Parity nonconservation in the radiative recombination of electrons with heavy hydrogen-like ions

Abstract

The parity nonconservation effect on the radiative recombination of electrons with heavy hydrogen-like ions is studied. Calculations are performed for the recombination into the 21S0 state of helium-like thorium and gadolinium, where, due to the near-degeneracy of the opposite-parity 21S0 and 23P0 states, the effect is strongly enhanced. Two scenarios for possible experiments are studied. In the first scenario, the electron beam is assumed to be fully polarized while the H-like ions are unpolarized, and the polarization of the emitted photons is not detected. In the second scenario, the linearly polarized photons are detected in an experiment with unpolarized electrons and ions. Corresponding calculations for the recombination into the 23P0 state are presented as well.

First observation of correlated photons emitted by heavy highly charged ions in the process of radiative recombination

“…To accomplish this, a strong Doppler broadening, caused by the angle variation of the photon emission from the relativistic projectile, has been compensated by the granularity of the photon detectors and by a large number of readout channels. The experiment for the first time allows to study alignment of the excited states produced by RR where the photon emission direction is observed [1,2]. Thus it represents a significant step towards the complete experiment of RR as well as of the photoelectric effect in time reversal.…”

Quantum Electrodynamics Effects in Heavy Ions and Atoms

“…[53], where it was proposed to use close opposite-parity levels 2 1 S 0 and 2 3 P 1 in He-like ions for Z ≈ 6 and Z ≈ 29. Later, most of the authors [54][55][56][57][58][59] exploited the near-degeneracy of the 2 1 S 0 and 2 3 P 0 states in He-like ions at Z ≈ 64 and Z ≈ 90, where the PNC effects are strongly enhanced. In particular, in Ref.…”

“…In Ref. [58] we evaluated the PNC effect on the one-photon radiative recombination of an electron with a H-like ion. Here we discuss in more details the scenario of Ref.…”

Parity nonconservation effect in the resonance elastic electron scattering on heavy He-like ions

“…[12]. The PNC effect in the process of radiative recombination of electron with H-like ions was studied in several works [13][14][15]. The parity violation on the laserinduced transition was considered for heavy He-like ions in Ref.…”