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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/25400
Title: A new value for the half-life of 10Be by Heavy-Ion Elastic Recoil Detection and liquid scintillation counting
Authors: Korschinek G.
Bergmaier A.
Faestermann T.
Gerstmann U.C.
Knie K.
Rugel G.
Wallner A.
Dillmann I.
Dollinger G.
von Gostomski Ch.L.
Kossert K.
Maiti, Moumita
Poutivtsev M.
Remmert A.
Published in: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Abstract: The importance of 10Be in different applications of accelerator mass spectrometry (AMS) is well-known. In this context the half-life of 10Be has a crucial impact, and an accurate and precise determination of the half-life is a prerequisite for many of the applications of 10Be in cosmic-ray and earth science research. Recently, the value of the 10Be half-life has been the centre of much debate. In order to overcome uncertainties inherent in previous determinations, we introduced a new method of high accuracy and precision. An aliquot of our highly enriched 10Be master solution was serially diluted with increasing well-known masses of 9Be. We then determined the initial 10Be concentration by least square fit to the series of measurements of the resultant 10Be/9Be ratio. In order to minimize uncertainties because of mass bias which plague other low-energy mass spectrometric methods, we used for the first time Heavy-Ion Elastic Recoil Detection (HI-ERD) for the determination of the 10Be/9Be isotopic ratios, a technique which does not suffer from difficult to control mass fractionation. The specific activity of the master solution was measured by means of accurate liquid scintillation counting (LSC). The resultant combination of the 10Be concentration and activity yields a 10Be half-life of T1/2 = 1.388 ± 0.018 (1 s, 1.30%) Ma. In a parallel but independent study (Chmeleff et al. [11]), found a value of 1.386 ± 0.016 (1.15%) Ma. Our recommended weighted mean and mean standard error for the new value for 10Be half-life based on these two independent measurements is 1.387 ± 0.012 (0.87%) Ma. © 2009 Elsevier B.V. All rights reserved.
Citation: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 268(2): 187-191
URI: https://doi.org/10.1016/j.nimb.2009.09.020
http://repository.iitr.ac.in/handle/123456789/25400
Issue Date: 2010
Keywords: Accelerator mass spectrometry (AMS)
Half-life of 10Be
Heavy-Ion Elastic Recoil Detection
Liquid scintillation counting (LSC)
ISSN: 0168583X
Author Scopus IDs: 7004262575
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Author Affiliations: Korschinek, G., Physik Department, Technische Universität München, D-85748 Garching, Germany
Bergmaier, A., Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, Institut für Angewandte Physik und Messtechnik LRT2, Werner-Heisenberg-Weg 39, D-85577 Neubiberg, Germany
Faestermann, T., Physik Department, Technische Universität München, D-85748 Garching, Germany
Gerstmann, U.C., Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Radiation Protection, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
Knie, K., Physik Department, Technische Universität München, D-85748 Garching, Germany
Rugel, G., Physik Department, Technische Universität München, D-85748 Garching, Germany
Wallner, A., VERA Laboratory, Faculty of Physics, University of Vienna, Waehringer Strasse 17, A-1090 Wien, Austria
Dillmann, I., Physik Department, Technische Universität München, D-85748 Garching, Germany
Dollinger, G., Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, Institut für Angewandte Physik und Messtechnik LRT2, Werner-Heisenberg-Weg 39, D-85577 Neubiberg, Germany
von Gostomski, Ch.L., Technische Universität München, D-85748 Garching, Germany
Kossert, K., Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
Maiti, M., Physik Department, Technische Universität München, D-85748 Garching, Germany
Poutivtsev, M., Physik Department, Technische Universität München, D-85748 Garching, Germany
Remmert, A., Technische Universität München, D-85748 Garching, Germany
Funding Details: This work was supported by the EU Marie Curie Network CRONUS-EU and by the DFG Cluster of Excellence “Origin and Structure of the Universe”. We want to acknowledge T. Dunai for his efforts to conduct CRONUS-EU. We appreciate the valuable and detailed comments of D. Fink, the referee, which improved the quality of this publication significantly. European Commission, EC
Corresponding Author: Korschinek, G.; Physik Department, , D-85748 Garching, Germany; email: Gunther.Korschinek@ph.tum.de
Appears in Collections:Journal Publications [PH]

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