title: The German thoron progeny chamber--concept and application.
abstract: Following completion of the project "Generation and characterisation of reference atmospheres of thoron decay products for the calibration of measuring devices for thoron decay products", the Physikalisch-Technische Bundesanstalt (PTB) now operates a thoron progeny chamber in which (220)Rn (thoron), (222)Rn and its progenies can be made available under almost all ambient conditions. This allows all measuring systems to be calibrated under realistic climatic conditions with an accuracy unique worldwide.
authors.affiliation: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116 Braunschweig, Germany. Annette.roettger@ptb.de
authors.forename: Annette
authors.initials: A
authors.lastname: Röttger
authors.forename: Anja
authors.initials: A
authors.lastname: Honig
authors.forename: Dirk
authors.initials: D
authors.lastname: Arnold
mesh_terms: D000388:Air; D002138:Calibration; D005858:Germany; D011834:Radiation Monitoring; D011886:Radon / Q000032:analysis*
chemical_list: D011886:Radon