Gregory Lapicki


Department of Physics, East Carolina University, Greenville, NC 27858, USA


Research Interests:
Theoretical atomic physics.

Main Research Directions:
Inner-shell ionization and energy loss of charged particles in matter. Development and improvement of the ECPSSR theory of K-, L-, and M-shell ionization that is widely used for comparison with x-ray and Auger-electron production cross sections; in particular in PIXE analysis.

Editorial Boards:
Advanced Studies in Theoretical Physics

Selected publications:

  1. W. Brandt and G. Lapicki, L-shell Coulomb ionization by heavy charged particles, Phys. Rev. A 20, 465-479 (1979).
  2. G. Lapicki and W. Losonsky Coulomb deflection in ion-atom collisions, Phys.Rev.A 20 , 481-490 (1979).
  3. G. Lapicki and F. D. McDaniel, Electron capture from K shells by fully stripped ions, Phys.Rev.A 22, 1896-1905 (1980).
  4. W. Brandt and G.Lapicki, Energy-loss effect in in inner shell Coulomb ionization by heavy charged particles, Phys.Rev.A 23, 1717-1729 (1981).
  5. G. Lapicki and W. Lichten, Reconciliation of atomoc- and molecular orbital models in slow and symmetric collisions, Phys.Rev.A 31, 1354-1361 (1985).
  6. G. Lapicki, Cross sections for K-shell x-ray production by hydrogen and helium ions, J.Phys.Chem. Data 18, 111-218 (1989).
  7. G. Lapicki, Testing of the ECPSSR theory and its modifications with ratios of antiproton-to-proton ionization cross sections, Nucl.Instr.Meth B 2141, 34-42 (2005).
  8. G. Lapicki, Scaling of analytical cross sections for K-shell ionization by nonrelativistic protons to cross sections by protons at relativistic velocities, J.Phys.B 41, 115201-115214 (2008).
  9. J. Miranda and G. Lapicki, Experimental cross sections for L-shell x-ray production and ionization by protons, At. Data.Nucl.Data Tables 100, 651-780 (2014).
  10. M. Czarnota, D. Banaś, J. Braziewicz, J. Semaniak, M. Pajek, M. Jaskóła, A. Korman, D. Trautmann, W. Kretschmer, G. Lapicki, and T. Mukoyama, "X-ray study of M-shell ionization of heavy atoms by 8.0-35.2 Mev Oq+ ions: The role of multiple ionization effects", Phys.Rev. A 79, 032710-032724 (2009).
  11. L.C. Phinney, J.L. Duggan, G. Lapicki, F.U. Nabb, K. Hossain, and F.D. McDaniel, "Thorium and uranium M-shell x-ray production by 0.4-4.0 Mev protons and 0.4-6.0 Mev helium ions", J.Phys. B 42, 085202-085210 (2009).
  12. G. Lapicki, "Evaluation of cross sections for Lα x-ray production by up to 4 MeV protons in representative elements from silver to uranium", J. Phys. B 42 , 145204-145214. (2009).
  13. D. Mitra, M. Sarkar, D. Bhattacharya, S. Santra, A. C. Mandal, G. Lapicki, "Lower and upper bounds on M-shell X-ray production cross sections by heavy ions", Nucl. Instr. Meth. B 268 450-459 (2010).
  14. G. Lapicki and J. Miranda, "Updated database for L x-ray production by protons and extraction of L-subshell ionization cross sections from only L γ and L α + L β cross sections" , X-Ray Spectrometry 40, 122-126 (2011).
  15. L.C. Phinney, G. Lapicki, D.L. Weathers, F.U. Naab, J.L. Duggan, and F.D. McDaniel "Thorium and uranium M-shell x-ray production cross sections by 4.5-11.3 MeV carbon ion and 4.5-13.5 MeV oxygen ion bombardment", J.Phys. B 45, 035205-035213 (2012).
  16. J. Miranda and G. Lapicki, "Experimental cross sections for L-shell x-ray production and ionization by protons", At.DataNucl.DataTables, 100 , 651-780 (2014).
  17. G. Lapicki, "Werner Brandt legacy to PIXE: Past and present ", Nucl. Instr. Meth. B 318. 6-10 (2014).
  18. D. D. Cohen, E. Stelcer, J. Crawford, A. Atanacio, C. Doherty, and G. Lapicki, "Comparison of proton and helium induced M subshell x-ray production cross sections with the ECUSAR theory", Nucl. Instr. Meth. B 318, 11-14 (2014).
  19. Ž. Smit and G. Lapicki, "Energy loss in the ECPSSR theory and its calculation with exact integration limits", J. Phys. B 47, 055203-055210 (2014).
  20. G. Lapicki, "Analytical formulas for differential cross sections for ejection of electrons in ionization of water by protons in the PWBA and ECPSSR", J. Phys.Conf.Series 635, 022015 (2015).
  21. S. Kumar, U. Singh, M. Oswal, G. Singh, N. Singh, D. Mitra, T. Nandi, G. Lapicki, "L shell x-ray production in high-Z elements using 4-6 MeV/u fluorine ions", Nucl. Instr. Meth. B 395 39-51 (2017).