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Radiat Res. 1998 Mar;149(3):219-23.

Nonerasing dose readout in lithium fluoride crystals by positron lifetime spectroscopy.

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  • 1IFIMAT, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Argentina.


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.

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