Publications of W. Sandhas

  1. Moeller Operators for Scattering on Singular Potentials (with J. Kupsch), Commun. Math. Phys. 2, 147 (1966).

  2. Absorptive Corrections to the Reaction γp -> Nπ in the One Pion Exchange Model with Gauge Invariant Extension (with M.P. Locher), Z. Physik 195, 461 (1966).

  3. Definition and Existence of Multichannel Scattering States, Commun. Math. Phys. 3, 358 (1966).

  4. One-Photon-Exchange Processes and Inelastic Form Factors (with J. Zeiler), Z. Physik 199, 479 (1967).

  5. Reduction of the Three-Particle Collision Problem to Multichannel Two-Particle Lippmann-Schwinger Equations (with E.O. Alt and P. Grassberger), Nucl. Phys. B2, 167 (1967).

  6. Systematical Treatment of the Nonrelativistic N-Particle Scattering Problem (with P. Grassberger), Nucl. Phys. B2, 181 (1967).

  7. Photoproduction of N*(1236) by Polarized γ-Quanta (with K. Böckmann and H. Wessel), Z. Phys. 202, 477 (1967).

  8. Quantenmechanische Stoßtheorie zusammengesetzter Teilchen, Bonn - Preprint 2-23 (Habilitationsschrift 1967).

  9. Derivation of the DWBA in an Exact Three-Particle Theory (with E.O. Alt and P. Grassberger), Nucl. Phys. A139, 2O9 (1969).

  10. Solution of the Multichannel Collision Problem by the Quasiparticle Method without the Use of Faddeev's Theory (with P. Grassberger), Z. Physik 217, 9 (1968).

  11. Theorie der Dreiteilchenstöße, Fachberichte der Physikertagung, (Karlsruhe 1968).

  12. Relation between the Projection Operator Formalism and the Faddeev Theory (with P. Grassberger), Z. Physik 220, 29 (1969).

  13. Treatment of the Three- and Four-Nucleon-Systems by a Generalized Separable Potential Model (with E.O. Alt and P. Grassberger), Phys. Rev. C1, 85 (1970).

  14. Quasiparticle Calculations for a Three-Body Model with Local Potentials (with E.O. Alt and P. Grassberger), Phys. Rev. D1, 2581 (1970).

  15. Composite Particle Collisions in the Nonrelativistic Three-Body Theory, in: Particle Physics, ed.: P. Urban, Acta Phys. Austriaca, Suppl. VI, 454 (1969).

  16. Application of the Quasi-Particle Method to the Three-Body Problem: Calculations for a Model with Local Potentials (with E.O. Alt and P. Grassberger), in Three-Body-Problem in Nuclear and Particle Physics, ed.: J.S.C. McKee and P.M. Rolph (Amsterdam 1970), p. 275.

  17. Variational Method for the Effective Two-Particle Formulation of the Three-Body Collision Problem (with E.O. Alt and P. Grassberger), Phys. Rev. D6, 432 (1972).

  18. Variational Principles for N-Particle Scattering (with E.O. Alt and P. Grassberger), Kabul Science, Vol. 2-3, No. 2 (1971).

  19. Excited States in the Three-Body System (with E.O. Alt and P. Grassberger), Nuovo Cimento, 8A, 211 (1972).

  20. Three-Nucleon Calculations with Local Potentials, Acta Physica Academiae Scientiarum Hungarica, 33, 2 (1973).

  21. The Three-Body Problem, in: Elementary Particle Physics, ed.: P. Urban, Acta Phys. Austriaca, Suppl. IX, 57 (1972).

  22. Systematical and Practical Treatment of the Few-Body Problem (with E.O. Alt and P. Grassberger), JINR, E4-6688, Dubna (1972).

  23. Systematical Multiparticle Theory and its Application to the Four- Nucleon-Problem (with E.O. Alt and P. Grassberger), in Few Particle Problems, ed.: I. Slaus et al. (Amsterdam 1972), p. 299.

  24. Quasiparticle Calculations for the Three-Nucleon System (with E.O. Alt), in Few Particle Problems, ed.: I. Slaus et al. (Amsterdam 1972), p. 314.

  25. The N-Body Problem, in Progress in Particle Physics, ed.: P. Urban, Acta Phys. Austriaca, Suppl. XIII, 679 (1974).

  26. N-Body Integral Equations and Four-Nucleon Calculations, Czech. J. Phys. B25, 251 (1975).

  27. Comments on the Validity of the Unitary Pole Approximation (with B.L.G. Bakker), Czech. J. Phys. B25, 259 (1975).

  28. Criterion for the Validity of the Unitary Pole Approximation and Calculation of Correction Terms (with B.L.G. Bakker), in Few-Body Problems in Nulcear and Particle Physics, ed.: R.J. Slobodrian (Quebec 1975), p. 5O9.

  29. Influence of the Higher Partial Waves of Local Potentials on Three- Nucleon Observables (with E.O. Alt), in Few-Body Problems in Nuclear and Particle Physics, ed.: R.J. Slobodrian (Quebec 1975), p. 511.

  30. Dynamical Equations and Approximation Methods, in: Few Body Dynamics, ed.: A.N. Mitra et al. (Amsterdam 1976), p. 540.

  31. K Operators and Unitary Approximations for the Three-Body Problem (with D.J. Kouri and F.S. Levin), Phys. Rev. C5, 1825 (1976).

  32. Coulomb Corrections in Proton-Deuteron Scattering (with E.O. Alt, H. Zankel and H. Ziegelmann), Phys. Rev. Lett. 37, 1537 (1976).

  33. Dependence of Four-Body Observables on the Range of Effective Interactions like those of the Unitary Pole Approximation (with R. Perne), Phys. Rev. Lett. 39, 788 (1977).

  34. Coulomb Effects in Three-Body Reactions with Two Charged Particles (with E.O. Alt and H. Ziegelmann), Phys. Rev. C17, 1981 (1978).

  35. Two-Dimensional Integral Equation Solution of the Four-Nucleon System (with H. Kröger), Phys. Rev. Lett. 40, 834 (1978).

  36. General Concepts of Multichannel Collision Theory and Their Translation into the Matrix Formulation of Few-Body Integral Equations, in: Few- Body Nuclear Physics, (IAEA, Wien 1978), p. 3.

  37. Application of the Quasiparticle Formalism to Neutron-Deuteron Scattering with Local Soft-Core Nucleon-Nucleon Potentials (with E.O. Alt), Phys. Rev. C18, 1088 (1978).

  38. Solution of Four-Nucleon Integral Equations using the Effective UPA (with R. Perne), in: Few Body Systems and Nuclear Forces I, ed.: H. Zingl et al. (Berlin 1978), p. 263.

  39. Time Dependent Approach to the Collision of Two Charged Composite Particles (with E.O. Alt), in: Few Body Systems and Nuclear Forces I, ed.: H. Zingl et al. (Berlin 1978), p. 373.

  40. Scattering Amplitudes for Two Charged Fragments (with E.O. Alt), in: Few Body Systems and Nuclear Forces I, ed.: H. Zingl et al. (Berlin 1978), p. 375.

  41. Phase Shifts and Cross Sections Obtained in the Generalized UPA Treatment of Four Nucleon Integral Equations (with R. Perne), unpublished.

  42. Pion-Deuteron Scattering in a Three Body K-Matrix Formalism (with W. Böttger and A.V. Lagu), Birmingham, 1979.

  43. Integral Equations for N-Body Transition Operators and Related Two- Fragment Scattering Amplitudes, in: Proceedings of the International Symposium on Few Particle Problems in Nuclear Physics, Dubna, USSR, 1979, p. 151.

  44. Scattering Amplitudes and Integral Equations for the Collision of Two Charged Composite Particles (with E.O. Alt), Phys. Rev. C21, 1733 (1980).

  45. Quasiparticle Effects in the Two-Body Photodisintegration of He (with W. Böttger and A. Casel), Physics Letters 92B, 11 (1980).

  46. Pole Approximations in Few Body Systems (with A. Casel and H. Haberzettl), Sesimbra, Portugal, June 1980.

  47. Pole Approximations in Few Body Systems (with A. Casel and H. Haberzettl), in: Proceedings of the Ninth International Conference on the Few Body Problem, Eugene, USA, 1980, p. 163.

  48. Photodisintegration of He at Low Energies (with A. Casel), in: Proceedings of the Ninth International Conference on the Few Body Problem, Eugene, USA, 1980, p. 33.

  49. Effective Two-Body Equations for the Four-Body Problem with Exact Treatment of (2+2)-Subsystem Contributions (with H. Haberzettl), Phys. Rev. C24, 359 (1981).

  50. Unitary Pole Approximations and Expansions in Few-Body Systems (with A. Casel and H. Haberzettl), Phys. Rev. C25, 1738 (1982).

  51. Separable Pole Expansions in Four-Nucleon Bound State Calculations (with H. Fiedeldey, H. Haberzettl, and S.A. Sofianos), Phys. Rev. C26, 228 (1982).

  52. Four-Nucleon Scattering in the K-Matrix Approximation (with H.Fiedeldey and S.A. Sofianos), in: Few Body Problems in Physics, Vol.II, ed.: B. Zeitnitz (Amsterdam 1984), p. 429.

  53. The He Charge Form Factor: A Simple Theoretical Approach (with E.A. Bartnik and H. Haberzettl), in: Few Body Problems in Physics, Vol.II, ed.: B. Zeitnitz (Amsterdam 1984), p. 279.

  54. First Order Quasiparticle Calculations for Electron-Hydrogen Collisions (with E.O. Alt and H. Bürger), in: Few Body Problems in Physics, Vol. II, ed.: B. Zeitnitz (Amsterdam 1984), p. 707.

  55. Electron-Hydrogen Quasiparticle Calculations with Polarization Effect (with H. Bürger), in: Few Body Problems in Physics, Vol.II, ed.: B. Zeitnitz (Amsterdam 1984), p. 709.

  56. Does n-d Doublet Scattering Show Any Indication of the Efimov Effect Near the Three-Body Threshold? (with V.S. Bhasin), in: Few Body Problems in Physics, Vol.II, ed.: B. Zeitnitz (Amsterdam 1984), p. 365.

  57. The He Charge Form Factor: A Simple Explicit Formula (with E.A. Bart- nik and H. Haberzettl), in: Collective Motion and Giant Resonances, ed.: Z. Wilhelmi et al., Warsaw, 1983.

  58. Triad of Homogeneous and Inhomogeneous Three-Particle Lippmann- Schwinger Equations (with F.S. Levin), Phys. Rev. C29, 1617 (1984).

  59. Quasiparticle Integral Equations for the Electron-Hydrogen System (with E.O. Alt and H. Bürger), Phys. Rev. A30, 2965 (1984).

  60. Electron-Hydrogen Quasiparticle Calculations Including the Polarization Effect (with H. Bürger), Phys. Rev. A33, 2284 (1986).

  61. Calculation of Proton-Deuteron Phase Parameters Including the Coulomb Force (with E.O. Alt and H. Ziegelmann), Nucl. Phys. A445, 429 (1985).

  62. Four-Nucleon Scattering in the K-Matrix Approach with Improved Treatment of the (2+2) Channels (with H. Fiedeldey and S.A. Sofianos), Phys. Rev. C32, 400 (1985).

  63. Photodisintegration of He Including Exchange Currents (with A. Casel), Czech. J. Phys. B36, 300 (1986).

  64. The Two-Body Bound State Problem and Non-Singular Scattering Equations (with E.A. Bartnik and H. Haberzettl), in: Proceedings of the X. European Symposium on the Dynamics of Few-Body Systems, Balatonfüred, Hungary, 1985, p. 169.

  65. Electron Hydrogen Calculations Combining Close Coupling and Integral Equation Methods (with W. Oehm), in: Proceedings of the X. European Symposium on the Dynamics of Few-Body Systems, Balatonfred, Hungary, 1985, p. 319.

  66. Conference Summary in: Proceedings of the X. European Symposium on the Dynamics of Few-Body Systems, Balatonfüred, Hungary, 1985, p. 433.

  67. Foundations of Faddeev-AGS Theory, in: Few-Body Methods: Principles & Applications, ed.: T.-K. Lim et al. (Singapore 1986), p. 3.

  68. Four-Body Calculation of the Breakup Reaction He(p,pd) H (with H. Fiedeldey and T.E. Mdlalose), Phys. Rev. C33, 784 (1986).

  69. Deuteron on Deuteron H(d,nd)p Break-up in the AGS Formalism (with T.E. Mdlalose and H. Fiedeldey), Nuclear Physics A457, 273 (1986).

  70. Four-Nucleon Break-up Reactions, in: Proceedings of the Internat. Work- shop on Few-Body Approaches to Nuclear Reactions in Tandem and Cyclotron Energy Regions, Tokyo, Japan, 1986, ed.: S. Oryu and T. Sawada (Singapore 1986), p. 37.

  71. Comment on "Triad of Three-Particle Lippmann-Schwinger Equations" (with F.S. Levin), Phys. Rev. C34, 1140 (1986).

  72. The Triad of Three-Particle Lippmann-Schwinger Equations (with F.S. Levin), in: Contributions "XI. International Conference on Few Body Systems in Particle and Nuclear Physics", Tokyo and Sendai, 1986, ed.: T. Sasakawa et al. (Tohoku 1986), p. 182.

  73. Photodisintegration of He Including Exchange Currents (with H. Fiedeldey and S.A. Sofianos), in: Contributions "XI. International Conference on Few Body Systems in Particle and Nuclear Physics", Tokyo and Sendai, 1986, ed.: T. Sasakawa et al. (Tohoku 1986), p. 356.

  74. Competing Quasi Two-Body Processes in Four-Nucleon Break-up (with H. Fiedeldey and T.E. Mdlalose), in: Contributions "XI. International Conference on Few Body Systems in Particle and Nuclear Physics, Tokyo and Sendai, 1986, ed.: T. Sasakawa et al.(Tohoku 1986), p. 366.

  75. Conference Summary of the XI. Internat. Conference on Few Body Systems in Particle and Nuclear Physics, Tokyo and Sendai, Japan, 1986, Nucl. Phys. A463, 531c (1987).

  76. Integral Equation Approach to Few-Body Collision Problems, in Proceedings of the European Workshop on Few-Body Physics, Rome, Oct. 7-11, 1986, ed.: C. Ciofi degli Atti et al [Few-Body Systems, Suppl. 1, 64 (1986)].

  77. The Two-Body Bound State Problem and Non-Singular Scattering Equations (with E.A. Bartnik and H. Haberzettl), Phys. Rev. C34, 1520 (1986).

  78. Comment on a Recent Two-Body Model and Its Three-Body Implications (with H. Haberzettl), Phys. Lett. B178, 335 (1986).

  79. Neutron-Deuteron Scattering Calculations with W-Matrix Representation of the Two-Body Input (with E.A. Bartnik, H. Haberzettl, Th. Januschke, and U. Kerwarth), Phys. Rev. C36, 1678 (1987).

  80. Recent Few-Body Calculations Including Break-up and Photodisintegration Processes, in: Proceedings of the International Conference on the Theory of Few Body and Quark-Hadronic Systems, Dubna, USSR, 1987, p.55.

  81. Neutron-Deuteron Scattering Calculations with Optimal Separable Two-Body Input (with E.A. Bartnik, H. Haberzettl, Th. Januschke, and U. Kerwath), in Proceedings of the XIth European Conference on Few-Body Physics, Fontevraud, Aug. 31 - Sep. 5, 1987, ed.: J.-L. Ballot and M. Fabre de la Ripelle [Few-Body Systems, Suppl. 2, 524 (1987)].

  82. Conference Summary in Proceedings of the XIth European Conference on Few-Body Physics, Fontevraud, Aug. 31 - Sep. 5, 1987, ed.: J.-L. Ballot and M. Fabre de la Ripelle [Few-Body Systems, Suppl. 2, 560 (1987)].

  83. Deuteron on Deuteron Break-up in Regions Characterized by Competing Mechanisms (with T.E. Mdlalose and H. Fiedeldey), Nuclear Physics A480, 215 (1988).

  84. Equations of Motion Using the Dynamical Evolution of the Runge-Lenz Vector (with E.A. Bartnik and H. Haberzettl), The Astrophysical Journal 334, 517 (1988).

  85. Neutron-Deuteron Breakup Calculations with W-Matrix Representation of the Two-Body Input (with T.N. Frank, H. Haberzettl, Th. Januschke, and U. Kerwath), Phys. Rev. C38, 1112 (1988).

  86. Elastic Scattering, Break-up, and Photodisintegration Processes in Few- Body Systems, in: Proceedings of the International Workshop on Micro- scopic Methods in Few-Body Systems Theory, Kalinin, USSR, 1988, p. 16O.

  87. Photodisintegration of the α-Particle: Integral Equation Approach (with S.A. Sofianos, H. Fiedeldey, and H. Haberzettl), in: Proceedings of the International Workshop on Microscopic Methods in Few-Body Systems Theory, Kalinin, USSR, 1988, p. 155.

  88. Two-Fragment Photodisintegration of the α Particle (with S.A. Sofianos, H. Fiedeldey, and H. Haberzettl), in: Contributed Papers, IV. International Symposium on Mesons and Light Nuclei, Bechyne Castle, CSSR, 1988, ed.: R. Mach et al., p. 176.

  89. An improved Plane-Wave Approximation for Photodisintegration Amplitudes (with Ch. von Ferber and H. Haberzettl), in: Proceedings of the 12th International Conference on Few Body Problems in Physics, Vancouver, Canada, 1989, p. G24.

  90. Calculating Deuteron Photodisintegration Amplitudes Using Nonsingular Scattering Equations (with Ch. von Ferber and H. Haberzettl), Phys. Rev. C40, 1923 (1989).

  91. How Well Does the Four Body Calculation Describe the He(p,pd)p Reaction? (with I. Slaus, M.B. Epstein, D.L. Shannon, T.E. Mdlalose, and H. Fiedeldey), in: Proceedings of the 12th International Conference on Few Body Problems in Physics, Vancouver, Canada, 1989, p. B19.

  92. Proton-Induced Break-up of He at 35MeV (with I. Slaus, M.B. Epstein, T.E. Mdlalose and H. Fiedeldey), Nucl. Phys. A515, 57 (1990).

  93. Comment on "Unified Treatment of Bound-State and Scattering Problems" (with E.A. Bartnik and H. Haberzettl), Phys. Rev. C41, 398 (1990).

  94. Electron-Hydrogen Quasiparticle Calculations with Temkin-Lamkin Polarization Potential (with H. Bürger and W. Oehm), Phys. Rev. A42, 6560 (199O).

  95. Recent Results in Nuclear and Atomic Few-Body Theory, Proc. XIIth European Few-Body Conference, Uzhgorod, USSR, 1990.

  96. Formation Probability of the ( Be pμ)-Molecule (with V.B. Belyaev and V.E. Kuzmichev), Muon Catalyzed Fusion 5/6, 185 (1990/91).

  97. Photospaltung des Tritons (with G. Reiss, T.N. Frank and H. Leeb), Fachtagung ÖPG, 1991.

  98. Muonic Molecules of Light Nuclei (with V.B. Belyaev, M. Decker, H. Haberzettl and L.J. Khaskilevitch), Proc. XIIIth European Few-Body Conference, Elba, 1991, ed.: C. Ciofi degli Atti [Few-Body Systems, Suppl. 6, 332 (1992)].

  99. Three-Nucleon Break-up Processes (with T.N. Frank and H. Haberzettl), Proc. XIIIth European Few-Body Conference, Elba, 1991, ed.: C. Ciofi degli Atti [Few-Body Systems, Suppl. 6, 270 (1992)].

  100. Photodisintegration of He (with S.A. Sofianos and H. Fiedeldey), Proc. XIIIth European Few-Body Conference, Elba, 1991, ed.: C. Ciofi degli Atti [Few-Body Systems, Suppl. 6, 276 (1992)].

  101. Neutron-Deuteron Break-up Collisions (with T.N. Frank and H. Haberzettl), in Contrib. XIIIth Internat. Few-Body Conference, Adelaide (Australia), 1992, p. 320.

  102. Determination of the Neutron-Neutron Scattering Length a (with K. Gebhardt, W. Jäger, E. Finckh, T.N. Frank, Th. Januschke and H. Haberzettel), in Contrib. XIIIth Internat. Few-Body Conference, Adelaide (Australia), 1992, p. 152.

  103. The g + He L n + He(p + H) Reaction (with S.A. Sofianos, and H. Fiedeldey), in Contrib. XIIIth Internat. Few-Body Conference, Adelaide (Australia), 1992, p. 266.

  104. Photodisintegration of He in the Integrodifferential Equation Approach (with S.A. Sofianos and H. Fiedeldey), Proc. National Conference on Physics of Few-Body and Quark-Hadronic Systems, Kharkov, Ukraine (1992).

  105. Integral and Integrodifferential Equation Approach to Helium Photodisintegration (with S.A. Sofianos and H. Fiedeldey), Proc. International Workshop on Few-Body Problems in Low-Energy Physics, Alma-Ata, Kazakhstan (1992).

  106. Summary and Concluding Remarks, International Workshop on Few-Body Problems in Low-Energy Physics, Alma-Ata, Kazakhstan (1992).

  107. Photodisintegration of He in the Integrodifferential Equation Approach (with S.A. Sofianos and H. Fiedeldey), Phys. Rev. C48, 2285 (1993).

  108. Neutron-deuteron scattering calculations with the Paris potential using the W-matrix representation of the two-body input (with Th. Januschke, T.N. Frank and H. Haberzettl), Phys. Rev. C47, 1401 (1993).

  109. Experimental and Theoretical Investigations of the H(n,nnp) Reaction and of the Neutron-Neutron Scattering Length (with K. Gebhardt, W. Jäger, C. Jeitner, M. Vitz, E. Finckh, T.N. Frank, Th. Januschke and H. Haberzettl), Nucl. Phys. A561, 232 (1993).

  110. Integral Equation Calculations for the Photodisintegration Process He(γ,n) He (with S.A. Sofianos, H. Fiedeldey and G. Ellerkmann), Phys. Rev. C53, 2638 (1996).