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NSR database version of April 11, 2024.

Search: Author = S.J.Wallace

Found 42 matches.

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2008WA19      Phys.Rev. C 78, 044604 (2008)

S.J.Wallace, J.A.Tjon

Coulomb corrections in quasi-elastic scattering: Tests of the effective-momentum approximation

NUCLEAR REACTIONS 56Fe, 208Pb(e, e'), E=500, 800 MeV; calculated σ, longitudinal and transverse response functions using eikonal distorted waves.

doi: 10.1103/PhysRevC.78.044604
Citations: PlumX Metrics


2006TJ01      Phys.Rev.C 74, 064602 (2006)

J.A.Tjon, S.J.Wallace

Coulomb corrections in quasielastic scattering based on the eikonal expansion for electron wave functions

NUCLEAR REACTIONS 208Pb(e, e'X), E=500 MeV; 208Pb(e+, e+'X), E=540 MeV; calculated longitudinal response functions, eikonal expansion, Coulomb corrections.

doi: 10.1103/PhysRevC.74.064602
Citations: PlumX Metrics


2005PH01      Phys.Rev. C 72, 014006 (2005)

D.R.Phillips, S.J.Wallace, N.K.Devine

Electron-deuteron scattering in the equal-time formalism: Beyond the impulse approximation

NUCLEAR REACTIONS 2H(e, e'X), E=high; calculated form factors, structure functions, polarization observables. Three-dimensional formalism, comparison with data.

doi: 10.1103/PhysRevC.72.014006
Citations: PlumX Metrics


2001WA29      Nucl.Phys. A689, 167c (2001)

S.J.Wallace

Role of Relativity and Nucleon Compositeness in Few-Body Systems

doi: 10.1016/S0375-9474(01)00831-4
Citations: PlumX Metrics


2000TJ01      Phys.Rev. C62, 065202 (2000)

J.A.Tjon, S.J.Wallace

Transition from Hadronic to Partonic Interactions for a Composite Spin-1/2 Model of a Nucleon

NUCLEAR STRUCTURE 1H; calculated electromagnetic form factors. Fermion-boson composite nucleon model.

doi: 10.1103/PhysRevC.62.065202
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1999OR04      Phys.Rev. C59, 1708 (1999)

M.Ortalano, C.E.Bell, S.J.Wallace, R.B.Thayyullathil

Momentum-Space Analysis of Relativistic Two-Body Equations with Confining Interactions: Stability considerations

doi: 10.1103/PhysRevC.59.1708
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1999VA18      Phys.Rev. C60, 064618 (1999)

B.I.S.van der Ventel, G.C.Hillhouse, P.R.De Kock, S.J.Wallace

Polarization Transfer Observables for Quasielastic Proton-Nucleus Scattering in Terms of a Complete Lorentz Invariant Representation of the NN Scattering Matrix

NUCLEAR REACTIONS 40Ca(polarized p, p'), E=500 MeV; calculated analyzing power, spin transfer observables. Complete Lorentz invariant representation of scattering matrix. Comparison with data.

doi: 10.1103/PhysRevC.60.064618
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1998PH02      Phys.Rev. C58, 2261 (1998)

D.R.Phillips, S.J.Wallace, N.K.Devine

Electron-Deuteron Scattering in a Current-Conserving Description of Relativistic Bound States: Formalism and impulse approximation calculations

NUCLEAR REACTIONS 2H(e, e), E not given; calculated deuteron form factor, tensor polarization. Equal-time formalism, conserved current.

NUCLEAR STRUCTURE 2H; calculated form factor. Equal-time formalism, conserved current.

doi: 10.1103/PhysRevC.58.2261
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1998WA07      Nucl.Phys. A631, 137c (1998)

S.J.Wallace

Role of Relativity in Few-Body Systems

doi: 10.1016/S0375-9474(98)00020-7
Citations: PlumX Metrics


1997DU13      Phys.Rev. C56, 2992 (1997)

P.C.Dulany, S.J.Wallace

Relativistic Three-Body Bound States and the Reduction from Four to Three Dimensions

doi: 10.1103/PhysRevC.56.2992
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1997PH02      Phys.Rev. C55, 1937 (1997)

D.R.Phillips, M.C.Birse, S.J.Wallace

Low-Energy Interaction of Composite Spin-Half Systems with Scalar and Vector Fields

doi: 10.1103/PhysRevC.55.1937
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1996PH01      Phys.Rev. C54, 507 (1996)

D.R.Phillips, S.J.Wallace

Relativistic Bound-State Equations in Three-Dimensions

doi: 10.1103/PhysRevC.54.507
Citations: PlumX Metrics


1996WA03      Phys.Rev. C53, 860 (1996)

S.J.Wallace, F.Gross, J.A.Tjon

Scalar and Vector Interactions of a Composite Spin-1/2 System

doi: 10.1103/PhysRevC.53.860
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1995DE21      Phys.Rev. C51, 3222 (1995)

N.K.Devine, S.J.Wallace

Instant Two-Body Equation in Breit Frame

doi: 10.1103/PhysRevC.51.3222
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1995WA08      Phys.Rev.Lett. 74, 228 (1995)

S.J.Wallace, F.Gross, J.A.Tjon

Low-Energy Theorem for Scalar and Vector Interactions of a Composite Spin-1/2 System

doi: 10.1103/PhysRevLett.74.228
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1994KE03      Phys.Rev. C49, 1315 (1994)

J.J.Kelly, S.J.Wallace

Comparison between Relativistic and Nonrelativistic Models of the Nucleon-Nucleon Effective Interaction. I. Normal-Parity Isoscalar Transitions

NUCLEAR REACTIONS 16O, 40Ca(polarized p, p), (polarized p, p'), E=200, 318, 500 MeV; analyzed σ(θ), analyzing power vs θ. Relativistic, nonrelativistic effective interaction models comparison.

doi: 10.1103/PhysRevC.49.1315
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1993DE22      Phys.Rev. C48, R973 (1993)

N.K.Devine, S.J.Wallace

Electromagnetic Scattering from Relativistic Bound States

NUCLEAR REACTIONS 2H(e, e), E not given; calculated magnetic form factor; deduced rest frame wave functions boosting dependence. Quasipotential formalism.

doi: 10.1103/PhysRevC.48.R973
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1993FU04      Phys.Rev. C47, 2812 (1993)

R.J.Furnstahl, S.J.Wallace

Effective Interaction for Inelastic Proton Scattering Based on the Relativistic Impulse Approximation

NUCLEAR REACTIONS 40Ca(polarized p, p), E=300 MeV; analyzed σ(θ), polarization, spin rotation parameter vs θ. Relativistic impulse approximation, density dependent effective interaction.

doi: 10.1103/PhysRevC.47.2812
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1991MA03      Phys.Rev. C43, 1378 (1991)

K.M.Maung, F.Gross, J.A.Tjon, L.W.Townsend, S.J.Wallace

Relativistic Proton-Nucleus Scattering and One-Boson-Exchange Models

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200-500 MeV; analyzed σ(θ), analyzing power, spin rotation parameter vs θ. Relativistic approach.

doi: 10.1103/PhysRevC.43.1378
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1991OT01      Phys.Rev. C43, 2393 (1991)

N.Ottenstein, E.E.van Faassen, J.A.Tjon, S.J.Wallace

Off-Shell Effects in Elastic Scattering of Protons by Nuclei

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200, 500 MeV; calculated σ(θ), analyzing power, spin rotation function vs θ. Relativistic, no-pair approaches, off-shell effects.

doi: 10.1103/PhysRevC.43.2393
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1991TJ01      Phys.Rev. C44, 1156 (1991)

J.A.Tjon, S.J.Wallace

Boost, Recoil, and Wigner Rotation Effects on No-Pair Analyses of Proton Elastic Scattering

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200 MeV; calculated σ(θ), polarization observables vs θ.

doi: 10.1103/PhysRevC.44.1156
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1990OT02      Phys.Rev. C42, R1825 (1990)

N.Ottenstein, E.E.van Faassen, J.A.Tjon, S.J.Wallace

Relativistic Off-Shell Analysis of Elastic Scattering of 200 MeV Protons by 40Ca

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200 MeV; analyzed σ(θ), polarization, spin rotation parameter data. Relativistic off-shell analysis.

doi: 10.1103/PhysRevC.42.R1825
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1989GR12      Phys.Rev. C40, R10 (1989)

F.Gross, Khin Maung Maung, J.A.Tjon, L.W.Townsend, S.J.Wallace

Pseudoscalar πN Coupling and Relativistic Proton-Nucleus Scattering

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200 MeV; measured σ(θ), analyzing power vs θ, spin rotation parameter vs θ. Relativistic approach, pseudoscalar π-nucleon coupling.

doi: 10.1103/PhysRevC.40.R10
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1988OT04      Phys.Rev. C38, 2272 (1988)

N.Ottenstein, S.J.Wallace, J.A.Tjon

Elastic Scattering of Protons by 16O, 40Ca, and 208Pb at 200, 500, and 800 MeV: Relativistic and nonrelativistic analyses based on the impulse approximation

NUCLEAR REACTIONS 16O, 40Ca, 208Pb(polarized p, p), E=200, 500, 800 MeV; measured σ(θ), analyzing power, spin rotation function vs θ. Relativistic, nonrelativistic impulse approximation.

doi: 10.1103/PhysRevC.38.2272
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1988OT05      Phys.Rev. C38, 2289 (1988)

N.Ottenstein, S.J.Wallace, J.A.Tjon

Elastic Scattering of Protons by 16O, 40Ca, and 208Pb at 200, 500, and 800 MeV: Effects of vacuum polarization and Pauli-blocking corrections

NUCLEAR REACTIONS 40Ca, 208Pb(polarized p, p), E=200, 500, 800 MeV; calculated σ(θ), analyzing power, spin rotation function vs θ. Dirac impulse approximation, vacuum polarization, Pauli blocking.

doi: 10.1103/PhysRevC.38.2289
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1987OT02      Phys.Rev. C35, 369 (1987)

N.A.Ottenstein, J.Sabutis, S.J.Wallace

Recoil Effects in the Coordinate Space Dirac Equation

NUCLEAR REACTIONS 16O(p, p), E=500 MeV; calculated σ(θ), analyzing power spin observables vs θ. Coordinate space Dirac equation, recoil corrections.

doi: 10.1103/PhysRevC.35.369
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1987OT04      Phys.Lett. 197B, 493 (1987)

N.Ottenstein, S.J.Wallace, J.A.Tjon

Vacuum Polarization Effects in Elastic Scattering of Protons by Nuclei

NUCLEAR REACTIONS 40Ca, 208Pb(polarized p, p), E=500 MeV; calculated σ(θ), analyzing power, spin rotation function vs θ; deduced vacuum polarization role. Dirac model.

doi: 10.1016/0370-2693(87)91040-9
Citations: PlumX Metrics


1987TJ01      Phys.Rev. C35, 280 (1987)

J.A.Tjon, S.J.Wallace

Symmetric, Lorentz Invariant NN Amplitude: Yukawa Representation

NUCLEAR REACTIONS 1H(n, n), (p, p), E=200, 500, 800 MeV; calculated invariant amplitudes; deduced Feynman invariant amplitudes. Relativistic meson exchange model, Yukawa representation.

doi: 10.1103/PhysRevC.35.280
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1987TJ03      Phys.Rev. C36, 1085 (1987)

J.A.Tjon, S.J.Wallace

Generalized Impulse Approximation for Relativistic Proton Scattering

NUCLEAR REACTIONS 40Ca(p, p), (polarized p, p), E=200, 500, 800 MeV; calculated σ(θ), analyzing power, spin rotation parameter vs θ. Generalized impulse approximation.

doi: 10.1103/PhysRevC.36.1085
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1986GU10      Phys.Rev. C34, 648 (1986)

S.A.Gurvitz, J.A.Tjon, S.J.Wallace

y Scaling and Final State Interactions in 3He(e, e')X

NUCLEAR REACTIONS 3H(e, e'X), E not given; calculated scaling functions; deduced final state interaction dependence. 3He deduced n, p momentum distribution. Faddeev formalism.

doi: 10.1103/PhysRevC.34.648
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1985PI10      Phys.Rev. C32, 1312 (1985)

A.Picklesimer, J.W.Van Orden, S.J.Wallace

Final State Interactions and Relativistic Effects in the (e(pol), e'p) Reaction

NUCLEAR REACTIONS 16O(e, e'p), E not given; calculated response functions for Ep=135 MeV. Relativistic effects, final state interactions, DWIA.

doi: 10.1103/PhysRevC.32.1312
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1985SM06      Phys.Rev. C32, 1654 (1985)

R.D.Smith, S.J.Wallace

Spin Observables in Quasi-Elastic Proton-Nucleus Scattering near 1 GeV

NUCLEAR REACTIONS 12C(polarized p, p'), E=800 MeV; calculated σ(θ) vs proton momentum, analyzing power, other polarization observables vs θ. Glauber multiple scattering theory including spin, multiple knockout collisions.

doi: 10.1103/PhysRevC.32.1654
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1985TJ01      Phys.Rev.Lett. 54, 1357 (1985)

J.A.Tjon, S.J.Wallace

Meson Theory of the Dirac Impulse Approximation

NUCLEAR REACTIONS 40Ca(p, p), (polarized p, p), E=181 MeV; calculated σ(θ), analyzing power vs θ. Dirac impulse approximation, meson theory.

doi: 10.1103/PhysRevLett.54.1357
Citations: PlumX Metrics


1984WA03      Phys.Rev. C29, 956 (1984)

S.J.Wallace, J.L.Friar

Approximate Dirac Scattering Amplitudes: Eikonal expansion

NUCLEAR REACTIONS 40Ca(polarized p, p), E=300, 500, 800 MeV; calculated σ(θ), analyzing power, spin rotation vs θ. Dirac scattering amplitudes, eikonal expansions.

doi: 10.1103/PhysRevC.29.956
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1983MC04      Phys.Rev. C27, 2123 (1983)

J.A.McNeil, L.Ray, S.J.Wallace

Impulse Approximation NN Amplitudes for Proton-Nucleus Interactions

NUCLEAR REACTIONS 40Ca(p, p), E=800 MeV; calculated σ(θ). 40Ca(polarized p, p), E=500 MeV; calculated analyzing power vs θ. Impulse approximation, invariant nucleon-nucleon amplitudes.

doi: 10.1103/PhysRevC.27.2123
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1983SH05      Phys.Rev.Lett. 50, 1443 (1983)

J.R.Shepard, J.A.McNeil, S.J.Wallace

Relativistic Impulse Approximation for p-Nucleus Elastic Scattering

NUCLEAR REACTIONS 40Ca(polarized p, p), E=500 MeV; calculated σ(θ), analyzing power vs θ. Impulse approximation, Dirac optical potential.

doi: 10.1103/PhysRevLett.50.1443
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1980AL12      Phys.Rev.Lett. 44, 1579 (1980)

Y.Alexander, J.W.Van Orden, E.F.Redish, S.J.Wallace

Do Quasifree Reaction Mechanisms Explain Reaction Cross Sections in Intermediate-Energy Proton-Nucleus Scattering < Question >

NUCLEAR REACTIONS 12C(p, p'), E=800 MeV; calculated inclusive proton spectra. PWIA, quasifree nucleon knockout, isobar production.

doi: 10.1103/PhysRevLett.44.1579
Citations: PlumX Metrics


1980BA12      Phys.Rev. C21, 1996 (1980)

M.K.Banerjee, S.J.Wallace

Local Field Corrections in π-Nucleus Scattering

NUCLEAR REACTIONS 16O(π, π), E=50-250 MeV; calculated local field correction; deduced mechanisms contributing to imaginary component. Nucleus-π optical potential, recoil effects.

doi: 10.1103/PhysRevC.21.1996
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1980WA06      Phys.Lett. 90B, 346 (1980)

S.J.Wallace, Y.Alexander

Correlation Effects and 1.05 GeV p-4He Elastic Scattering

NUCLEAR REACTIONS 4He(p, p), E=1.05 GeV; calculated σ(θ), P(θ). Multiple diffraction approximation, intermediate isobar.

doi: 10.1016/0370-2693(80)90945-4
Citations: PlumX Metrics


1977WA06      Phys.Rev.Lett. 38, 1269 (1977)

S.J.Wallace, Y.Alexander

Elastic p-4He Scattering Near 1 GeV

NUCLEAR REACTIONS 1H(α, α), E=1.029 GeV; calculated polarization.

doi: 10.1103/PhysRevLett.38.1269
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1975WA16      Phys.Rev. C12, 179 (1975)

S.J.Wallace

High-Energy Expansion for Nuclear Multiple Scattering

NUCLEAR REACTIONS 4He(p, p), E=1.05 GeV; calculated σ(θ).

doi: 10.1103/PhysRevC.12.179
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1970WA33      Phys.Rev. C2, 1738 (1970)

S.J.Wallace, K.R.Knuth, R.H.Davis

Optical-Model Analysis of Alpha-Particle Scattering by 36Ar from 12.83 To 17.83 MeV

NUCLEAR REACTIONS 36Ar(α, α), E=12.83-17.83 MeV; measured σ(E;θ); deduced optical model parameters.

doi: 10.1103/PhysRevC.2.1738
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