Effects of Local Heating and Premelting in the Terminal Part of the e+ Track

Dmitry Zvezhinskiy; Sergey V. Stepanov; Vsevolod Byakov; Bożena Zgardzińska

doi:10.4028/www.scientific.net/MSF.733.15

Paper Titles

Preface, Committees and Sponsors

Positrons and Free Volume Related Issues in Polymeric Systems: A Sketch of Günter Dlubek's Contributions
p.1

Beyond the Point Ps Approximation
p.7

Effects of Local Heating and Premelting in the Terminal Part of the e⁺ Track
p.15

Towards the Positronium and Radiolytic Hydrogen Formation Mechanisms in Liquid Hydrocarbons
p.19

Testing of the Extended Tao-Eldrup Model on Porous VP-DVB Copolymers
p.24

Ps Bubble in Liquids
p.29

The Free Volume Dynamics
p.33

Study of Unbound HePs Using Exact Diagonalization Technique
p.38

HomeMaterials Science ForumMaterials Science Forum Vol. 733Effects of Local Heating and Premelting in the...

Effects of Local Heating and Premelting in the Terminal Part of the e⁺ Track

Abstract:

The terminal part of the e₊ track (the positron blob) is formed during ionization slowing down and subsequent ion-electron recombinations produced by a positron. It releases up to 1 keV of energy, which is converted into heat within few picoseconds. If a bulk temperature of a medium is below, but close enough to its melting point, some region of a substance may melt, yielding a peculiar temperature dependence of the lifetime (LT) spectra. We have estimated properties of the molten region with a help of macroscopic heat con- duction equation and suggested a model describing temperature dependence of the ortho- positronium lifetime in frozen methanol, ethanol, butanol and water close to their melting points.