Positrons

 

Selected presentations:

  1. G.P. Karwasz, R.S. Brusa, Application of positron annihilation techniques for semiconductor studiesWarsaw, 16.09.2003.
     
  2. G.P. Karwasz et al.Slow-positron beam studies of ZnSe and ZnTe compoundsPraga, 2008.
     
  3. A. Karbowski, K. Fedus, G. KarwaszBadania anihilacji pozytonów i fotoluminescencji dla nanostrukturalnego ZnO,13.06.2012.
     
  4. K. Fedus, A. Karbowski, D. Stolarz, G. P. Karwasz,  Positron annihilation in benzene and cyclohexane: a comparison between gas and liquid phase, 11th International Workshop on Positron and Positronium Chemistry, Goa, India, 2014
     
  5. K. Fedus, D. Stolarz, G. Karwasz, Towards matching between positron scattering in gas-phase and positron annihilation in condensed phase, 42nd Polish Seminar on Positron Annihilation, Lublin, Poland 2015

 

Selected publications:

  1. A. Karbowski, K. Fedus, J. Patyk, Ł. Bujak, G. Karwasz, Photoluminescence and positron annihilation lifetime studies on pellets of ZnO nanocrystals, Nukleonika 58(1), 189 - 194 (2013).
     
  2. K. Fedus, Positron annihilation in benzene and cyclohexane: a comparison between gas and liquid phase, J. Phys. Conf. Ser. 618, 012029-1 (2015).
  1. K. Fedus, Z. Idziaszek, G. Karwasz, Positron and electron scattering on atoms and molecules– modified effective range theory revisited, Eur. Phys. J.-Spec. Top. 222, 2335 - 2344 (2013).
     
  2. K. Fedus, G. Karwasz, Positron Scattering at Thermal Energies, Acta Phys. Pol. A 125, 829 (2014).
     
  3. K. Fedus, J. Franz, G. Karwasz, Positron scattering on molecular hydrogen: Analysis of experimental and theoretical uncertainties, Phys. Rev. A. 91, 062701-1 (2015).
     
  4. Jan Franz, K. Fedus, G. Karwasz, Do positrons measure atomic and molecular diameters?, Eur. Phys. J. D 70:155 (2016).
  1. Combined positron-annihilation and structural studies of hydrothermally grown zirconia, J. D. Fidelus, A. Karbowski, S. Mariazzi, E. Werner-Malento, R. S. Brusa, W. Zhou, G. P. Karwasz, Nanomaterials and Energy, 1, 2012, 97-105.
     
  2. Positron-annihilation, structural and optical studies on properties of nanostructured ZrO2, ZnO, Bi2O3 and ZnO-Bi2O3, J. D. Fidelus, A. Karbowski, J. Grabis, A. Jusza, R. Piramidowicz, R. S. Brusa and G. P.Karwasz, Acta Physica Polonica A 120 (2012) 66-68.
     
  3. Testing an ORTEC Lifetime System, A. Karbowski, J. D. Fidelus, G. Karwasz, Materials Science Forum, 666, 2011, 155-159.
     
  4. Positron-annihilation and photoluminescence studies of nanostructured ZrO2, J. D. Fidelus, A. Karbowski, S. Mariazzi, R. S. Brusa, G. Karwasz, Nukleonika 55 (2010), 85-89.
  1. Analytic approach to modified effective-range theory for electron and positron elastic scattering,
    K. Fedus, G. Karwasz, Z. Idziaszek, Phys. Rev. A 88 (2013) 012704
     
  2. Applicability of modified effective-range theory to positron-atom and positron-molecule scattering,
     Z. Idziaszek, G. Karwasz, Phys. Rev. A 73, 064701 (2006).

Barbarella pilnuje, aby promienie pozytonowe nie wpadły w niewłaściwe ręce

  1. Genetic algorithms for positron lifetime data,
    A. Karbowski, J. J. Fisz, G. P. Karwasz, J. Kansy, R. S. Brusa, Acta Physica Polonica A, 113 (2008) 1365-1372.
     
  2. Depth profiling of defects in He implanted SiO2,
    S. Mariazzi, L. Toniutti, R. S. Brusa, M. Duarte Naia, A. Karbowski, G. P. Karwasz,  Acta Physica Polonica A 113 (2008) 1447-1453.
  1. Positron scattering on benzene and cyclohexane: experiment and modified effective range theory, G. P. Karwasz, R. S. Brusa, Z. Idziaszek, A. Karbowski, The European Physical Journal Special Topics, 144 (2007) 197-201.
     
  2. G. P. Karwasz, A. Karbowski, Z. Idziaszek, R. S. Brusa, Total cross sections for positron scattering on benzene – angular resolution corrections, Nucl. Instr. Methods Phys. Res. B 266 (2008) 471-477.
 
  1. Wen Deng, Y.Y. Huang, R.S. Brusa, G.P. Karwasz, A.Zecca, Positron annihilation in B-doped and undoped single and polycrystalline Ni3Al alloys, J. Alloys Compounds, 421 (2006) 228-231
  1. D. Pliszka, B. Kusz, M. Gazda, K. Trzebiatowski, G. P. Karwasz, R.S. Brusa, A. Zecca, Positron-annihilation monitoring of reduction processes in conducting glasses, J. Alloys and Compounds, 382 (2004) 257
     
  2. Application of positron annihilation techniques for semiconductor studies,
    G. P. Karwasz, A. Zecca, R.S. Brusa, D.Pliszka, J. Alloys and Compounds, 382 (2004) 244.
     
  3.  Effects of Zr and Nb on d electrons in NiAl alloy studied by coincidence positron annihilation spectroscopy,
    W. Deng, J. T. Guo, R.S. Brusa, G.P. Karwasz, A. Zecca , Materials Letters 59 (2005): 3389 
  1. No - erratum to positron helium resonances,
    G. P. Karwasz , R. S. Brusa, D. Pliszka, Nucl. Instr. Meth. B 251 (2006) 5206
     
  2. On positron scattering on He (and Ar) at low energies. Reply to the comment ,
    G. P. Karwasz, Eur. Phys. J. D 37, 153–154 (2006).
     
  3. Positrons - an alternative probe to electron scattering,
    G.P. Karwasz, Eur. Phys. J. D 35 (2005) 267
     
  4. Positron scattering in helium: virtual - positronium resonances,
    G.P. Karwasz, D. Pliszka, A. Zecca, R.S. Brusa, Nucl. Instr. Meth. B 250 (2005) 666.
     
  5. Low Energy Cross Sections for Positron Interactions with Cyclic Hydrocarbons ,
    G.P. Karwasz, D. Pliszka, R.S. Brusa, C. Perazzolli, A. Zecca, Acta Phys. Pol. 107 (2005) 666.
     
  6. Total cross sections for positron scattering on benzene and nitrogen, 
    G. P Karwasz, D Pliszka, A Zecca, R S Brusa, J. Phys. B, 38 (2005) 1-13 (accepted).
  1. Depth profiled porosity and micro-structure evolution studied by Positron Annihilation and Raman Spectroscopy in SiOCH Low-k Films
    C. Macchi, G. Mariotto, G.P. Karwasz, A. Zecca, M. Bettonte, R.S. Brusa, Materials Science in Semiconductor Processing, 7 (2004) 289-294.
     
  2. Application of positron annihilation techniques for semiconductor studies
    G.P. Karwasz, A. Zecca, R.S. Brusa, D.Pliszka, J. Alloys and Compounds, 382 (2004) 244.
     
  3. Positron-annihilation monitoring of reduction processes in conducting glasses,
    D. Pliszka, B. Kusz, M. Gazda, K. Trzebiatowski, G. P. Karwasz, R.S. Brusa, A. Zecca, J. Alloys and Compounds, 382 (2004) 257.
     
  4. Studies of coincidence Doppler broadening of the electron-positron annihilation radiation in the single crystalline Bi2Sr2CaCu2O8 superconductor,
    M. Chakrabarti, A. Sarkar, D. Sanyal, G.P. Karwasz, A. Zecca, Physics Letters A, 321 (2004) 376.
  5. A novel set-up for positron scattering in gases,
    A. Zecca, R.S. Brusa, M. Bettonte, E. Rajch, S. Mariazzi and G.P. Karwasz, Radiation in Physics and Chemistry Journal, 68 (2003) 319-22

  6. Doppler-broadening measurements of positron annihilation with high-momentum electrons in pure metals.
    R.S. Brusa, W.Deng, G.P. Karwasz, A.Zecca, Nuclear Instruments and Methods in Physical Research B 194 (2002) 519.

  7. Total cross sections for positron scattering on argon and krypton at intermediate and high energies,
    G. P. Karwasz, M. Barozzi, R.S. Brusa, A. Zecca, Nuclear Instruments and Methods in Physical Research B 192 (2002) 157.

  8. Positron study of defects in a-SixC1-x films produced by ion beam deposition method,
    M.Reinoso, R.S. Brusa, A.Somoza, W.Deng, G.P.Karwasz, A.Zecca, E.B.Halac, H.Huck, Appl.Surf.Science 177 (2001) 96.

  9. A very low-energy apparatus for positron scattering on atoms and molecules,
    G.Karwasz, R.S. Brusa, M.Barozzi and A.Zecca, Nuclear Instr. and Methods in Physics B 171 (2000) 178

  10. A high performance electrostatic positron beam,
    R.S. Brusa, G.P. Karwasz, M. Bettonte, A. Zecca, Applied Surface Science 116 (1997) 59-62

  1. A pulsed positron microbeam,
    A.Zecca, R.S.Brusa, M.P.Duarte-Naia, G.P.Karwasz, J.Paridaens, A.Piazza, G.Kogel, P.Sperr, D.T.Britton, K.Uhlmann, P.Willutzki, W.Triftshauser, Europhysics Lett. 29 (1995) 617-22.
 

 

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