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dr Marek Pietrow


Zakład Metod Jądrowych




pokój: 42B
telefon: (081) 537-62-86
e-mail: mrk@kft.umcs.lublin.pl
strona www: http://kft.umcs.lublin.pl/mrk/

Publikacje: Ukryj abstrakty

  1. T. Goworek, M. Pietrow, R. Zaleski, B. Zgardzińska, Positronium in high temperature phases of long-chain even alkanes, Chemical Physics, 355(), 2009, 123-129

  2. Zaleski, R. Zgardzińska, B. Pietrow, M. Goworek, T., Positron irradiation effects in simple organic solids, Radiation Physics and Chemistry, 77(), 2008, 1306-1310

  3. Zgardzińska, B. Zaleski, R. Wawryszczuk, J. Pietrow, M. Goworek, T., Intermolecular free volumes and intramolecular defects in alkanes,Czech Republic, Praha, Abstract of International workshop, Positron studies in defects, (), 2008, 50

  4. Pietrow, M. Zaleski, R. Goworek, T., Positronium in 1-tridecene, Chemical Physics, 342(), 2007, 85-89

  5. Zgardzinska, B. Pietrow, M. Goworek, T. Wawryszczuk, J., Ortho-positronium in some n-alkanes; Influence of temperature and pressure, Acta Physica Polonica A, 110(5), 2006, 747-753

    Positron lifetime spectra were measured for a series of odd- numbered n-alkanes from C11H24 to C19H40 as a function of temperature and pressure. The ortho-Ps lifetimes in the rotator phase and the increase in intensity at the transition to that phase can be explained by location of Ps in the vicinity of kink-type conformers. The relation between o-Ps lifetime and molecule length can be described in the framework of extended Tao-Eldrup model. One can eliminate the effect of intensity rise in time by sample illumination or by application of high pressure. A decrease in temperature by 1 K is equivalent to an increase in pressure by about 4 MPa.

  6. Pietrow, M. Zgardzinska, B., Influence of positron irradiation on positronium formation in n-alkanes, Acta Physica Polonica A, 110(5), 2006, 641-648

    Positronium formation probability was investigated as a function of irradiation time and temperature for some long- chain saturated hydrocarbons (alkanes). Intensity of ortho- positronium component in the lifetime spectrum depends on the concentration of trapped excess electrons, but also on concentration of radicals and ions acting as electron scavengers. The results indicate the existence of two kinds of electron traps; those which are not emptied by thermal treatment disappear after several days of positron irradiation.

  7. Gozdz, A. Debicki, M. Pietrow, M., Projection evolution and decay of a system, International Journal of Modern Physics E-Nuclear Physics, 14(3), 2005, 477-484

    We show that the projection evolution approach can reproduce the exponential decay law. The method can be potentially used to calculate the lifetimes of decaying nuclei.

  8. Gozdz, A. Pietrow, M., Quantum motion algebras, Physics of Particles and Nuclei, 33(), 2002, S74-S79

    The notion of groups of motions as groups of elementary changes in quantum states leads to the Quantum Motion Algebras. These algebras can be considered a good tool for analyzing quantum motion in many-body problems and also in more fundamental quantum mechanics.

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