Polarization correlations in the two--photon decay of hydrogen--like ions

Details Polarization correlations in the two--photon decay of hydrogen--like ions Polarization correlations in the two--photon decay of hydrogen--like ions

2010-06-24

arxiv.org/abs/1006.4799v1

Hyperfine Interactions, Volume 199, Issue 1 (2011), Page 85-92

Physics

Atomic Physics

Scientific paper

10.1007/s10751-011-0303-y

Polarization properties of the photons emitted in the two-photon decay of hydrogen-like ions are studied within the framework of the density matrix and second-order perturbation theory. In particular, we derive the polarization correlation function that gives the probability of the (two-photon) coincidence measurement performed by polarization-sensitive detectors. Detailed calculations of this function are performed for the $2s_{1/2} \to 1s_{1/2}$ transition in neutral hydrogen as well as Xe$^{53+}$ and U$^{91+}$ ions. The obtained results allow us to understand the influence of relativistic and non-dipole effects on the polarization correlations in the bound-bound two-photon transitions in heavy ions.

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