Chemical sensitivity in positron annihilation with just one single Ge detector
We present a novel method for analyzing the data from momentum distribution measurements employing positron annihilation, using just one single Ge‐detector, but employing a mathematically sufficiently well suited model for background subtraction. For a variety of high purity metals the resulting mom...
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| Veröffentlicht in: | Physica status solidi. A, Applications and materials science Applications and materials science, 2005-03, Vol.202 (4), p.R38-R40 |
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| container_issue | 4 |
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| container_title | Physica status solidi. A, Applications and materials science |
| container_volume | 202 |
| creator | Haaks, Matz Staab, Torsten E. M. Saarinen, Kimmo Maier, Karl |
| description | We present a novel method for analyzing the data from momentum distribution measurements employing positron annihilation, using just one single Ge‐detector, but employing a mathematically sufficiently well suited model for background subtraction. For a variety of high purity metals the resulting momentum distributions have exactly the same shapes up to 35 × 10–3 m0c as those obtained with coincidence Doppler broadening of the annihilation radiation using a two‐detector system. This data analysis applies to any positron source without high energy gammas or a slow positron beam system with just a single Ge‐detector and enables the possibility of analysing the chemical surrounding at the positron trapping site without any additional hardware. In particular, in combination with a slow positron microbeam, it allows a spatially resolved measurement of the electron's momentum distribution. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| doi_str_mv | 10.1002/pssa.200510004 |
| format | Article |
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A, Applications and materials science</jtitle><addtitle>phys. stat. sol. (a)</addtitle><date>2005-03</date><risdate>2005</risdate><volume>202</volume><issue>4</issue><spage>R38</spage><epage>R40</epage><pages>R38-R40</pages><issn>1862-6300</issn><issn>0031-8965</issn><eissn>1862-6319</eissn><eissn>1521-396X</eissn><coden>PSSABA</coden><abstract>We present a novel method for analyzing the data from momentum distribution measurements employing positron annihilation, using just one single Ge‐detector, but employing a mathematically sufficiently well suited model for background subtraction. For a variety of high purity metals the resulting momentum distributions have exactly the same shapes up to 35 × 10–3 m0c as those obtained with coincidence Doppler broadening of the annihilation radiation using a two‐detector system. 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| subjects | 02.60.Ed 07.05.Kf 71.60.+z 78.70.Bj Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Other interactions of matter with particles and radiation Physics Positron annihilation |
| title | Chemical sensitivity in positron annihilation with just one single Ge detector |
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