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  • Title: Decay data measurements on 213Bi using recoil atoms.
    Author: Marouli M, Suliman G, Pommé S, Ammel RV, Jobbágy V, Stroh H, Dikmen H, Paepen J, Dirican A, Bruchertseifer F, Apostolidis C, Morgenstern A.
    Journal: Appl Radiat Isot; 2013 Apr; 74():123-7. PubMed ID: 23416406.
    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.
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