Siemens Gammasonics, Inc.

Robert W Pollock

Douglas Patton

John Goodin

David Sharbaugh

Daniel J Godlewski

A small scintillation crystal has a surface which is coated with a thin layer of aluminium or cobalt. The aluminium is etched with identification markings, as by a laser.

Identification of scintillation crystals

Dosimeter for monitoring radiation exposure

Film badge for monitoring radiation exposure

A thermoluminescent radiation detector crystal which has been irradiated by ionizing radiation is contacted with an organic solvent at its boiling point prior to read-out of the crystal. The boiling point of the solvent is approximately equal to the optimum post-radiation annealing temperature of the crystal. The solvent thereby simultaneously cleans and anneals the crystal. Preferably, the contacting step is performed by suspending the crystal in vapors of the solvent. The vapor condenses on the crystal and washes away impurities from the surface thereof.

Method for cleaning and annealing a thermoluminescent radiation detector

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Evanston, IL, United States of America

Robert W Pollock