Journal of the Serbian Chemical Society 2000 Volume 65, Issue 10, Pages: 743-754
https://doi.org/10.2298/JSC0010743P
Full text ( 6935 KB)
Lanthanide doped alkaline metal sulphates as candidates for EPR dosimetry
Petković Jelena (Faculty of Physical Chemistry, Belgrade)
Mladenović Ivana (Faculty of Physical Chemistry, Belgrade)
Vukelić Nikola (Faculty of Physical Chemistry, Belgrade)
Mojović Miloš (Faculty of Physical Chemistry, Belgrade)
Bačić Goran (Faculty of Physical Chemistry, Belgrade)
The applicability of lanthanide doped alkaline metal sulphates as a new type
of dosimeters for EPR dosimetery of ionizing radiation has been investigated
in an attempt to obtain a dosimeter with better characteristics than the
commonly used alanine dosimeter. Irradiation of samples doped with
different lanthanides (Y, Ln, Gd) showed that the best sensitivity is
obtained using dosimeters doped with Y2(S04)3. Different procedures for
manufacturing dosimeters were studied and an optimum procedure was
established. The time stability of the EPR signal of the irradiated Y2(S04)3
dosimeter was investigated using a 15N-PDT standard and no fading of the
EPR signal was observed over at least two weeks. The dose dependence of
alanine and Y2(S04)3 doped K3Na(S04)2 dosimeters irradiated in the range 20
Gy - 200 kGy was analysed using a combination of 1-hit and 2-hit mechanisms
of free radicals creation.
Keywords: lanthanide doped K3Na(S04)2, electron paramagnetic resonance, dosimetry