Abstract
The Low Energy Positron Toroidal Accumulator (LEPTA) at JINR proposed for generation of positronium in flight can be used for Positron Anihilation Spectroscopy (PAS). This is the sensitive method for microstructure studies of solid body. The structural defects such as vacancies, vacancy clusters and nanovoids with the size 0.1–10 nm can be detected. In this paper the progress in the development of PAS at LEPTA facility will be presented. The description of Doppler broadening of annihilation gamma line technique and the examples of results obtained on slow positron beam will be shown.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
W. Brandt and A. Dupasquier, in Proceedings of Internat. School of Physics Enrico Fermi “Positrons Solid-State Physics,” Course LXXXIII, Varenna 1981 (Amsterdam, 1983).
A. Dupasquier and Jr. A. P. Mills, in Proceedings of Internat. School of Physics Enrico Fermi “Positron Spectroscopy of Solids,” Course CXXV, Varenna, 1993 (Amsterdam, 1995).
W. E. Frieze, K. G. Lynn, and D. O. Welch, “Positron trapping model including spatial diffusion of the positron,” Phys. Rev. B 31, 15–19 (1985).
P. Horodek, A. G. Kobets, I. N. Meshkov, V. Pavlov, A. Yu. Rudakov, A. A. Sidorin, and S. L. Yakovenko, in Proceedings of RUPAC2012 “Positron Annihilation Spectroscopy at LEPTA Facility,” http://accelconf.web.cern.ch/AccelConf/rupac2012/papers/weppc044.pdf.
E. V. Akhmanova, M. K. Eseev, A. G. Kobets, I.N. Meshkov, A. Yu. Rudakov, A. A. Sidorin, and S. L. Yakovenko, “LEPTA project: formation and injection of positron beam,” Phys. Part. Nucl. Lett. 9, 373–376 (2012).
J. Dryzek, E. Dryzek, F. Börner, and R. Krause-Rehberg, “Subsurface zones created under lubrication conditions studied by positron annihilation,” Tribol. Lett. 11, 29–36 (2001).
A. Van Veen, H. Schut, and M. Clement, “VEPFIT applied to depth profiling problems,” Appl. Surf. Sci. 85, 216–224 (1995).
G. C. Aers, K. O. Jensen, and A. B. Walker, “Slow positron beam techniques for solids and surfaces,” in AIP Conf. Proc. 303 (AIP Press, New York, 1994), p. 13.
D. T. Britton, P. A. Huttunen, J. Mäkinen, E. Soininen, and A. Vehanen, “Positron reflection from the surface potential,” Phys. Rev. Lett. Lett. 62, 2413–2413 (1989).
D. Lindell and R. Pettersson, “Pickling of process-oxidised austenitic stainless steels i HnNO3-HF mixed acid,” Steel Research Int. 81(7), 542–551 (2010).
J. Dryzek and P. Horodek, “GEANT4 simulation of slow positron beam implantation profiles,” Nuclear Instruments and Methods in Phys. Res B 266 (2008).
Y. C. Wu, Y. Q. Chen, B. Wang, S. J. Wang, Y. C. Jean, R. Suzuki, and T. Ohdaira, “Slow positron beam study of corrosion-related defects in pure iron,” Appl. Surf. Sci. 252, 3274 (2006).
P. Horodek, J. Dryzek, and M. Wróbel, “Positron annihilation study of defects induced by various cutting methods in stainless steel grade 304,” Tribol. Lett. 45, 341–347 (2012).
A. Vehanen, P. Hautojarvi, J. Johansson, J. P. Yli-Kauppila, and P. Moser, “Vacancies and carbon impuritiesin a-iron: electron irradiation,” Phys. Rev. B 25, 762–780 (1982).
F. Lukáč, J. Čižek, I. Procházka, Y. Jiraskova, D. Janickovic, W. Anwand, and G. Brauer, “Vacancy-induced hardening in Fe-Al alloys,” Journal of Physics: Conference Series 443 012025, 1–4 (2013).
Author information
Authors and Affiliations
Corresponding author
Additional information
The article is published in the original.
Rights and permissions
About this article
Cite this article
Horodek, P., Bugdol, M., Kobets, A.G. et al. Development of positron annihilation spectroscopy at LEPTA facility. Phys. Part. Nuclei Lett. 11, 708–712 (2014). https://doi.org/10.1134/S1547477114050136
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1547477114050136