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Martin-Luther-Universität
Interdisziplinäres Zentrum für Materialwissenschaften
Nanotechnikum Weinberg
Heinrich-Damerow-Str. 4, D-06120 Halle, Germany
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Reinhard Krause-Rehberg, Wolfgang Anwand, Gerhard Brauer, Maik Butterling, Tom Cowan, Andreas Hartmann, Marco Jungmann, Arnold Krille, Ronald Schwengner, Andreas Wagner
Progress of the EPOS project: Gamma-induced Positron Spectroscopy (GiPS)
phys. stat. sol. (c) 6 (11) (2009), 2451-2455
Gamma-induced positron generation has been performed using the superconducting electron accelerator ELBE at the Research Centre Dresden-Rossendorf (Germany). It has an intense, pulsed (26 MHz) gamma source (bremsstrahlung). This source has been used to accomplish positron annihilation spectroscopy for different materials (Fe, silica, water). Since the gamma bunches are very short (<5 ps) the facility is suitable for positron lifetime spectroscopy using the accelerator bunching pulse for timing. The application of coincident measurements (AMOC, CDBS) reduces sufficiently the background of scattered gammas to obtain high-quality spectra.
Keywords: positron annihilation, beam, instrumentration, lifetime
© Wiley-VCH 2009
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