  To benchmark a Monte Carlo model of the Auger cascade that has been developed
at the Australian National University (ANU) against the literature data. The
model is applicable to any Auger-electron emitting radionuclide with nuclear
structure data in the format of the Evaluated Nuclear Structure Data File
(ENSDF). Sch\"onfeld's algorithms and the BrIcc code were incorporated to
obtain initial vacancy distributions due to electron capture (EC) and internal
conversion (IC), respectively. Atomic transition probabilities were adopted
from the Evaluated Atomic Data Library (EADL) for elements with atomic number,
Z = 1-100. Atomic transition energies were evaluated using a relativistic
Dirac-Fock method. An energy-restriction protocol was implemented to eliminate
energetically forbidden transitions from the simulations. Calculated initial
vacancy distributions and average energy spectra of 123I, 124I and 125I were
compared with the literature data. In addition, simulated kinetic energy
spectra and frequency distributions of the number of emitted electrons and
photons of the three iodine radionuclides are presented. Some examples of
radiation spectra of individual decays are also given. Good agreement with the
published data was achieved except for the outer-shell Auger and Coster-Kronig
transitions. Nevertheless, the model needs to be compared with experimental
data in a future study.
