Production and characterization of a 222Rn-emanating stainless steel source

Florian Jörg; Guillaume Eurin; Hardy Simgen

doi:10.1016/j.apradiso.2023.110666

Production and characterization of a ²²²Rn-emanating stainless steel source

Appl Radiat Isot. 2023 Apr:194:110666. doi: 10.1016/j.apradiso.2023.110666. Epub 2023 Jan 20.

Authors

Florian Jörg¹, Guillaume Eurin², Hardy Simgen³

Affiliations

¹ Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany. Electronic address: fjoerg@mpi-hd.mpg.de.
² Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France(1).
³ Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.

PMID: 36701881
DOI: 10.1016/j.apradiso.2023.110666

Abstract

Precise radon measurements are a requirement for various applications, ranging from radiation protection over environmental studies to material screening campaigns for rare-event searches. All of them ultimately depend on the availability of calibration sources with a known and stable radon emanation rate. A new approach to produce clean and dry radon sources by implantation of ²²⁶Ra ions into stainless steel has been investigated. In a proof of principle study, two stainless steel plates have been implanted in collaboration with the ISOLDE facility located at CERN. We present results from a complete characterization of the sources. Each sample provides a radon emanation rate of about 2 Bq, which has been measured using electrostatic radon monitors as well as miniaturized proportional counters. Additional measurements using HPGe and alpha spectrometry as well as measurements of the radon emanation rate at low temperatures were carried out.

Keywords: Radioactive ion beams; Radon mitigation; Sources of radon emanation.