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

• Authors: J. Dryzek
• Languages of publication: 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.

Keywords

EN

78.70.Bj; 07.85.-m

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 07.85.-m: X- and γ-ray instruments(for x- and γ-ray telescopes, see 95.55.Ka in astronomy; for x-ray beams and x-ray optics, see 41.50.+h)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 5
• Pages: 1339-1346

Dates

published

2008-05

received

2007-09-03

Contributors

author

J. Dryzek

• 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

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• 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
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• 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)

Identifiers

DOI

10.12693/APhysPolA.113.1339