Stable Color Centers Induced in Pure and Neodymium Doped Ca0.28Ba0.72Nb2O6 Crystals by Gamma Irradiation

P. Poteraa, Ya. Zhydachevskiib,c and T. Lukasiewicz d aFaculty of Mathematics and Natural Sciences, Rzeszów University, S. Pigonia 1, 35-310 Rzeszów, Poland bLviv Polytechnic National University, Bandery 12, 79013 Lviv, Ukraine cInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland dInstitute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

Received: September 11, 2014; In final form: December 22, 2014

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The work is devoted to investigation of stable coloration induced by gamma radiation from 60Co (1.25 MeV) in pure and neodymium doped Ca0.28Ba0.72Nb2O6 single crystals. Nature of the induced absorption is discussed. This absorption is due to charge change of native defects or ions forming of crystals (vacancy, niobium ions, etc.). The nature of color centers responsible for induced absorption is discussed.

DOI: 10.12693/APhysPolA.127.753 PACS numbers: 61.80.Ed, 61.72.jn, 42.70.Nq