Sponsoring Organization: (US)
• OSTI ID: 40204666
• Journal Information: Physical Review Letters, Vol. 86, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.86.5675; Othernumber: PRLTAO000086000025005675000001; 002126PRL; PBD: 18 Jun 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIPOLES
HELIUM
PERTURBATION THEORY
POLARIZABILITY
WAVE FUNCTIONS