The primary system for measurement of beta emitting radioactive gases at KRISS

Y Seon; S H Hwang; J M Lee; K B Lee; D H Heo; M J Han; H J Kim

doi:10.1016/j.apradiso.2020.109238

The primary system for measurement of beta emitting radioactive gases at KRISS

Appl Radiat Isot. 2020 Oct:164:109238. doi: 10.1016/j.apradiso.2020.109238. Epub 2020 Jun 6.

Authors

Y Seon¹, S H Hwang², J M Lee³, K B Lee³, D H Heo⁴, M J Han³, H J Kim⁵

Affiliations

¹ Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; Department of Physics, Kyungpook National University, Daegu, 41566, South Korea.
² Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea. Electronic address: shhwang@kriss.re.kr.
³ Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea.
⁴ Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea.
⁵ Department of Physics, Kyungpook National University, Daegu, 41566, South Korea.

PMID: 32554125
DOI: 10.1016/j.apradiso.2020.109238

Abstract

Korea Research Institute of Standards and Science (KRISS) is developing a length-compensated proportional counting (LCPC) system as a primary system for standardization of beta emitting radioactive gases. The pilot experiment was performed with ⁸⁵Kr and the optimized high voltage and pressure were found to be 1700 V and 0.203 MPa, respectively. The total activity of ⁸⁵Kr was deduced by the length compensation of each count. The expanded uncertainty was estimated to be around 0.8% (k = 2) for the ⁸⁵Kr measurement.

Keywords: (85)Kr gas; Beta emitting radioactive gas; Length-compensated proportional counter; Primary system.