title: New thermoluminescent dosimeters (TLD): optimization and characterization of TLD threads sterilizable by autoclave.
abstract: To improve the performance of mono-extruded TLD threads as a dosimetric thermoluminescent tool (French Patent 9903729), a new process was developed by co-extrusion methodology leading to threads of 600 microm diameter with a 50 microm homogeneous polypropylene sheath. In this optimization work, study of parameters such as LiF:Mg,Cu,P powder granulometry, load rate and proportion of components led to an increased sensitivity of around 40%. Moreover, the co-extrusion technique allowed the threads to be sterilized by humid steam (134 degrees C/18 min) without significant variation of the linearity response between 0 and 30 Gy after gamma irradiation (60Co).
authors.affiliation: Inserm ERIT-M 0104, 10 rue A. Boquel, 49100 Angers, France.
authors.forename: D
authors.initials: D
authors.lastname: Jarnet
authors.forename: B
authors.initials: B
authors.lastname: Denizot
authors.forename: F
authors.initials: F
authors.lastname: Hindré
authors.forename: M C
authors.initials: MC
authors.lastname: Venier-Julienne
authors.forename: A
authors.initials: A
authors.lastname: Lisbona
authors.forename: M
authors.initials: M
authors.lastname: Bardiès
authors.forename: P
authors.initials: P
authors.lastname: Jallet
mesh_terms: D002138:Calibration; D003300:Copper; D004305:Dose-Response Relationship, Drug; D005720:Gamma Rays; D008274:Magnesium; D008420:Manufactured Materials / Q000032:analysis*; D018613:Microscopy, Confocal; D010316:Particle Size; D010758:Phosphorus; D017785:Photons; D011126:Polypropylenes; D011208:Powders; D013242:Sterilization; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation / Q000379:methods*
chemical_list: D011126:Polypropylenes; D011208:Powders; D010758:Phosphorus; D003300:Copper; D008274:Magnesium