Energy response of GR-200A thermoluminescence dosemeters to 60Co and to monoenergetic synchrotron radiation in the energy range 28-40 keV.
The response of LiF:Mg,Cu,P thermoluminescence dosemeters (type GR-200A) to monoenergetic radiation of energy 28, 35, 38 and 40 keV was evaluated with respect to irradiation with a calibrated (60)Co gamma-ray source. High-precision measurements of the relative air kerma response performed at the SYRMEP beamline of the ELETTRA synchrotron radiation facility (Trieste, Italy) showed a significant deviation of the average response to low-energy X-rays from that to (60)Co, with an over-response from 6 % (at 28 keV) to 22 % (at 40 keV). These data are not consistent with literature data for these dosemeters, where model predictions gave deviation from unity of the relative air kerma response of about 10 %. The authors conclude for the need of additional determinations of the low-energy relative response of GR-200A dosemeters, covering a wider range of monoenergetic energies sampled at a fine energy step, as planned in future experiments by their group at the ELETTRA facility.
Dipartimento di Fisica, Università di Napoli Federico II, Via Cintia, Napoli I-80126, Italy INFN, Sezione di Napoli, Via Cintia, Napoli I-80126, Italy.
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Emiro
Dipartimento di Fisica, Università di Napoli Federico II, Via Cintia, Napoli I-80126, Italy INFN, Sezione di Napoli, Via Cintia, Napoli I-80126, Italy.
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Di Lillo
Dipartimento di Fisica, Università di Napoli Federico II, Via Cintia, Napoli I-80126, Italy INFN, Sezione di Napoli, Via Cintia, Napoli I-80126, Italy mettivier@na.infn.it.
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Mettivier
Dipartimento di Fisica, Università di Trieste, Via A. Valerio 2, Trieste I-34127, Italy INFN, Sezione di Trieste, Via A. Valerio 2, Trieste I-34127, Italy.
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Fedon
Dipartimento di Fisica, Università di Trieste, Via A. Valerio 2, Trieste I-34127, Italy INFN, Sezione di Trieste, Via A. Valerio 2, Trieste I-34127, Italy.
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Longo
Sincrotrone Trieste SCpA, Strada Statale S.S. 14 km 163.5, Basovizza, Trieste I-34012, Italy.
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Tromba
Dipartimento di Fisica, Università di Napoli Federico II, Via Cintia, Napoli I-80126, Italy INFN, Sezione di Napoli, Via Cintia, Napoli I-80126, Italy.
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Russo
D000388:Air; D002138:Calibration; D003037:Cobalt Radioisotopes / Q000032:analysis; D003300:Copper / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D005720:Gamma Rays; D018020:Lithium Compounds / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D017785:Photons; D011829:Radiation Dosage; D017356:Synchrotrons; D013819:Thermoluminescent Dosimetry / Q000379:methods*; D014965:X-Rays
D003037:Cobalt Radioisotopes; D018020:Lithium Compounds; C027651:lithium fluoride; D010758:Phosphorus; D003300:Copper; D008274:Magnesium; D005459:Fluorides