title: New advances in LiF:Mg,Cu,P TLDs (GR-200A).
abstract: In order to volume-produce LiF:Mg,Cu,P TLDs, increase the repeatability of preparation technology and further improve the features of TLDs, especially the moisture resistant property and the accuracy in ultra-low dose, the prescription and preparation techniques have been investigated further in recent years. The main features of GR-200A have been improved dramatically by adding a chemical additive and adopting a particular preparation technology. Recent improvements are presented including prescription, preparation technology, TL sensitivity, signal-to-noise rate, detection threshold, residual signal, the moisture resistant property and the uncertainty in low dose measurements. The sensitivity of GR-200A has been increased to 65 times as high as TLD-100 from the original 29 times. The residual signal has been decreased to less than 1% from the original of about 2.5% following 240 degrees C readout. The detection threshold decreases and the signal-to-noise ratio increases. The uncertainty in low dose measurements is reduced significantly. The resistance to humidity has been improved remarkably. The preparation technology to volume-produce GR-200A is stable.
authors.affiliation: Solid Dosimetric Detector and Method Laboratory, Beijing, PR China. Tang@ChinaDML.COM
authors.forename: W
authors.initials: W
authors.lastname: Shen
authors.forename: K
authors.initials: K
authors.lastname: Tang
authors.forename: H
authors.initials: H
authors.lastname: Zhu
authors.forename: B
authors.initials: B
authors.lastname: Liu
mesh_terms: D003300:Copper / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry / Q000302:isolation & purification / Q000528:radiation effects*; D018020:Lithium Compounds / Q000737:chemistry / Q000302:isolation & purification / Q000528:radiation effects*; D008274:Magnesium / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D011854:Radiochemistry; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000379:methods* / Q000706:statistics & numerical data
chemical_list: D018020:Lithium Compounds; C027651:lithium fluoride; D010758:Phosphorus; D003300:Copper; D008274:Magnesium; D005459:Fluorides