Absolute measurements of gamma-ray emission probabilities of Yb-169

Authors
Iwahara, A Delgado, JU Poledna, R da Silva, CJ Lopes, RT
Citation
A. Iwahara et al., Absolute measurements of gamma-ray emission probabilities of Yb-169, NUCL INST A, 455(3), 2000, pp. 607-611
Citations number
15
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
455
Issue
3
Year of publication
2000
Pages
607 - 611
Database
ISI
SICI code
0168-9002(200012)455:3<607:AMOGEP>2.0.ZU;2-X
Abstract
A solution of Yb-169 was absolutely standardized by the 4 pi beta (PC)-gamm a [NaI(Tl)] coincidence counting method and the result has been used to obt ain direct measurements of gamma-ray emission probabilities with a coaxial HPGe detector. Standard sources covering the energy range from 21 to 1408 k eV were employed to obtain the efficiency-energy curve of the germanium det ector. The efficiencies obtained by interpolating this curve were used to d etermine the emission probabilities of gamma -rays following the decay of Y b-169. The half-life of Yb-169 was also measured with a 4 pi-gamma ionizati on chamber. (C) 2000 Elsevier Science B.V. All rights reserved.