Diffusion lengths and partition coefficients of 131mXe and 85Kr in Makrofol N and Makrofol DE polycarbonates

K Mitev; P Cassette; I Tartès; S Georgiev; I Dimitrova; D Pressyanov

doi:10.1016/j.apradiso.2017.07.023

Diffusion lengths and partition coefficients of ^131mXe and ⁸⁵Kr in Makrofol N and Makrofol DE polycarbonates

Appl Radiat Isot. 2018 Apr:134:269-274. doi: 10.1016/j.apradiso.2017.07.023. Epub 2017 Jul 14.

Authors

K Mitev¹, P Cassette², I Tartès², S Georgiev³, I Dimitrova³, D Pressyanov³

Affiliations

¹ Faculty of Physics, Sofia University "St. Kliment Ohridski", 1164 Sofia, Bulgaria. Electronic address: kmitev@phys.uni-sofia.bg.
² CEA, LIST, Laboratoire National Henri Becquerel, Gif-sur-Yvette, LNE-LNHB, F-91191, France.
³ Faculty of Physics, Sofia University "St. Kliment Ohridski", 1164 Sofia, Bulgaria.

PMID: 28886884
DOI: 10.1016/j.apradiso.2017.07.023

Abstract

This work presents the results of an experimental study of the Makrofol^® N and Makrofol^® DE polycarbonate foils absorption properties of ⁸⁵Kr and ^131mXe. The diffusion lengths of ⁸⁵Kr and ^131mXe in both types of foils are determined. The partition coefficients of ⁸⁵Kr from air and water and that of ^131mXe from air in Makrofol^® N are determined. The partition coefficients of ⁸⁵Kr from water and ^131mXe from air in Makrofol^® DE are also determined. The parameters are determined for T = 22°C and allow for the full characterization of sorption and desorption of ⁸⁵Kr and ^131mXe in the foils at this temperature. The results from this study highlight the remarkable absorption ability of Makrofol^® and especially of the Makrofol^® N foil and show that it surpasses the Makrofol DE^® foil not only as a Rn absorber, but also as Kr and Xe absorber.

Keywords: (131m)Xe; (85)Kr; Diffusion; LSC; Polycarbonate.