
TY  - JOUR
A1  - Gribakin, G. F. 
A1  - Gribakina, A. A. 
A1  - Flambaum, V. V. 
T1  - Quantum Chaos in Multicharged Ions and Statistical Approach to the Calculation of Electron&#8211;Ion Resonant Radiative Recombination
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1999
VL  - 52
IS  - 3
SP  - 443
EP  - 457
KW  - 
UR  - https://doi.org/10.1071/PH98093 
N2  - We show that the spectrum and eigenstates of open-shell multicharged atomic ions near the ionisation threshold are chaotic, as a result of extremely high level densities of multiply excited electron states (103 eV&#8211;1 in Au24+) and strong configuration mixing. This complexity enables one to use statistical methods to analyse the system. We examine the dependence of the orbital occupation numbers and single-particle energies on the excitation energy of the system, and show that the occupation numbers are described by the Fermi&#8211;Dirac distribution, and the temperature and chemical potential can be introduced. The Fermi&#8211;Dirac temperature is close to the temperature defined through the canonical distribution. Using a statistical approach we estimate the contribution of multielectron resonant states to the radiative capture of low-energy electrons by Au25+ and demonstrate that this mechanism fully accounts for the 102 times enhancement of the recombination over the direct radiative recombination, in agreement with recent experimental observations. 
ER  -

