Decay data measurements on 213Bi using recoil atoms

In this work, 213Bi has bee nseparated from a nopen 225Ac 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-2pi geometry. From these measurements, a new half-life value of T1/2(213Bi)=45.62 (6) min was derived.Additionally, high-resolution alpha-spectrometry measurements were performed at a solid angle of 0.4% of 4pi sr, to verify the energies and emission probabilities of the alpha-emissions from 213Bi. Using 225Ac, 221Fr, 217At and 213Po peaks as reference peaks, the measured 213Bi alpha-peak energies at Ealpha,0=5878 (4) keV and Ealpha,1=5560 (4) keV were about 10 keV higher than validated data. The relative alpha-particle emission probabilities of 213Bi, Palpha,0=0.9155 (11) and Palpha,1=0.0845 (11), and the 213Bi alpha branching factor, Palpha=1-Pbeta=2.140 (10)%, are compatible with recommended values, but have a higher accuracy.

MAROULI Maria;  SULIMAN Gabriel;  POMME Stefaan;  VAN AMMEL Raf;  JOBBAGY Viktor;  STROH Heiko;  DIKMEN H.;  PAEPEN Jan;  DIRICAN A.;  BRUCHERTSEIFER Frank;  APOSTOLIDIS Christos;  MORGENSTERN Alfred; 

2013-05-14

PERGAMON-ELSEVIER SCIENCE LTD

JRC76578

0969-8043,   

http://www.sciencedirect.com/science/article/pii/S0969804312005866,    https://publications.jrc.ec.europa.eu/repository/handle/JRC76578,   

10.1016/j.apradiso.2012.12.005,