Sc. Sabharwal et al., THERMOLUMINESCENCE AND TRANSMISSION RECOVERY OF GAMMA-IRRADIATED BI4GE3O12 SINGLE-CRYSTAL, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 329(1-2), 1993, pp. 179-182
The changes induced by gamma-ray irradiation in the optical transmissi
on of some undoped and impurity doped BGO crystals are investigated. T
he stoichiometric deviations and the presence of Fe-ions in the crysta
l lattice have been found to affect the thermoluminescent emission and
transmission recovery at room temperature. A good control over the cr
ystal stoichiometry is found necessary to realise crystals of high rad
iation hardness and exhibiting a good transmission recovery. For the s
toichiometric crystals prepared, the observed loss of transmission for
an exposure of 116 Mrad is about 4%.