Decay data measurements on 213Bi using recoil atoms

M Marouli; G Suliman; S Pommé; R Van Ammel; V Jobbágy; H Stroh; H Dikmen; J Paepen; A Dirican; F Bruchertseifer; C Apostolidis; A Morgenstern

doi:10.1016/j.apradiso.2012.12.005

Decay data measurements on 213Bi using recoil atoms

Appl Radiat Isot. 2013 Apr:74:123-7. doi: 10.1016/j.apradiso.2012.12.005. Epub 2013 Jan 4.

Authors

M Marouli¹, G Suliman, S Pommé, R Van Ammel, V Jobbágy, H Stroh, H Dikmen, J Paepen, A Dirican, F Bruchertseifer, C Apostolidis, A Morgenstern

Affiliation

¹ European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium.

PMID: 23416406
DOI: 10.1016/j.apradiso.2012.12.005

Abstract

In this work, (213)Bi has been separated from an open (225)Ac source by collecting recoil atoms onto a glass plate in vacuum. The activity of such recoil sources has been measured as a function of time, using an ion-implanted planar Si detector in quasi-2π geometry. From these measurements, a new half-life value of T1/2((213)Bi)=45.62 (6)min was derived. Additionally, high-resolution alpha-spectrometry measurements were performed at a solid angle of 0.4% of 4πsr, to verify the energies and emission probabilities of the α-emissions from (213)Bi. Using (225)Ac, (221)Fr, (217)At and (213)Po peaks as reference peaks, the measured (213)Bi α-peak energies at Eα,0=5878 (4)keV and Eα,1=5560 (4)keV were about 10keV higher than validated data. The relative α-particle emission probabilities of (213)Bi, Pα,0=0.9155 (11) and Pα,1=0.0845 (11), and the (213)Bi alpha branching factor, Pα=1-Pβ=2.140 (10)%, are compatible with recommended values, but have a higher accuracy.