EPJ Web Conf.
Volume 132, 2017XXV-th Congress on Spectroscopy
|Number of page(s)||2|
|Published online||13 December 2016|
Positron annihilation spectroscopy on a beam of positrons the LEPTA facility
1 Joint Institute for Nuclear Research, 141980 Dubna, Russia
2 M.V. Lomonosov Northern (Arctic) Federal University, 163002 Arkhangelsk, Russia
3 Institute of Electrophysics and Radiation Technologies NAS of Ukraine, 61002 Kharkov, Ukraine
4 Saint Petersburg State University, 199034 St. Petersburg, Russia
5 Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Krakow, Poland
* Corresponding author: firstname.lastname@example.org
Published online: 13 December 2016
The results and possibilities of the samples surfaces research by the Doppler method of positron annihilation spectroscopy (PAS) for a monochromatic beam of positrons at the LEPTA facility are presented in this paper. Method with high-resolution sensitivity to defects like vacancies and dislocations allows scanning of the surface and near-surface sample layers to a depth of several micrometers by the method of Doppler broadening of annihilation lines. The opportunities for the development of a PAS method based on the measurement of the positron lifetime in the sample irradiated by ordered flow of positrons from the injector of accelerator complex LEPTA at JINR are discussed.
© The Authors, published by EDP Sciences, 2017
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