Annihilation Lifetime Spectroscopy using Positrons from Bremsstrahlung Production
Annihilation Lifetime Spectroscopy using Positrons from Bremsstrahlung Production
Wagner, A.; Anwand, W.; Butterling, M.; Cowan, T. E.; Fiedler, F.; Kempe, M.; Krause-Rehberg, R.
Abstract
A new type of a positron annihilation lifetime spectroscopy (PALS) system has been set up at the superconducting electron accelerator ELBE [1] at Helmholtz-Zentrum Dresden-Rossendorf. In contrast to existing source-based PALS systems, the approach described here makes use of an intense photon beam from electron bremsstrahlung which converts through pair production into positrons inside the sample under study. The article focusses on the production of intense bremsstrahlung using a superconducting electron linear accelerator, the production of positrons inside the sample under study, the efficient detector setup which allows for annihilation lifetime and Doppler-broadening spectroscopy simultaneously. Selected examples of positron annihilation spectroscopy are presented.
Keywords: pulsed positron source; positron annihilation lifetime spectroscopy; age-momentum correlation; bulk sample; fluids; gases; biological samples; bremsstrahlung; superconducting LINAC
Beteiligte Forschungsanlagen
- Strahlungsquelle ELBE DOI: 10.17815/jlsrf-2-58
- P-ELBE
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 17489) publication
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Buchkapitel
B.N. Ganguly, G. Brauer:: Near Surface Depth Profiling of Solids by Mono-energetic Positrons, Zurich, Switzerland: TransTech Publications Ltd, 2012, 978-3-03785-524-9, 41-52
DOI: 10.4028/www.scientific.net/DDF.331.41
Cited 4 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-17489