Charge transfer to continuum and high Rydberg states in proton-carbon-foil collisions

Bremsstrahlung during electron capture to continuum

“…The analytic extension of the cross section from bound to continuum states has been discussed by Lucas et al (1980) for nonradiative electron capture. For the radiative processes one can use the same tools (see e.g.…”

Coherence in Grazing Ion-Surface Collisions

“…Expansion of p in the basis of irreducible tensor operators T~ < 28 ) (25) where the components with k = 0, 1, 2 can be associated with "population," "orientation," and "alignment" of magnetic sublevels of terms with orbital angular momenta L. Fine and hyperfine interactions with splittings hw1F,F, yield the time dependences for [(LS)1I]F terms with lifetime T (26) This transfer of anisotropy between orbital angular momenta and electronic/nuclear spins given by equation (26) can be used to perform high-resolution atomic spectroscopy< 30 l and to produce spin-polarized beams after ion-surface scattering.< 31 l The anisotropic sublevel populations of excited terms are generally probed by the polarization of the fluorescence light emitted in transitions between terms with orbital angular momenta L, L 0 • Since after grazing ion-surface scattering the orientation of orbital angular momenta plays a dominant role with respect to the anisotropy obtained, we limit our discussion to the normalized Stokes parameter (27) where I(u-), I(u+) are the intensities of light with negative and positive helicity, respectively. S/ I (and the Stokes parameter describing the linear polarization fraction) is directly related to the tensorial components of the density operator.…”

The polarization of bremsstrahlung from radiative ionization induced by relativistic highly charged projectiles

“…A second process related to RI by means of continuity across the ionization threshold [17] is the radiative electron capture (REC) into bound states of heavy projectiles. Viewed as inverse photoeffect, the REC has attracted much interest during the recent years both theoretically and experimentally [18].…”