Relativistic Random-phase Approximation Calculations Research Articles

Polarizabilities of heavy closed-shell atoms from the relativistic local density approximation

Static polarizabilities of various closed-shell atoms are calculated using linear response theory in the relativistic local density approximation, with special attention to atoms of high nuclear charge. For atoms with closed outer np subshells the resulting values are found to be in good agreement with other determinations. For atoms with closed outer ns subshells the present values are considerably smaller than those from relativistic random-phase approximation calculations and in better agreement with recommended values.

Angular distribution of Xe5s→εp photoelectrons: a sensitive test of theory

The angular asymmetry parameter beta for 5s photoionisation in xenon has been measured in the energy range where the relativistic random-phase approximation (RRPA) including 5s, 5p and 4d interchannel couplings predicts a strong deviation from the nonrelativistic value of two. The authors' data clearly show a deviation from the value two but not as pronounced as predicted by the RRPA calculation. This indicates that the theory has to be further improved in this case.

Totally polarized electrons from photoionization of outer subshells of rare gases: a relativistic random phase approximation calculation

Abstract Photoelectrons ejected from the outer p 1 2 subshells of the rare gases Ar, Kr, and Xe are shown to be totally polarized at certain energies in the vacuum ultraviolet region of the spectrum. These photoelectrons may provide a favorable source of polarized electrons.