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- W4283332016 abstract "A study of Cooper minima (CM) arising from the photoionization of $6s$, 5s, and $4s$ subshells of high-$Z$ atoms has been performed using Dirac-Fock (DF), two-channel relativistic-random-phase approximation (RRPA), and fully coupled RRPA. The results show huge splittings between $nsensuremath{rightarrow}ensuremath{varepsilon}{p}_{3/2}$ and $mathrm{ns}ensuremath{rightarrow}ensuremath{varepsilon}{p}_{1/2}$ CM which increase with $Z$ owing primarily to the relativistic interactions (spin orbit) that are attractive for the $ensuremath{varepsilon}{p}_{1/2}$ final state but repulsive for the corresponding $ensuremath{varepsilon}{p}_{3/2}$. In addition, it was found that correlation in the form of interchannel coupling (essentially configuration interaction in the final continuum states) plays a huge role in determining the location of the CM. For $6s$ photoionization, the $6sensuremath{rightarrow}ensuremath{varepsilon}{p}_{3/2}$ and $6sensuremath{rightarrow}ensuremath{varepsilon}{p}_{1/2}$ CM behave completely different as a function of $Z$. It was also found that for $5s$ and $4s$ photoionization, the CM move below the threshold, with increasing $Z$, and, at high enough $Z$, the $5sensuremath{rightarrow}ensuremath{varepsilon}{p}_{3/2}$ and $4sensuremath{rightarrow}ensuremath{varepsilon}{p}_{3/2}$ CM re-emerge into the continuum. The calculations have been carried out for the $ns$ subshells of Hg ($Z=80$), Rn ($Z=86$), Ra ($Z=88$), No ($Z=102$), Cn ($Z=112$), and Og ($Z=118$)." @default.
- W4283332016 created "2022-06-24" @default.
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- W4283332016 date "2022-06-23" @default.
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- W4283332016 title "Unusual behavior of Cooper minima of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>n</mml:mi><mml:mi>s</mml:mi></mml:mrow></mml:math> subshells in high- <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>Z</mml:mi></mml:mrow></mml:math> atoms" @default.
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- W4283332016 doi "https://doi.org/10.1103/physreva.105.062819" @default.
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