Emission probability measurement of γ- and X- rays in Ra-226 and Pb-210 decay

Monika Mazanova; Pavel Dryak; Miroslav Havelka

doi:10.1016/j.apradiso.2017.10.023

Emission probability measurement of γ- and X- rays in Ra-226 and Pb-210 decay

Appl Radiat Isot. 2018 Apr:134:429-432. doi: 10.1016/j.apradiso.2017.10.023. Epub 2017 Oct 13.

Authors

Monika Mazanova¹, Pavel Dryak², Miroslav Havelka³

Affiliations

¹ OI Prague, Czech Metrology Institute, Radiova 1a, CZ-102 00 Prague 10, Czech Republic. Electronic address: mmazanova@cmi.cz.
² OI Prague, Czech Metrology Institute, Radiova 1a, CZ-102 00 Prague 10, Czech Republic. Electronic address: pdryak@cmi.cz.
³ OI Prague, Czech Metrology Institute, Radiova 1a, CZ-102 00 Prague 10, Czech Republic. Electronic address: mhavelka@cmi.cz.

PMID: 29055658
DOI: 10.1016/j.apradiso.2017.10.023

Abstract

The emission intensities of 186.21keV, 46.54keV, XL(Bi) and XK(Rn) photons were measured with calibrated HPGe detectors. The efficiency was computed with the MCNP Monte Carlo code and validated using experimental points. Sources of Ra-226 were prepared from two different radioactive materials. The X-ray emission intensities in Ra-226 decay were determined without X-rays from the daughter decay products using a radon emanation source. The standard CMI source with Pb-210 was used and compared with a source prepared from the NPL solution delivered under the EMRP project "Metrology for processing materials with high natural radioactivity - MetroNORM".

Keywords: Emission probability; HPGe spectrometer; Pb-210 decay; Ra-226 decay.