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Fading in Thermoluminescent Lithium Fluoride used for Radiation Dosimetry

Naturevolume 207pages997998 (1965) | Download Citation



LITHIUM fluoride powder is now being used extensively for thermoluminescent dosimetry of ionizing radiations because of its good tissue-equivalence with respect to photon energy, and its reported absence of fading1–3. We have found hitherto unreported changes of response with time, predominantly manifested by fading of the read-out by some 10–20 per cent at 3 weeks after irradiation, followed by a tendency to increase towards the initial value at 6–8 weeks. This fading can cause difficulties in practical use unless care is taken to read-out specimens at the same time after irradiation. The fading reported here is other than any occurring in the first 24 h.

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    Karzmark, C. J., White, J., and Fowler, J. F., Phys. Med. Biol., 9, 273 (1964).

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    Cameron, J. R., Zimmerman, D., Kenney, G., Buck, R., Bland, R., and Grant, R., Health Phys., 10, 25 (1964).

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    Marrone, M. J., and Attix, F. H., Health Physics, 10, 431 (1964).

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    Lippert, J., and Mejdahl, V., Intern. Conf. on Luminescence Dosimetry, Stanford, June 1965 (Proc. to be published by U.S. Atomic Energy Comm.).

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    Boone, M. L. M., Crosby, E. H., and Shalek, R. J., Radiology, 84, 817 (1965).

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  1. Department of Medical Physics, Hammersmith Hospital, London, W.12.

    • J. F. FOWLER
  2. Department of Physics, Medical School, Rijeka, Yugoslavia

  3. Department of Physics, St. Bartholomew's Hospital Medical School, London, E.C.1.

    • J. T. WHITE
  4. Department of Radiology, Stanford Medical Center, Palo Alto, California

    • C. J. KARZMARK


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