Standardization of krypton-85 and its calibration on HPGe gamma-ray spectrometer

Zilu Wang; Ming Zhang; Fei Tuo; Zhenzhen Zhang; Juncheng Liang

doi:10.1016/j.apradiso.2020.109342

Standardization of krypton-85 and its calibration on HPGe gamma-ray spectrometer

Appl Radiat Isot. 2020 Dec:166:109342. doi: 10.1016/j.apradiso.2020.109342. Epub 2020 Jul 24.

Authors

Zilu Wang¹, Ming Zhang², Fei Tuo³, Zhenzhen Zhang⁴, Juncheng Liang⁴

Affiliations

¹ National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China; National Institute of Metrology, Beijing, 100029, China.
² National Institute of Metrology, Beijing, 100029, China. Electronic address: zhming@nim.ac.cn.
³ National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China. Electronic address: flytuo@163.com.
⁴ National Institute of Metrology, Beijing, 100029, China.

PMID: 32758708
DOI: 10.1016/j.apradiso.2020.109342

Abstract

In this paper, standardization of the activity concentration of gaseous beta-emitting radionuclide ⁸⁵Kr is introduced. The measurement was performed at the recent-established primary standard at the National Institute of Metrology of China (NIM), which consists of a set of internal gas proportional counters of different length. Samples suitable for High Purity Germanium gamma-ray spectrometry measurement were also prepared, and efficiency calibration at an energy of E_γ = 514 keV with standardized ⁸⁵Kr source in a given geometrical container is presented.

Keywords: Absolute measurement of (85)Kr; Efficiency calibration; Noble gas; Radioactivity concentration.