A. Schrimpf et al., THERMALLY STIMULATED LUMINESCENCE AND CONDUCTIVITY OF DOPED AR SOLIDS, Journal of physics. Condensed matter, 8(20), 1996, pp. 3677-3689
Solid Ar samples doped with the noble metal atoms Au or Ag as well as
with O-2 molecules have been exposed to synchrotron and x-ray irradiat
ion. Impurity trapping of excitons generated by the irradiation partly
led to an ionization; the impurities formed deep traps for one type o
f charge carrier, the complementary ones were promoted into band state
s and subsequently captured into shallow traps. These charge carriers
could be thermally released giving rise to thermally stimulated lumine
scence (TSL) and conductivity (TSC) signals, which were recorded simul
taneously. The glow curves of both, TSL and TSC, clearly revealed the
existence of intrinsic and extrinsic electron traps. Using a step-like
temperature increase it could be demonstrated that traps exist with a
broad distribution of binding energies. A first-order kinetics model
was developed to extract binding energies from the temperature depende
nce of the thermally stimulated luminescence.