title: Study of ageing and fading in CR-39 detectors for different storage conditions.
abstract: The aim of this study was to investigate the effect of ageing and fading on PADC detector response, as a function of the storage time and temperature. Several groups of CR-39 detectors provided by Radosys, Ltd. were exposed at the reference radon chamber of the Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, at the ENEA centre in Casaccia. The results indicate that low-temperature storage inhibits the effect of both ageing and fading. Finally, the overall reduction in CR-39 sensitivity due to the combined ageing/fading effect was estimated. In particular, the sensitivity of the detectors continuously exposed in air at room temperature over 6 and 3 months was reduced, respectively, by 7.5 and 4 %.
authors.affiliation: Department of Rome, ARPA Lazio, Via Giuseppe Saredo 52, Rome 00100, Italy daniele.franci@arpalazio.it.
authors.forename: Daniele
authors.initials: D
authors.lastname: Franci
authors.affiliation: Department of Rome, ARPA Lazio, Via Giuseppe Saredo 52, Rome 00100, Italy.
authors.forename: Tommaso
authors.initials: T
authors.lastname: Aureli
authors.affiliation: Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti (INMRI), Centro Ricerche, ENEA, Casaccia, Rome 00123, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Cardellini
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D002138:Calibration; D011092:Polyethylene Glycols / Q000737:chemistry*; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods; D011886:Radon / Q000032:analysis*
chemical_list: D000396:Air Pollutants, Radioactive; C028827:CR 39; D011092:Polyethylene Glycols; D011886:Radon