Gregor Schiwietz

Research related to ion energy losses

Research on Ion Energy-Losses covers very different field, such as:

• The energy-loss code CasP for simplified ab-initio calculations. This well-known code has been created here and may be obtained for free.
• The Atomic-Orbital coupled-channel method AO. The currently most precise energy-loss calculations for atoms and solids have been carried out using this method.
• Intra-Band Excitations: Theory of Ion Energy-Loss in Metals. The first quantum perturbation treatments have been performed here.
• Energy loss and transport of molecular ions. Experiments have been performed and quatum theory (perturbative and also non-perturbative have been invoked).
• Medium Energy Ion Scattering (MEIS) and other experimental high-resolution ion-beam techniques have been applied.

CasP: an Energy-Loss Program for Simplified Ab-initio Calculations (selected references)

1. P.L. Grande and G. Schiwietz,    
   "Impact-Parameter Dependence of the Electronic Energy Loss of Fast Ions",
   Phys.Rev. A58, 3796 (1998)
2. G. Schiwietz and P.L. Grande,
   "A Unitary Convolution Approximation for the Impact-Parameter Dependent Electronic Energy Loss",
   Nucl. Instr. and Meth. B153, 1 (1999)
3. G.M de Azevedo, P.L. Grande, and G. Schiwietz,
   "Impact-Parameter Dependent Energy Loss of Screened Ions",
   Nucl. Instr. and Meth. B164, 203 (2000)
4. G. de M. Azevedo, P. L. Grande, M. Behar, J.F. Dias, and G. Schiwietz,
   "Giant Barkas effect observed for light ions channeling in Si",
   Phys.Rev.Lett. 86, 1482-1485 (2001)
5. P.L. Grande and G. Schiwietz,
   "The unitary convolution approximation for heavy ions",
   Nucl. Instr. Meth. B195, 55-63 (2002)
6. L.L. Araujo, P.L. Grande, M. Behar, J.F. Dias, A.F. Lifschitz, N.R.Arsita, and G. Schiwietz,
   "Electronic energy loss of channeled ions: The giant barkas effect",    
   Phys. Rev. A70, 032903 (2004)
7. P.L. Grande and G. Schiwietz,
   "Ionization and energy loss beyond perturbation theory",
   in "Advances in Quantum Chemistry", vol. 45, pp.7-46 (book article ed. by J. Sabin, 2004, Elsevier Inc.)
8. R.C. Fadanelli, P.L. Grande, and G. Schiwietz,
   "Impact-parameter dependence of the energy loss of fast molecular clusters in hydrogen",
   Phys. Rev. A77 (3), 032902 (2008)
9. P.L. Grande and G. Schiwietz,
   "Convolution approximation for the energy loss, ionization probability and straggling of fast ions",
   Nucl. Instr. Meth. B 267, 859-865 (2009)

DOWNLOAD the CasP code for free!

The Atomic-Orbital Coupled-Channel method: Precision Energy-Loss Calculations for atoms and solids (three out of many references)

1. G. Schiwietz,
   "Coupled-Channel Calculation of Stopping Powers for Intermediate-Energy Light Ions Penetrating Atomic H and He Targets",
   Phys. Rev. A42, 296-306 (1990)
2. P.L. Grande and G. Schiwietz,
   "Ionization and energy loss beyond perturbation theory ",
   in “Advances in Quantum Chemistry”, vol. 45, pp.7-46
   (book article ed. by J. Sabin, 2004, Elsevier Inc.)
3. P.L. Grande, A. Hentz, R.P. Pezzi, I.J.R. Baumvol, and G. Schiwietz,
   Solved and unsolved problems in ion beam analysis: the influence of a single collision",
   Matematisk-fysiske Meddeleser 52:1, 151 (2006)

Intra-Band Excitations: Theory of Ion Energy-Loss in Metals

1. P.L. Grande, G. Schiwietz,
   "Energy Loss of Slow Ions: One-Band  Calculation for Alkaline Metals",
   Phys. Lett. A163, 439- 446 (1992)
2. G. Schiwietz, P.L. Grande,
   "Electronic Stopping Based on Atomic and Solid-State Wavefunctions",
   Radiation Effects and Defects in Solids 130/131, 137-156 (1994)
3. G. Schiwietz, P.L. Grande,
   "On the Treatment of Light-Ion Electronic Stopping in Dense Matter",
   Nucl. Instr. Meth. B90, 10-19 (1994)

Energy Loss and Transport of Molecular Ions (selected references on experiment and theory)

1. R.C. Fadanelli, P.L. Grande, M. Behar, J.F. Dias, G. Schiwietz, C.D. Denton,
   "Coulomb heating of channeled H2+ and H3+ molecules in Si",
   Phys. Rev. B69, 212104 (2004)
2. R.C. Fadanelli, P.L. Grande, G. Schiwietz,
   "Impact-parameter dependence of the electronic energy-loss of fast cluster projectiles",
   Nucl. Instr. Meth. B230, 17-23 (2005)
3. R.C. Fadanelli, P.L. Grande, M. Behar, J.F. Dias, G. Schiwietz,
   "The influence of the Coulomb explosion on the energy loss of H2+ and H3+ molecules channeling along the Si<100> direction",
   Nucl. Instr. Meth. B230, 96-99 (2005)
4. R.C. Fadanelli, P.L. Grande, M. Behar, and J.F. Dias, K. Czerski, G. Schiwietz,
   "Interplay between the Coulomb explosion and vicinage effects studied using H2+ molecules under channeling conditions",
   Phys. Rev. B73 (24), 245336 (2006)
5. R.C. Fadanelli, P.L. Grande, and G. Schiwietz,
   "Impact-parameter dependence of the energy loss of fast molecular clusters in hydrogen",
   Phys. Rev. A77 (3), 032902 (2008)

Medium Energy Ion Scattering (MEIS) and Other Experimental High-resolution Ion-Beam Techniques

1. W.H. Schulte, B.W. Busch, E. Garfunkel, T. Gustafsson, G. Schiwietz, and P.L. Grande,
   "Limitations to depth resolution in ion scattering experiments",
   Nucl. Instr. Meth. B183, 16-24 (2001)
2. G. Schiwietz and P.L. Grande,
   "The Role of Basic Energy-Loss Processes in Layer-resolved Surface Investigations with Ions",
   Current Applied Physics 3/1, 35-37 (2003)
3. P. L. Grande , A. Hentz, G. Schiwietz, W.H. Schulte, B.W. Busch, D. Starodub, T. Gustafsson,
   "Non-perturbative treatment of medium-energy proton scattering under shadowing-blocking conditions in Al(110)",
   Phys. Rev. B69, 104112, (2004)
4. P. L. Grande, A. Hentz, G. Schiwietz, D. Starodub, E. Garfunkel, and T. Gustafsson,
   "Observation of collective inner-shell effects for protons backscattered from the Al(110) surface",
   Phys. Rev. A72, 012902 (2005)
5. M.A. Munoz-Marquez, G.S. Parkinson, D.P. Woodruff, A. Hentz, P.L. Grande, G. Schiwietz, T.J. Wood, C. Bonet, S.P. Tear, P. Bailey, T.C.Q. Noakes,
   "Energy loss in medium-energy ion scattering: a combined theoretical and experimental study of the model system Y on Si(111)",
   Phys. Rev. B72, 075415-1-10 (2005)
6. A. Hentz, G.S. Parkinson, A.J. Window, P.D. Quinn, D.P. Woodruff, P.L. Grande, G. Schiwietz, P. Bailey, and T.C.Q. Noakes,
   "Inelastic energy loss in 100-keV H+ scattering from single atoms: Theory and experiment for K, Rb, and Cs",
   Phys. Rev. B74 (12), 125408 (2006)
7. P.L. Grande, A. Hentz, R.P. Pezzi, I.J.R. Baumvol and G. Schiwietz,
   "An analytical energy-loss line-shape for high depth resolution in ion-beam analysis ", Nucl. Instr. Meth. B256, 92–96 (2007)
8. R.P. Pezzi, P.L. Grande, M. Copel, G. Schiwietz, C. Krug, I.J.R. Baumvol,
   "Advanced ion energy-loss models: Applications to subnanometric resolution elemental depth profiling",
   Surface Science 601, 5559–5570 (2007)
9. R.P. Pezzi, C. Krug, P.L. Grande, E.B.O. da Rosa, G. Schiwietz, and I.J.R. Baumvol, "Analytical energy loss distribution for accurate high resolution depth profiling using medium energy ion scattering",
   Appl.Phys.Lett. 92, 164102 (2008)
10. M. Hazama, Y. Kitsudo, T. Nishimura, Y. Hoshino, P.L. Grande, G. Schiwietz, and Y. Kido,
    "Asymmetric Line Shapes for Medium Energy H and He Ions Undergoing a Large-angle Collision",
    Phys.Rev. B78, 193402 (2008)
11. A. Hentz, G.S. Parkinson, P.D. Quinn, M.A. Muñoz-Márquez, D.P. Woodruff, P.L. Grande, G. Schiwietz, P. Bailey, T.C.Q. Noakes,
    "Direct observation and theory of trajectory-dependent electronic energy losses in medium-energy ion scattering",
    Phys.Rev.Lett. 102, 096103 (2009)

Research related to ion energy losses

Research on Ion Energy-Losses covers very different field, such as:

• The energy-loss code CasP for simplified ab-initio calculations. This well-known code has been created here and may be obtained for free.
• The Atomic-Orbital coupled-channel method AO. The currently most precise energy-loss calculations for atoms and solids have been carried out using this method.
• Intra-Band Excitations: Theory of Ion Energy-Loss in Metals. The first quantum perturbation treatments have been performed here.
• Energy loss and transport of molecular ions. Experiments have been performed and quatum theory (perturbative and also non-perturbative have been invoked).
• Medium Energy Ion Scattering (MEIS) and other experimental high-resolution ion-beam techniques have been applied.

CasP: an Energy-Loss Program for Simplified Ab-initio Calculations (selected references)

1. P.L. Grande and G. Schiwietz,    
   "Impact-Parameter Dependence of the Electronic Energy Loss of Fast Ions",
   Phys.Rev. A58, 3796 (1998)
2. G. Schiwietz and P.L. Grande,
   "A Unitary Convolution Approximation for the Impact-Parameter Dependent Electronic Energy Loss",
   Nucl. Instr. and Meth. B153, 1 (1999)
3. G.M de Azevedo, P.L. Grande, and G. Schiwietz,
   "Impact-Parameter Dependent Energy Loss of Screened Ions",
   Nucl. Instr. and Meth. B164, 203 (2000)
4. G. de M. Azevedo, P. L. Grande, M. Behar, J.F. Dias, and G. Schiwietz,
   "Giant Barkas effect observed for light ions channeling in Si",
   Phys.Rev.Lett. 86, 1482-1485 (2001)
5. P.L. Grande and G. Schiwietz,
   "The unitary convolution approximation for heavy ions",
   Nucl. Instr. Meth. B195, 55-63 (2002)
6. L.L. Araujo, P.L. Grande, M. Behar, J.F. Dias, A.F. Lifschitz, N.R.Arsita, and G. Schiwietz,
   "Electronic energy loss of channeled ions: The giant barkas effect",    
   Phys. Rev. A70, 032903 (2004)
7. P.L. Grande and G. Schiwietz,
   "Ionization and energy loss beyond perturbation theory",
   in "Advances in Quantum Chemistry", vol. 45, pp.7-46 (book article ed. by J. Sabin, 2004, Elsevier Inc.)
8. R.C. Fadanelli, P.L. Grande, and G. Schiwietz,
   "Impact-parameter dependence of the energy loss of fast molecular clusters in hydrogen",
   Phys. Rev. A77 (3), 032902 (2008)
9. P.L. Grande and G. Schiwietz,
   "Convolution approximation for the energy loss, ionization probability and straggling of fast ions",
   Nucl. Instr. Meth. B 267, 859-865 (2009)

DOWNLOAD the CasP code for free!

The Atomic-Orbital Coupled-Channel method: Precision Energy-Loss Calculations for atoms and solids (three out of many references)

1. G. Schiwietz,
   "Coupled-Channel Calculation of Stopping Powers for Intermediate-Energy Light Ions Penetrating Atomic H and He Targets",
   Phys. Rev. A42, 296-306 (1990)
2. P.L. Grande and G. Schiwietz,
   "Ionization and energy loss beyond perturbation theory ",
   in “Advances in Quantum Chemistry”, vol. 45, pp.7-46
   (book article ed. by J. Sabin, 2004, Elsevier Inc.)
3. P.L. Grande, A. Hentz, R.P. Pezzi, I.J.R. Baumvol, and G. Schiwietz,
   Solved and unsolved problems in ion beam analysis: the influence of a single collision",
   Matematisk-fysiske Meddeleser 52:1, 151 (2006)

Intra-Band Excitations: Theory of Ion Energy-Loss in Metals

1. P.L. Grande, G. Schiwietz,
   "Energy Loss of Slow Ions: One-Band  Calculation for Alkaline Metals",
   Phys. Lett. A163, 439- 446 (1992)
2. G. Schiwietz, P.L. Grande,
   "Electronic Stopping Based on Atomic and Solid-State Wavefunctions",
   Radiation Effects and Defects in Solids 130/131, 137-156 (1994)
3. G. Schiwietz, P.L. Grande,
   "On the Treatment of Light-Ion Electronic Stopping in Dense Matter",
   Nucl. Instr. Meth. B90, 10-19 (1994)

Energy Loss and Transport of Molecular Ions (selected references on experiment and theory)

1. R.C. Fadanelli, P.L. Grande, M. Behar, J.F. Dias, G. Schiwietz, C.D. Denton,
   "Coulomb heating of channeled H2+ and H3+ molecules in Si",
   Phys. Rev. B69, 212104 (2004)
2. R.C. Fadanelli, P.L. Grande, G. Schiwietz,
   "Impact-parameter dependence of the electronic energy-loss of fast cluster projectiles",
   Nucl. Instr. Meth. B230, 17-23 (2005)
3. R.C. Fadanelli, P.L. Grande, M. Behar, J.F. Dias, G. Schiwietz,
   "The influence of the Coulomb explosion on the energy loss of H2+ and H3+ molecules channeling along the Si<100> direction",
   Nucl. Instr. Meth. B230, 96-99 (2005)
4. R.C. Fadanelli, P.L. Grande, M. Behar, and J.F. Dias, K. Czerski, G. Schiwietz,
   "Interplay between the Coulomb explosion and vicinage effects studied using H2+ molecules under channeling conditions",
   Phys. Rev. B73 (24), 245336 (2006)
5. R.C. Fadanelli, P.L. Grande, and G. Schiwietz,
   "Impact-parameter dependence of the energy loss of fast molecular clusters in hydrogen",
   Phys. Rev. A77 (3), 032902 (2008)

Medium Energy Ion Scattering (MEIS) and Other Experimental High-resolution Ion-Beam Techniques

1. W.H. Schulte, B.W. Busch, E. Garfunkel, T. Gustafsson, G. Schiwietz, and P.L. Grande,
   "Limitations to depth resolution in ion scattering experiments",
   Nucl. Instr. Meth. B183, 16-24 (2001)
2. G. Schiwietz and P.L. Grande,
   "The Role of Basic Energy-Loss Processes in Layer-resolved Surface Investigations with Ions",
   Current Applied Physics 3/1, 35-37 (2003)
3. P. L. Grande , A. Hentz, G. Schiwietz, W.H. Schulte, B.W. Busch, D. Starodub, T. Gustafsson,
   "Non-perturbative treatment of medium-energy proton scattering under shadowing-blocking conditions in Al(110)",
   Phys. Rev. B69, 104112, (2004)
4. P. L. Grande, A. Hentz, G. Schiwietz, D. Starodub, E. Garfunkel, and T. Gustafsson,
   "Observation of collective inner-shell effects for protons backscattered from the Al(110) surface",
   Phys. Rev. A72, 012902 (2005)
5. M.A. Munoz-Marquez, G.S. Parkinson, D.P. Woodruff, A. Hentz, P.L. Grande, G. Schiwietz, T.J. Wood, C. Bonet, S.P. Tear, P. Bailey, T.C.Q. Noakes,
   "Energy loss in medium-energy ion scattering: a combined theoretical and experimental study of the model system Y on Si(111)",
   Phys. Rev. B72, 075415-1-10 (2005)
6. A. Hentz, G.S. Parkinson, A.J. Window, P.D. Quinn, D.P. Woodruff, P.L. Grande, G. Schiwietz, P. Bailey, and T.C.Q. Noakes,
   "Inelastic energy loss in 100-keV H+ scattering from single atoms: Theory and experiment for K, Rb, and Cs",
   Phys. Rev. B74 (12), 125408 (2006)
7. P.L. Grande, A. Hentz, R.P. Pezzi, I.J.R. Baumvol and G. Schiwietz,
   "An analytical energy-loss line-shape for high depth resolution in ion-beam analysis ", Nucl. Instr. Meth. B256, 92–96 (2007)
8. R.P. Pezzi, P.L. Grande, M. Copel, G. Schiwietz, C. Krug, I.J.R. Baumvol,
   "Advanced ion energy-loss models: Applications to subnanometric resolution elemental depth profiling",
   Surface Science 601, 5559–5570 (2007)
9. R.P. Pezzi, C. Krug, P.L. Grande, E.B.O. da Rosa, G. Schiwietz, and I.J.R. Baumvol, "Analytical energy loss distribution for accurate high resolution depth profiling using medium energy ion scattering",
   Appl.Phys.Lett. 92, 164102 (2008)
10. M. Hazama, Y. Kitsudo, T. Nishimura, Y. Hoshino, P.L. Grande, G. Schiwietz, and Y. Kido,
    "Asymmetric Line Shapes for Medium Energy H and He Ions Undergoing a Large-angle Collision",
    Phys.Rev. B78, 193402 (2008)
11. A. Hentz, G.S. Parkinson, P.D. Quinn, M.A. Muñoz-Márquez, D.P. Woodruff, P.L. Grande, G. Schiwietz, P. Bailey, T.C.Q. Noakes,
    "Direct observation and theory of trajectory-dependent electronic energy losses in medium-energy ion scattering",
    Phys.Rev.Lett. 102, 096103 (2009)