Title: ON THE EXISTENCE OF A NEW PHASE IN SASD
Author(s): I.E.Lipinski (Institute of Physics, Technical University of Szczecin, 17 Aleja Piastow, 71--310 Szczecin, Poland), J.Kuriata (Institute of Physics, Technical University of Szczecin, 17 Aleja Piastow, 71--310 Szczecin, Poland), N.A.Korynevskii (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine; Institute of Physics, University of Szczecin, 15 Wielkopolska Str., 70--451 Szczecin, Poland)

Neutron irradiation induced paramagnetic centers are investigated using EPR. It is shown that the observed EPR signal appears to be mainly due to a variety of radicals. Temperature dependence of the EPR linewidth is attempted to be correlated both with the results supplied by inelastic neutron scattering spectra and by the recently developed theoretical model for phase transitions in sodium ammonium sulphate dihydrate type crystals.

Key words: sodium ammonium sulphate dihydrate, electron paramagnetic resonance, phase transitions
PACS: 76.30.K, 77.80.Bh