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Department of Nuclear Methods

About us

Zakład Metod Jądrowych (Department of Nuclear Methods) belongs to the Institute of Physics at Maria Curie-Sklodowska University in Lublin (Poland) and is dedicated mainly to the positron annihilation methods in application to solid state physics and chemistry. Other groups in the Institute are involved in Mösbauer Spectroscopy and Perturbated Angular γ-γ correlations.

In the positrongroup we are interested mainly in positronium formation and properities, thus the object of study are insulators, in particular organic solids or porous silica-based materials.


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'Positronium lifetime vs. temperature and free volume size tables. Pick-off model calculations.' [R. Zaleski, 'EL-Press', Lublin (2002)]


T. Goworek, R. Zaleski, J. Wawryszczuk
Observation of intramolecular defects in n-alkanes C25H52 - C29H60 by the positron annihilation method,
Chem. Phys. Lett. 394, 90-92 (2004)

Fig. ortho-Ps lifetime τ3 as a function of temperature for alkanes: open diamonds - n=24; full diamonds - n=25; open circles - n=26; squares - n=27; full circles - n=29. Tm is the melting temperature.


8th International Workshop on Positron and Positronium Chemistry

4 - 9 September, 2005, Coimbra, Portugal

Oral presentations:

  1. T. Goworek
    Free volumes in solids under high pressure
  2. R. Zaleski
    Pick off models in the studies of mesoporous silica MCM 41. The comparison of various methods of the PAL spectra analysis.


  1. T. Goworek, J. Wawryszczuk, R. Zaleski, B. Zgardzinska
    Positronium in Solid Phases of Long-Chain Paraffins
  2. T.Goworek, J.Wawryszczuk, A.Danch, W.Osoba
    Comparison of the Influence of Low Temperature and High Pressure on the Free Volume in Polymethylpentene