The Spin-Orbit Interaction: A Small Force with Large Implications

Manson, Steven T.

doi:10.3390/atoms11060090

Cited by 1 publication

(1 citation statement)

References 21 publications

(26 reference statements)

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“…Owing to the importance of CM in the photoionization of atoms, investigations of the impact of electron-electron correlation, both from relativistic and non-relativistic perspectives, have been performed earlier [16,[20][21][22][23][24][25][26]. In the non-relativistic studies, the location of the CM for a given subshell, as a function of photoelectron energy, was found to increase with the atomic number Z, starting from the Z where the subshell first appeared in the ground state, reached maximum energy, and then decreased in energy, eventually moving below the ionization continuum into the discrete region with further increase of Z [16].…”

Section: Introductionmentioning

confidence: 99%

Cooper minima in high-Z atoms: effects of correlation and relativity on np photoionization

Baral,

Jose,

Deshmukh

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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Photoionization dipole transition matrix elements pass through a zero or attain a minimum that leaves imprints on photoionization parameters like the cross-section, angular distribution asymmetry parameter, phase shift, and photoionization time delay. This minimum is commonly known as the “Cooper minimum” (CM). The CM, in general, is strongly affected by relativistic and correlation effects. Previous works investigated CM in the 6p and 5p subshell photoionization up to Z=100 using the single-particle Dirac-Slater (DS) method. The present work extends the earlier work to Z up to 120 using more accurate methods; Dirac-Hartree-Fock (DHF) which includes the relativistic effects and exchange correlations, and the relativistic random phase approximation (RRPA) which includes both initial and final state electron-electron correlations along with relativistic effects. In addition to the study of photoionization from the 6p and 5p subshells, the 4p subshell has also been investigated in the present work. To demonstrate the prominent effects in the high-Z atoms, Rn (Z=86), Ra (Z=88), No (Z=102), Cn (Z=112), Og (Z=118), and Ubn (Z=120) are investigated.

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