The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Siemek, K. AU - Ahmanova, E.V. AU - Eseev, M.K. AU - Hilinov, V.I. AU - Horodek, P. AU - Kobets, A.G. AU - Meshkov, I.N. AU - Orlov, O. AU - Sidorin, A.A. ED - Kuzin, Maxim ED - Schaa, Volker RW TI - Realization of Positron Annihilation Spectroscopy at LEPTA Facility J2 - Proc. of RuPAC2016, St. Petersburg, Russia, November 21-25, 2016 C1 - St. Petersburg, Russia T2 - Russian Particle Accelerator Conference T3 - 25 LA - english AB - Positrons are used in materials science to study open volume defects. Several positron annihilation spectroscopy (PAS) techniques exist. These methods are based on detection of the 511 keV gamma quantum. The first method is the analysis of the Doppler broadening of annihilation line and provide information about defect concentration. Both annihilation quanta can be observed. Coincidence observation of two quanta gives additional information about the environment around defect. The second method is based on lifetime concept, which allows to distinguish type of defects. Nowadays, positron beams are of great interest for materials science. Using a low energy, monoenergetic beam it is possible to control the positron penetration depth from the sample surface to a depth of several microns. Thus, the beam can be used to characterize thin films, analysis of surface modification, studying influence of ions on matter etc. This report aims to present a current status of realization and progress in PAS methods at LEPTA facility at JINR. PB - JACoW CP - Geneva, Switzerland SP - 496 EP - 498 KW - positron KW - electron KW - detector KW - ion KW - radiation DA - 2017/02 PY - 2017 SN - 978-3-95450-181-6 DO - 10.18429/JACoW-RuPAC2016-WEPSB059 UR - http://jacow.org/rupac2016/papers/wepsb059.pdf ER -