Generalized oscillator strengths for the 3d electrons of Cs, Ba, and Xe: Effects of spin-orbit-activated interchannel coupling

Journal Article · Thu Jun 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787508

Amusia, M Ya ^[1]; Chernysheva, L V ^[2]; Felfli, Z; Msezane, A Z ^[3]

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1. Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)
2. A. F. Ioffe Physical- Technical Institute, St. Petersburg 194021 (Russian Federation)
3. Center for Theoretical Studies of Physical Systems, Clark Atlanta University, Atlanta, Georgia 30314 (United States)

This paper investigates for the first time ever the use of the spin-orbit interaction to probe correlation effects in the generalized oscillator strength (GOS) of the 3d subshells of Cs, Ba, and Xe, viz. we study how the GOSs of the Cs, Ba, and Xe 3d{sub 3/2} and 3d{sub 5/2} levels are affected by the intradoublet correlations. The calculations are carried out using the Hartree-Fock approximation and within the framework of a modified version of the spin-polarized random phase approximation with exchange, which takes into account multielectron correlation effects. The effects of relaxation of the excited electrons due to the creation of the 3d vacancy are also accounted for. Our GOS results for Cs, Ba, and Xe, obtained for values of the momentum transfer q from 0 to 4 a.u. and energy transfer {omega} from 0.1 to 8 Ry, demonstrate the strong interaction between the components of the spin-orbit doublet of the 3d electrons in Cs, Ba, and Xe. This leads to the appearance of an additional maximum in the GOS for the 3d{sub 5/2} subshell, due to the action of the 3d{sub 3/2} electrons. Additionally, for the dipole transition in Cs and Ba, the 3d{sub 5/2} subshell perturbs the 3d{sub 3/2} strongly for q=4 a.u. only, while in Xe, the perturbation is at the {omega} value of approximately 58 Ry for all considered q values. It is concluded that the intradoublet correlations are generally very important in the dipole, monopole, and quadrupole transitions, but particularly in the dipole transition.

• OSTI ID: 20787508
• Journal Information: Physical Review. A, Vol. 73, Issue 6; Other Information: DOI: 10.1103/PhysRevA.73.062716; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BARIUM
CESIUM
CORRELATIONS
DIPOLES
DISTURBANCES
ELECTRON-ATOM COLLISIONS
ELECTRONS
ENERGY TRANSFER
EXCITATION
EXCITED STATES
HARTREE-FOCK METHOD
L-S COUPLING
MOMENTUM TRANSFER
ORBITS
OSCILLATOR STRENGTHS
QUADRUPOLES
RANDOM PHASE APPROXIMATION
RELAXATION
SPIN
SPIN ORIENTATION
VACANCIES
XENON