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Number of results
2008 | 113 | 5 | 1339-1346
Article title

New Experimental Approach to the Detection of Positron Annihilation in Flight Process

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EN
Abstracts
EN
Positron annihilation in flight, when mainly positron contributes to the energy and momentum of the annihilating pair, is rarely observed in condensed matter due to its small probability. Additionally, this process does not manifest itself by any characteristic features, which would help in observation. Hence, our knowledge about that process is poor. In the paper we propose the new experimental method which allows us to detect this process. We applied the conventional positron lifetime spectrometer, which after changing photon energy ranges and layout of detectors was suitable for that detection. The first measurements allow us to estimate that in pure aluminum almost 4.76% of all implanted positrons from isotope source ^{22}Na annihilate in flight.
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Contributors
author
  • Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Kraków, Poland
  • Institute of Physics, University of Zielona Góra, Prof. Szafrana 4a, 65-516 Zielona Góra, Poland
References
  • 1. P.A.M. Dirac, Proc. Cambridge Philos. Soc. 26, 361 (1930)
  • 2. R. Krause-Rehberg, H.S. Leipner, Positron Annihilation in Semiconductors: Defect Studies, Springer, Berlin 1998
  • 3. J. Dryzek, in: Proc. 33th PSPA, Turawa (Poland) 2001, Ed. K. Jerie, Institute of Physics, University of Opole, Institute of Experimental Physics, University of Wrocław, Opole 2001, p. 33
  • 4. M.Z. Akrawy et al., Phys. Lett B 257, 531 (1991)
  • 5. M.H. Weber, A.W. Hunt, J.A. Golovchenko, K.G. Lynn, Phys. Rev. Lett. 83, 4658 (1999)
  • 6. J. Dryzek, D. Singleton, T. Suzuki, R. Yu, Am. J. Phys. 74, 49 (2006)
  • 7. J. Dryzek, D. Singleton, Am. J. Phys. 75 713, (2007)
  • 8. B.T. Wright, Phys. Rev. 90, 159 (1953)
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n510kz
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