Sensitivity of Positronium Momentum Distribution to Phase Transitions in Crystalline Dielectrics

I.V. Bondareva and T. Hyodob aThe Institute of Nuclear Problems, The Belarusian State University, Bobruiskaya Str. 11, 220050 Minsk, Belarus bInstitute of Physics, Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan

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Received: 20 09 2004;

We give a review of recent theoretical and experimental study of the positronium-phonon and positronium-quadrupole interactions in dielectric crystals of different local symmetries, placing a special emphasis on the sensitivity of the positronium momentum distribution to the second order phase transitions in crystalline dielectrics.

DOI: 10.12693/APhysPolA.107.673 PACS numbers:78.70.Bj, 71.60.+z, 71.38.-k, 36.10.Dr