1. "Design Parameters of Iodine Vapor Ultraviolet Photon Counter", W.E. Kauppila, W.R. Ott, and W.L. Fite, Rev. Sci. Instr. 38, 811 (1967).

2. "Polarization of Lyman-alpha Radiation Produced in Collisions of Electrons and Hydrogen Atoms", W.R. Ott, W.E. Kauppila, and W.L. Fite, Phys. Rev. Letters 19, 1361 (1967).

3. "Polarization of Lyman-alpha Radiation Emitted by H(2S) Atoms in Weak Electric Fields", W.L. Fite, W.E. Kauppila, W.R. Ott, Phys. Rev. Letters 20, 409 (1968).

4. "Polarization of Lyman-alpha Radiation Emitted in Electron Collisions with Hydrogen Atoms and Molecules", W.R. Ott, W.E. Kauppila, and W.L. Fite, Phys. Rev. A 1, 1089 (1970).

5. "Excitation of Atomic Hydrogen to the Metastable 2²S_1/2 State by Electron Impact", W.E. Kauppila, W.R. Ott, and W.L. Fite, Phys. Rev. A 1, 1099 (1970).

6. "The Polarization of Lyman-alpha Radiation Produced by Direct Excitation of Hydrogen Atoms by Proton Impact", W.E. Kauppila, P.J.O. Teubner, W.L. Fite and R.J. Girnius, Phys. Rev. A 2, 1759 (1970).

7. "The Polarization of Lyman-alpha Radiation Produced in Charge Transfer Collisions Between Protons and the Inert Gases", P.J.O. Teubner, W.E. Kauppila, W.L. Fite, and R.J. Girnius, Phys. Rev. A 2, 1763 (1970).

8. "Lyman-alpha Emission Induced by the Collisions of Electrons with Molecular Hydrogen", W.E. Kauppila, P.J.O. Teubner, W.L. Fite and R.J. Girnius, J. Chem. Phys. 55, 1670 (1971).

9. "Absolute Differential Elastic and Inelastic Scattering Cross Sections in 25-140 KeV He⁺-He Collisions", Victor Pol, Walter Kauppila, and John T. Park, Phys. Rev. A8, 2990 (1973).

10. "Measurement of Spiraling in a Magnetically Confined Electron Beam for Use in Collision Studies", P.O. Taylor, K.T. Dolder, W.E. Kauppila, and G.H. Dunn, Rev. Sci. Instr. 45, 538 (1974).

11. "Absolute Cross Sections for Electron Impact Excitation of N₂⁺", D.H. Crandall, W.E. Kauppila, R.A. Phaneuf, P.O. Taylor, and G.H. Dunn, Phys. Rev. A 9, 2545 (1974).

12. "Production of a Monochromatic, Low Energy Positron Beam Using the ¹¹B(p,n)¹¹C Reaction", T.S. Stein, W.E. Kauppila, and L.O. Roellig, Rev. Sci. Instr. 45, 951 (1974).

13. "Near-Thermal Energy Width of Moderated High Energy Positrons", T.S. Stein, W.E. Kauppila, and L.O. Roellig, Phys. Letts. 51A, 327 (1975).

14. "Direct Observation of a Ramsauer-Townsend Effect in Positron-Argon Collisions", W.E. Kauppila, T.S. Stein, and G. Jesion, Phys. Rev. Letters 36, 580 (1976).

15. "Transmission Experiment for Measuring Total Positron-Atom Collision Cross Sections in a Curved, Axial Magnetic Field", W.E. Kauppila, T.S. Stein, G. Jesion, M.S. Dababneh, and V. Pol, Rev. Sci. Instrum. 48, 822 (1977).

16. "Measurements of Total Scattering Cross Sections for Low-Energy Positrons (and Electrons) Colliding with Helium and Neon Atoms", T.S. Stein, W.E. Kauppila, V. Pol, J.H. Smart, and G. Jesion, Phys. Rev. A17, 1600 (1978).

17. "Measurements of Total Scattering Cross Sections for Low Energy Positrons and Electrons Colliding with Krypton and Xenon", M.S. Dababneh, W.E. Kauppila, J.P. Downing, F. Laperriere, V. Pol, J.H. Smart, and T.S. Stein, Phys. Rev. A 22, 1872 (1980).

18. "Measurements of Total Scattering Cross Sections for Intermediate Energy Positrons and Electrons Colliding with Helium, Neon, and Argon", W.E. Kauppila, T.S. Stein, J.H. Smart, M.S. Dababneh, Y.K. Ho, J.P. Downing, and V. Pol, Phys. Rev. A 24, 725 (1981).

19. "Analysis of Low Energy Positron-Helium Total Cross Sections", J.M. Wadehra, T.S. Stein, and W.E. Kauppila, J. Phys. B: At. Mol. Phys. 14, L783 (1981).

20. "Total Cross Section Measurements of Positrons and Electrons Colliding with H₂, N₂, and CO₂", K.R. Hoffman, M.S. Dababneh, Y.-F. Hsieh, W.E. Kauppila, V. Pol, J.H. Smart, and T.S. Stein, Phys. Rev. A 25, 1393 (1982).

21. "Total Scattering Cross Section Measurements for Intermediate Energy Positrons and Electrons Colliding with Kr and Xe", M.S. Dababneh, Y.-F. Hsieh, W.E. Kauppila, V. Pol. and T.S. Stein, Phys. Rev. A 26, 1252 (1982).

22. "e^+,--CO and e^+,--CO₂ Total Cross Section Measurements", Ch.K. Kwan, Y.-F. Hsieh, W. E. Kauppila, S.J. Smith, T.S. Stein, M.N. Uddin, and M.S. Dababneh, Phys. Rev. A 27, 1328 (1983).

23. "Electron-Positron Scattering Comparisons", W.E. Kauppila and T.S. Stein, in Physics News in 1983, Phillip F. Schewe, Editor (American Institute of Physics, New York, 1983) pp. 77-78.

24. "Critical Points in Low Energy Positron-Atom Scattering", J.M. Wadehra, T.S. Stein, and W.E. Kauppila, Phys. Rev. A 29, 2912 (1984).

25. "Total Scattering Measurements and Comparisons for Collisions of Electrons and Positrons with N₂O", Ch.K. Kwan, Y.-F. Hsieh, W.E. Kauppila, Steven J. Smith, T.S. Stein, and M.N. Uddin, Phys. Rev. Letters 52, 1417 (1984).

26. "Total Cross Section Measurements for Positrons and Electrons Colliding with Potassium", T.S. Stein, R.D. Gomez, Y.-F. Hsieh, W.E. Kauppila, C.K. Kwan, and Y.J. Wan, Phys. Rev. Letters 55, 488 (1985).

27. "Positron Differential Elastic Scattering Cross Section Measurements for Argon", G.M.A. Hyder, M.S. Dababneh, Y.-F. Hsieh, W.E. Kauppila, C.K. Kwan, M. Mahdavi-Hezaveh, and T.S. Stein, Phys. Rev. Letters 57, 2252 (1986).

28. "Total Cross Section Measurements for Positron and Electron Scattering by O₂, CH₄, and SF₆", M.S.Dababneh, Y.-F. Hsieh, W.E. Kauppila, C.K. Kwan, Steven J. Smith, T.S. Stein, and M.N. Uddin, Phys. Rev. A38, 1207 (1988).

29. "Evidence for Absorption Effects in Positron Elastic Scattering by Argon", Steven J. Smith, G.M.A. Hyder, W.E. Kauppila, C.K. Kwan and T.S. Stein, Phys. Rev. Letters 64, 1227 (1990).

30. "Total Cross-Section Measurements for Positrons and Electrons Scattered by Sodium and Potassium Atoms", C.K. Kwan, W.E. Kauppila, R.A. Lukaszew, S.P. Parikh, T.S. Stein, Y.J. Wan and M.S. Dababneh, Phys. Rev. A 44, 1620 (1991).

31. "Measurements of Total Cross Sections for Positron-K and -Rb Scattering", T.S. Stein, W.E. Kauppila, C.K. Kwan, R.A. Lukaszew, S.P. Parikh, D. Przybyla and S. Zhou, Hyperfine Interactions 73, 205 (1992).

32. "Observation of Structure in Intermediate Energy Positron-Argon Differential Elastic Scattering", L. Dou, W.E. Kauppila, C.K. Kwan and T.S. Stein, Phys. Rev. Letters 68, 2913 (1992).

33. "Evidence for Resonances and Absorption Effects in Positron-Krypton Differential Elastic Scattering", L. Dou, W.E. Kauppila, C.K. Kwan, Steven J. Smith and T.S. Stein, Phys. Rev. A 46, R5327 (1992).

34. "Toward Measurements of Total Cross Sections for Positrons and Electrons Scattered by Potassium and Rubidium Atoms", S.P. Parikh, W.E. Kauppila, C.K. Kwan, R.A. Lukaszew, D. Przybyla, T.S. Stein and S. Zhou, Phys. Rev. A 47, 1535 (1993).

35. "Measurements of Total Cross Sections for Positrons and Electrons Colliding with Atomic Hydrogen", S. Zhou, W.E. Kauppila, C.K. Kwan and T.S. Stein, Phys. Rev. Letters 72, 1443 (1994).

36. "A Check for Consistency Between Positron-Atomic Hydrogen Total, Positronium Formation, and Ionization Cross Section Measurements", T.S. Stein, W.E. Kauppila, C.K. Kwan and S. Zhou, Hyperfine Interactions 89, 461 (1994).

37. "Measurements of Total Cross Sections for Positrons and Electrons Colliding with Atomic Hydrogen", S. Zhou, W.E. Kauppila, C.K. Kwan and T.S. Stein, Hyperfine Interactions 89, 483 (1994).

38. "Measurements of Positronium Formation Cross Sections for Positron Scattering by K, Na and Ar Atoms", S. Zhou, S.P. Parikh, W.E. Kauppila, C.K. Kwan, D. Lin, A. Surdutovich and T.S. Stein, Phys. Rev. Letters 73, 236 (1994).

39. "Evidence for channel-coupling effects in positron scattering by sodium and potassium atoms", W.E. Kauppila, C.K. Kwan, T.S. Stein and S. Zhou, J. Phys. B: At. Mol. Opt. Phys. 27, L551 (1994).

40. "Measurements of positronium-formation cross sections for positrons scattered by Rb atoms", A. Surdutovich, J. Jiang, W.E. Kauppila, C.K. Kwan, T.S. Stein and S. Zhou, Phys. Rev. A 53, 2861 (1996).

41. "Measurements of total and positronium formation cross sections for positrons and electrons scattered by hydrogen atoms and molecules", S. Zhou, H. Li, W.E. Kauppila, C.K. Kwan, and T.S. Stein, Phys. Rev. A 55, 361 (1997).

42. "Measurements of positron-methane differential scattering cross sections", D. Przybyla, W.E. Kauppila, C.K. Kwan, S.J. Smith and T.S. Stein, Phys. Rev. A 55, 4244 (1997).

43. "Measurements of Positron-Molecule Differential Scattering Cross Sections", D.A. Przybyla, W. Addo-Assah, W.E. Kauppila, C.K. Kwan, and T.S. Stein, Nucl. Instr. and Meth. in Phys. Res. B. 143, 57 (1998).

44. "Measurements of differential cross sections for positrons scattered from N₂, CO, O₂, N₂O and CO₂", D.A. Przybyla, W. Addo-Assah, W.E. Kauppila, C.K. Kwan, and T.S. Stein, Phys. Rev. A 60, 359 (1999).

45. "Positron Quasielastic Scattering by Molecules", W.E. Kauppila, C.K. Kwan, D. Przybyla, and T.S. Stein, accepted for publication in Nuclear Instruments and Methods in Physics Research, Section B, Beam Interactions with Materials and Atoms (NIM-B) (2001).

46. "Positronium formation in e⁺-Li and e⁺-Na collisions at low energies", E. Surdutovich, J.M. Johnson, W.E. Kauppila, C.K. Kwan, and T.S. Stein, accepted for publication in Physical Review A (2001).

Chapters Published and Editorship of Book
Invited Review Articles
Papers Published in Conference Proceedings