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NSR database version of April 11, 2024.

Search: Author = P.Wilhelm

Found 25 matches.

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1998AR05      Nucl.Phys. A631, 612c (1998)

H.Arenhovel, G.Kress, R.Schmidt, P.Wilhelm

On the Gerasimov-Drell-Hearn Sum Rule for the Deuteron

doi: 10.1016/S0375-9474(98)00077-3
Citations: PlumX Metrics

1998SC13      Nucl.Phys. A631, 583c (1998)

M.Schwamb, H.Arenhovel, P.Wilhelm, Th.Wilbois

Explicit Pionic Degrees of Freedom in Deuteron Photodisintegration in the Δ-Resonance Region

NUCLEAR REACTIONS 2H(γ, p), E=200-440 MeV; calculated total σ, σ(θ), photon asymmetries. Retarded potentials, coupled channels approach. Comparison with data.

doi: 10.1016/S0375-9474(98)00071-2
Citations: PlumX Metrics

1998SC17      Phys.Lett. 420B, 255 (1998)

M.Schwamb, H.Arenhovel, P.Wilhelm, Th.Wilbois

Meson Retardation in Deuteron Photodisintegration Above π-Threshold

NUCLEAR REACTIONS 2H(γ, n), E=200-440 MeV; analyzed σ(θ), σ; deduced meson retardation role.

doi: 10.1016/S0370-2693(97)01532-3
Citations: PlumX Metrics

1998WI03      Phys.Rev. C57, 295 (1998)

Th.Wilbois, P.Wilhelm, H.Arenhovel

Extraction of Electromagnetic Properties of the Δ(1232) Excitation from Pion Photoproduction

doi: 10.1103/PhysRevC.57.295
Citations: PlumX Metrics

1997AR16      Phys.Lett. 407B, 1 (1997)

H.Arenhovel, G.Kress, R.Schmidt, P.Wilhelm

The Spin Response of the Deuteron and Its Implication for the Gerasimov-Drell-Hearn Sum Rule

NUCLEAR REACTIONS 2H(γ, X), E ≤ 550 MeV; calculated pion production photodisintegration σ. Gerasimov-Drell-Hearn sum rule.

doi: 10.1016/S0370-2693(97)00697-7
Citations: PlumX Metrics

1997PE08      Phys.Rev.Lett. 78, 4011 (1997)

A.Pellegrino, H.Arenhovel, H.P.Blok, D.van Dierendonck, G.E.Dodge, W.H.A.Hesselink, E.Jans, N.Kalantar-Nayestanaki, W.-J.Kasdorp, L.Lapikas, J.J.van Leeuwe, W.Leidemann, A.Misiejuk, C.J.G.Onderwater, G.van der Steenhoven, R.Starink, J.J.M.Steijger, J.A.Templon, J.L.Visschers, T.Wilbois, P.Wilhelm, H.W.Willering, D.M.Yeomans

Deuteron Electrodisintegration in the Δ-Resonance Region

NUCLEAR REACTIONS 2H(e, e'p), E=525 MeV; measured σ(θ(e), θ(np)) vs electron momentum, transverse-transverse interference structure function; deduced Δ excitation role dominance.

doi: 10.1103/PhysRevLett.78.4011
Citations: PlumX Metrics

1997WI14      Phys.Rev. C56, R1215 (1997)


Unitarity Constraint for Threshold Coherent Pion Photoproduction on the Deuteron

NUCLEAR REACTIONS 2H(γ, π0), E not given; calculated reaction amplitudes; deduced absorptive two-step process role.

doi: 10.1103/PhysRevC.56.R1215
Citations: PlumX Metrics

1997WI26      Z.Phys. A359, 467 (1997)

P.Wilhelm, H.Arenhovel, C.Giusti, F.D.Pacati

Treatment of the Δ Current in Electromagnetic Two-Nucleon Knockout Reactions

NUCLEAR REACTIONS 16O(γ, 2p), E=50-400 MeV; calculated σ(E, θ); deduced Δ-current dependence.

doi: 10.1007/s002180050428
Citations: PlumX Metrics

1996SC23      Z.Phys. A355, 421 (1996)

R.Schmidt, H.Arenhovel, P.Wilhelm

Quasifree Pion Photoproduction on the Deuteron in the Δ Region

NUCLEAR REACTIONS 1n(γ, π-), 1H(γ, π+), (γ, π0), E=threshold-500 MeV; 2H(γ, π-p), (γ, π+n), (γ, π0p), E=threshold-500 MeV; calculated σ(E). 2H(γ, π-p), E=250-350 MeV; calculated σ(θ). Spectator nucleon model, quasifree pion photoproduction.

doi: 10.1007/s002180050132
Citations: PlumX Metrics

1996WI03      Nucl.Phys. A597, 613 (1996)

P.Wilhelm, J.A.Niskanen, H.Arenhovel

Signatures from Polarization Observables for Photon Absorption on a 1S0 Proton Pair

doi: 10.1016/0375-9474(95)00458-0
Citations: PlumX Metrics

1996WI13      Phys.Rev. C54, 1423 (1996)

P.Wilhelm, Th.Wilbois, H.Arenhovel

Unitary Ambiguity in the Extraction of the E2/M1 Ratio for the γN → Δ Δ → γN Transition

doi: 10.1103/PhysRevC.54.1423
Citations: PlumX Metrics

1996WI19      Nucl.Phys. A609, 469 (1996)

P.Wilhelm, H.Arenhovel

Rescattering Effects in Coherent Pion Photoproduction on the Deuteron in the Δ Resonance Region

NUCLEAR REACTIONS 2H(π, π), E=142-254 MeV; calculated σ(θ). 2H(γ, π0), (polarized γ, π0), E=200-440 MeV; calculated σ(E), σ(θ), photon, tensor target asymmetry. Dynamical model, rescattering effects.

doi: 10.1016/S0375-9474(96)00277-1
Citations: PlumX Metrics

1996WI21      Phys.Rev. C54, 3311 (1996)

Th.Wilbois, P.Wilhelm, H.Arenhovel

Comment on ' Multinucleon Mechanisms in (γ, N) and (γ, NN) Reactions '

NUCLEAR REACTIONS 2H(γ, X), E=200-400 MeV; calculated photodisintegration σ vs E; deduced Δ-propagation associated ansatz related features.

doi: 10.1103/PhysRevC.54.3311
Citations: PlumX Metrics

1995BL13      Phys.Rev. C52, R455 (1995)

G.Blanpied, M.Blecher, A.Caracappa, C.Djalali, M.-A.Duval, G.Giordano, K.Hicks, S.Hoblit, M.Khandaker, O.C.Kistner, G.Matone, L.Miceli, W.K.Mize, B.M.Preedom, D.Rebreyend, A.M.Sandorfi, C.Schaerf, R.M.Sealock, C.E.Thorn, S.T.Thornton, K.Vaziri, C.S.Whisnant, X.Zhao, P.Wilhelm, H.Arenhovel, and the LEGS Collaboration

New Measurements of 2H(polarized γ, p)n and Spin Problems in Coupled NΔ/NN Interactions

NUCLEAR REACTIONS, ICPND 2H(polarized γ, p), E=113-315 MeV; measured σ(θ) vs E, σ(E). Tagged beam. NΔ/NN coupled-channel analysis.

doi: 10.1103/PhysRevC.52.R455
Citations: PlumX Metrics

1995NI07      Nucl.Phys. A586, 693 (1995)

J.A.Niskanen, P.Wilhelm, H.Arenhovel

Quasifree Photoabsorption on Neutron-Proton Pairs in 3He

NUCLEAR REACTIONS 3He(γ, np), (polarized γ, np), E=200-400 MeV; calculated photoabsorption σ(E), σ(θp), proton polarization, analyzing power, asymmetry vs θ. Quasifree absorption, nucleonic, meson exchange currents, Δ(1232)-isobar excitation.

doi: 10.1016/0375-9474(95)00037-2
Citations: PlumX Metrics

1995NI13      Phys.Lett. 359B, 295 (1995)

J.A.Niskanen, P.Wilhelm

Pion vs. Photon Absorption on the Deuteron

NUCLEAR REACTIONS 2H(π+, p), E not given; calculated absorption σ vs pion momentum. 2H(γ, n), E=140-440 MeV; calculated photodisintegration σ(E).

doi: 10.1016/0370-2693(95)01105-Y
Citations: PlumX Metrics

1995SC58      Few-Body Systems 19, 121 (1995)

M.Schwamb, H.Arenhovel, P.Wilhelm

Role of the D13 and S11 Resonances in Deuteron Photodisintegration

NUCLEAR REACTIONS 2H(γ, p), E ≤ 800 MeV; analyzed σ(θ), proton polarization vs θ; deduced D13, S11 resonances role.

doi: 10.1007/s006010050021
Citations: PlumX Metrics

1995WI14      Phys.Rev.Lett. 74, 1034 (1995)

P.Wilhelm, H.Arenhovel, J.A.Niskanen

Comment on ' Total Cross Section for Photon Absorption by Two Protons in 3He '

NUCLEAR REACTIONS 3He(γ, X), E ≈ 200-500 MeV; analyzed, reanalyzed σ(E) data analyses; deduced nonnegligible E1 multipole contribution.

doi: 10.1103/PhysRevLett.74.1034
Citations: PlumX Metrics

1995WI16      Phys.Rev. C51, 2841 (1995)

P.Wilhelm, J.A.Niskanen, H.Arenhovel

Photon Absorption on a Proton-Proton Pair in 3He

NUCLEAR REACTIONS 3He(γ, 2p), E=100-500 MeV; analyzed σ(E); deduced various multipole contributions, photon absorption mechanism, Δ role. Different models.

doi: 10.1103/PhysRevC.51.2841
Citations: PlumX Metrics

1995WI22      Nucl.Phys. A593, 435 (1995)

P.Wilhelm, H.Arenhovel

Coherent Pion Photoproduction on the Deuteron in the Δ Resonance Region

NUCLEAR REACTIONS 2H(γ, π0), E ≈ 200-400 MeV; calculated coherent pion production σ(E), σ(θ). 2H(polarized γ, π0), (γ, π0), E=300 MeV; calculated photon asymmetry, target vector, tensor asymmetry vs θ. Time-ordered perturbation theory based nonrelativistic model, no rescattering.

doi: 10.1016/0375-9474(95)00348-5
Citations: PlumX Metrics

1994WI12      Phys.Lett. 335B, 109 (1994)

P.Wilhelm, J.A.Niskanen, H.Arenhovel

Photon Absorption on a Neutron-Proton Pair in 3He

NUCLEAR REACTIONS 3He(γ, np), E=245 MeV; calculated σ(θ); deduced spectator role importance. Quasifree two-body model.

doi: 10.1016/0370-2693(94)91399-4
Citations: PlumX Metrics

1993WI20      Phys.Lett. 318B, 410 (1993)

P.Wilhelm, H.Arenhovel

Photodisintegration of the Deuteron in the Δ-Resonance Region

NUCLEAR REACTIONS, ICPND 2H(γ, p), (polarized γ, p), E=140-500 keV; calculated σ vs E, σ(θp), neutron, proton polarization vs θ. Final state interactions, NN-NΔ coupled channels approach, pion degrees of freedom.

doi: 10.1016/0370-2693(93)91532-R
Citations: PlumX Metrics

1992DE04      Phys.Rev. C45, 860 (1992)

A.De Graeve, R.Van de Vyver, A.Zieger, C.Van den Abeele, L.Van Hoorebeke, D.Ryckbosch, H.Ferdinande, F.De Smet, B.Ziegler, P.Wilhelm, H.Arenhovel

Absolute Total Cross Sections for Deuteron Photodisintegration between 7 and 19 MeV

NUCLEAR REACTIONS 2H(γ, p), E=7-19 MeV; measured σ(E, θ), θ=0°, 90°, 180°; deduced absolute total photodisintegration σ.

doi: 10.1103/PhysRevC.45.860
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0949.

1991SC31      Few-Body Systems 10, 105 (1991)

K.-M.Schmitt, P.Wilhelm, H.Arenhovel

Deuteron Photodisintegration at Low Energies

NUCLEAR REACTIONS 2H(γ, p), E < 40 MeV; analyzed σ(θ), other data. Conventional model analysis.

doi: 10.1007/BF01083045
Citations: PlumX Metrics

1990SC04      Phys.Rev. C41, 841 (1990)

K.-M.Schmitt, P.Wilhelm, H.Arenhovel, A.Cambi, B.Mosconi, P.Ricci

Gauge Dependence of Nonrelativistic Calculations of Deuteron Photodisintegration

NUCLEAR REACTIONS 2H(γ, p), (γ, n), E=30-140 MeV; calculated photodisintegration σ(θ); deduced gauge dependence. Nonrelativistic model.

doi: 10.1103/PhysRevC.41.841
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