Affiliation: | 1. Physics Department, National Technical University, 157 80, Athens, Greece 2. Department of Physics, University of Athens, 157 84, Zografou, Athens, Greece 3. Institute of Physics, Polish Academy of Sciences, 02-668, Warsaw, Poland 4. Frank Laboratory of Neutron Physics, JINR, 141 980, Dubna, Russia 5. Institute of Physics, Technical University of Szczecin, 71-065, Szczecin, Poland 6. Institute of Chemistry, Technical University of Szczecin, 71-065, Szczecin, Poland
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