title: Instrument performance of a radon measuring system with the alpha-track detection technique.
abstract: An instrument performance test has been carried out for a radon measuring system made in Hungary. The system measures radon using the alpha-track detection technique. It consists of three parts: the passive detector, the etching unit and the evaluation unit. A CR-39 detector is used as the radiation detector. Alpha-track reading and data analysis are carried out after chemical etching. The following subjects were examined in the present study: (1) radon sensitivity, (2) performance of etching and evaluation processes and (3) thoron sensitivity. The radon sensitivity of 6.9 x 10(-4) mm(-2) (Bq m(-3) d)(-1) was acceptable for practical application. The thoron sensitivity was estimated to be as low as 3.3 x 10(-5) mm(-2) (Bq m(-3) d)(-1) from the experimental study.
authors.affiliation: Research Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan. tokonami@nirs.go.jp
authors.forename: S
authors.initials: S
authors.lastname: Tokonami
authors.forename: W
authors.initials: W
authors.lastname: Zhuo
authors.forename: H
authors.initials: H
authors.lastname: Ryuo
authors.forename: H
authors.initials: H
authors.lastname: Yonehara
authors.forename: Y
authors.initials: Y
authors.lastname: Yamada
authors.forename: M
authors.initials: M
authors.lastname: Shimo
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D002138:Calibration; D011092:Polyethylene Glycols / Q000528:radiation effects; D011834:Radiation Monitoring / Q000295:instrumentation*; D011886:Radon / Q000032:analysis*; D012680:Sensitivity and Specificity
chemical_list: D000396:Air Pollutants, Radioactive; C028827:CR 39; D011092:Polyethylene Glycols; D011886:Radon