Parity nonconservation in electron recombination of multiply charged ions

Details Parity nonconservation in electron recombination of multiply charged ions Parity nonconservation in electron recombination of multiply charged ions

2005-04-19

arxiv.org/abs/physics/0504129v2

Phys.Rev. A72 (2005) 032109

Physics

Atomic Physics

11 pages, 5 figures; v.2: sign errors in Eqs.(29-32,38) corrected, figs.4,5 and related discussion changed

Scientific paper

10.1103/PhysRevA.72.032109

We discuss a parity nonconserving asymmetry in the cross section of KLL dielectronic recombination of polarized electrons on the hydrogen-like ions with $Z \lesssim 60$. This effect is strongly enhanced because of the near-degeneracy of doubly-excited $2l2l'$ states of opposite parity in He-like ions. For ions with $Z \sim 30$ the asymmetry is of the order of $10^{-9}$. For $Z \approx 48$ a level crossing takes place, leading to the PNC asymmetry of $\pm 5\times 10^{-9}$, which is $10^8$ times greater than the basic strength of the weak interaction in atoms.

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