Application of many-body perturbation theory to weak interactions in alkali atoms

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:7194081

Idrees, M

Many-body perturbation theory (MBPT) is applied to calculations of energies, allowed transition amplitudes, hyperfine constants, parity-violating amplitudes, and electric-dipole-moment enhancement factors. The hyperfine constants and the transition amplitudes are calculated to third order, whereas, valence-ionization energies and weak-interaction effects are evaluated only to second order. Agreement with experiment at the 1% level is found for the hyperfine constants, allowed-transition amplitudes, and valence energies in all the atoms considered. The parity-violating E1 amplitude in cesium for 6s ..-->.. 7s transition is found to be Im(E1) = (0.890 +/- 0.085) x 10/sup -11/(ea/sub 0/ Q/sub w//N), and the parity-violating E1 amplitude in thallium for the 6p1/2 ..-->.. 7p1/2 transition is found to be Im(E1) = (-0.971 +/- 0.085) x 10/sup -10/(ea/sub 2/ Q/sub w//N), where Q/sub w/ is the weak charge of the nucleus and N is the number of neutrons. These amplitudes are in good agreement with the corresponding experimental values for Cs and Tl. Comparisons of the present results with other calculations and with experimental data are presented, discussed, and conclusions are drawn.

• Research Organization: Notre Dame Univ., IN (USA)
• OSTI ID: 7194081
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
AMPLITUDES
ATOMS
BASIC INTERACTIONS
CESIUM
DIPOLE MOMENTS
ELECTRIC DIPOLE MOMENTS
ELECTRIC MOMENTS
ELEMENTS
HYPERFINE STRUCTURE
INTERACTIONS
METALS
PARITY
PARTICLE PROPERTIES
PERTURBATION THEORY
THALLIUM
TRANSITION AMPLITUDES
WEAK INTERACTIONS