Electron, Positron and Photon Collisions with Atoms and Molecules
recombination with multicharged ions such as Au25+ or U28+,
has been regarded as a puzzle for a number of years, due to
very high recombination rates and lack of clear resonance
structure. Based on the ideas of many-body quantum chaos [V.
V. Flambaum, A. A. Gribakina, G. F. Gribakin, and M. G. Kozlov,
"Structure of compound states in the chaotic spectrum
of the Ce atom: localization properties, matrix elements,
and enhancement of weak perturbations", Phys. Rev. A
50, 267 (1994)], a statistical theory of electron recombination
with complex ions has been developed [V. V. Flambaum, A. A.
Gribakina, G. F. Gribakin, and C. Harabati, "Electron
recombination with multicharged ions via chaotic many-electron
states", Phys. Rev. A 66, 012713 (2002)]. Its main assumptions
and the properties of chaotic many-electron states have been
tested and verified in numerical calculations of the Au24+
compound ion [G. F. Gribakin and S. Sahoo, "Mixing of
dielectronic and multiply-excited states in electron-ion recombination:
a study of Au24+", J. Phys. B 36, 3349 (2003)]. In addition
with have identified and examined another recombination mechanism
due to target ion polarization by the incident electron [A.
V. Korol, G. F. Gribakin and F. J. Currell, "Effect of
target polarization in electron-ion recombination", Phys.
Rev. Lett. 97, 223201 (2006)]. In most cases stidied this
mechanism leads to a systematic enhancement of the recombination
rate in the energy ranges void of dielectronic resonance,
which is usually assumed to be described by simple radiative
have also proposed that electron-ion recombination can be
used to study the parity nonconservation due to the fundamental
electron-nucleus weak forces in elelctron collisions, and
estimated the size of this effect for highly-charged hydrogen-like
ions [G. F. Gribakin, F. J. Currell, M. G. Kozlov and A. I.
Mikhailov, "Parity nonconservation in electron recombination
of multiply charged ions", Phys. Rev. A 72, 032109 (2005)].