Production and diagnostics of spin-polarized heavy ions in sequential two-electron radiative recombination

摘要

In the present work we investigate the sequential radiative recombination (RR) of initially bare ions collidingnwith two spatially separated electron targets. It is shown that magnetic sublevel population of the hydrogenlikenions, produced by the electron capture from the first target, depends on the emission direction of the (first) RRnphoton. This population, which can be expressed in terms of the polarization parameters, affects then the angularnand polarization properties of the radiation emitted in the collision with the second target. The coincidencenmeasurements of two subsequent RR photons may allow one to understand, therefore, the production andndiagnostics of the ion spin polarization. In order to describe this polarization production and diagnostic schemenwe derive the general expression for the γ -γ correlation function. Detailed calculations for the dependence of thisnfunction on the geometry of photon emission and collision energy are performed for the radiative recombinationnof bare uranium ions.