Positrons and Positronium Atoms in a Condensed Phase Close to Its Melting Point
S.V. Stepanova, b, D.S. Zvezhinskiya, V.M. Byakova, c, G. Dupl√Ętred and P.S. Stepanova,b
aInstitute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218, Moscow, Russia
bNational Research Nuclear University "MEPhI", Kashirskoye shosse 31, Moscow, 115409, Russia
cD. Mendeleyev University of Chemical Technology of Russia, Miusskaya sq. 9, 125047, Moscow, Russia
dInstitut Pluridisciplinaire Hubert Curien, CNRS/IN2P3, BP 28 67037 Strasbourg, Cedex 2, France
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Investigation of the local heating effect at the terminal part of a fast positron track sheds light on the accumulation of defects in a frozen medium close to its melting point. Estimations of the formation energies of the structural defects which may trap the Ps atom as well as a contribution of these defects to the enthalpy of fusion are obtained.

DOI: 10.12693/APhysPolA.125.691
PACS numbers: 71.60.+z, 34.80.Lx, 78.70.Bj, 82.30.Gg