Nonerasing dose readout in lithium fluoride crystals by positron lifetime spectroscopy.
The measurement of the mean lifetime of the positron (tau) in a lithium fluoride (LiF) chip which had been irradiated with up to 40 Gy from a 60Co gamma-ray source demonstrates a correlation between the positron mean lifetime and the dose which has been delivered to the crystal. This result points out the possibility of performing the readout of gamma-irradiated LiF thermoluminescent dosimeters by positron lifetime spectroscopy without changing the information stored in the chip significantly.
Somoza
A
A
IFIMAT, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Argentina.
Dupasquier
A
A
Chesta
M A
MA
Brunetto
M
M
Mainardi
R T
RT
D004583:Electrons; D005459:Fluorides; D005720:Gamma Rays; D018020:Lithium Compounds; D011874:Radiometry / Q000295:instrumentation*; D013057:Spectrum Analysis / Q000379:methods*
D018020:Lithium Compounds; C027651:lithium fluoride; D005459:Fluorides