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Search: Author = J.Ahrens

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2013BA28      Phys.Lett. B 723, 71 (2013)

P.A.Bartolome, A.Mushkarenkov, J.Ahrens, J.R.M.Annand, H.-J.Arends, R.Beck, V.Bekrenev, H.Berghauser, A.Braghieri, W.J.Briscoe, S.N.Cherepnya, S.Costanza, P.Drexler, L.V.Filkov, A.Fix, G.Giardina, D.I.Glazier, D.Hamilton, E.Heid, W.Heil, D.Hornidge, D.Howdle, I.Jaegle, O.Jahn, T.Jude, V.L.Kashevarov, I.Keshelashvili, R.Kondratiev, M.Korolija, J.Krimmer, B.Krusche, S.Kruglov, A.Kulbardis, V.Lisin, K.Livingston, J.Mancell, D.G.Middleton, I.J.D.MacGregor, D.M.Manley, J.C.McGeorge, V.Metag, B.M.K.Nefkens, A.Nikolaev, M.Oberle, M.Ostrick, H.Ortega, P.B.Otte, B.Oussena, P.Pedroni, F.Pheron, S.Prakhov, A.Polonski, F.Rigamonti, M.Romaniuk, G.Rosner, T.Rostomyan, S.Schumann, D.Sober, A.Starostin, I.Supek, M.Thiel, A.Thomas, M.Unverzagt, D.Watts, D.Werthmuller

First measurement of the helicity dependence of 3He photoreactions in the Δ(1232) resonance region

NUCLEAR REACTIONS 3He(γ, X), (γ, π0), (γ, π+), (γ, π-), (γ, 2p), E=150-500 MeV; measured reaction products, Eγ, Iγ; deduced total σ, unpolarized σ, polarized σ. Large acceptance Crystal Ball spectrometer.

doi: 10.1016/j.physletb.2013.04.057
Citations: PlumX Metrics


2012PH03      Phys.Lett. B 709, 21 (2012)

F.Pheron, J.Ahrens, J.R.M.Annand, H.J.Arends, K.Bantawa, P.A.Bartolome, R.Beck, V.Bekrenev, H.Berghauser, B.Boillat, A.Braghieri, D.Branford, W.J.Briscoe, J.Brudvik, S.Cherepnya, B.Demissie, M.Dieterle, E.J.Downie, P.Drexler, D.I.Glazier, E.Heid, L.V.Filkov, D.Hornidge, D.Howdle, O.Jahn, I.Jaegle, T.C.Jude, V.L.Kashevarov, I.Keshelashvili, R.Kondratiev, M.Korolija, M.Kotulla, A.Kulbardis, S.P.Kruglov, B.Krusche, V.Lisin, K.Livingston, I.J.D.Macgregor, Y.Maghrbi, J.Mancell, D.M.Manley, Z.Marinides, M.Martinez, J.C.Mcgeorge, E.Mcnicoll, D.Mekterovic, V.Metag, S.Micanovic, D.G.Middleton, A.Mushkarenkov, B.M.K.Nefkens, A.Nikolaev, R.Novotny, M.Oberle, M.Ostrick, B.Oussena, P.Pedroni, A.Polonski, S.N.Prakhov, J.Robinson, G.Rosner, T.Rostomyan, S.Schumann, M.H.Sikora, D.I.Sober, A.Starostin, I.Supek, M.Thiel, A.Thomas, M.Unverzagt, D.P.Watts, D.Werthmuller, L.Witthauer, F.Zehr

Coherent photoproduction of η-mesons off 3He - search for η-mesic nuclei

NUCLEAR REACTIONS 3He(γ, η), E=597.8-695.1 MeV; measured products, 3He; deduced σ, σ(E), σ(θ). Data were imported from EXFOR entry G0031.

doi: 10.1016/j.physletb.2012.01.075
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetG0031.


2011AH01      Eur.Phys.J. A 47, 36 (2011)

J.Ahrens, S.Altieri, J.R.M.Annand, H.-J.Arends, R.Beck, M.A.Blackston, C.Bradtke, A.Braghieri, N.D'Hose, H.Dutz, A.Fix, E.Heid, O.Jahn, F.Klein, R.Kondratiev, M.Lang, V.Lisin, M.Martinez-Fabregate, J.C.McGeorge, W.Meyer, A.Panzeri, P.Pedroni, T.Pinelli, D.Protopopescu, G.Reicherz, Ch.Rohlof, G.Rosner, T.Rostomyan, D.Ryckbosch, G.Tamas, A.Thomas, H.R.Weller, for the GDH and A2 Collaborations

Measurement of the helicity-dependent total cross-section for the γn → pπ-π0 reaction

NUCLEAR REACTIONS 2H(γ, p), E=450-800 MeV; measured γ spectra, γ(proton)-, γ(charged-particle)-coin, charged-particle spectra using the DAPHNE detector with incident circularly polarized γ, longitudinally polarized deuterons; deduced unpolarized and polarized γn to pπ+π0 σ. Comparison with previous data and calculations.

doi: 10.1140/epja/i2011-11036-1
Citations: PlumX Metrics


2010AH02      Eur.Phys.J. A 44, 189 (2010)

J.Ahrens, S.Altieri, J.R.M.Annand, H.-J.Arends, R.Beck, M.A.Blackston, C.Bradtke, A.Braghieri, N.d'Hose, H.Dutz, A.Fix, E.Heid, O.Jahn, F.Klein, R.Kondratiev, M.Lang, V.Lisin, M.Martinez-Fabregate, J.C.McGeorge, W.Meyer, A.Panzeri, P.Pedroni, T.Pinelli, D.Protopopescu, G.Reicherz, Ch.Rohlof, G.Rosner, T.Rostomyan, D.Ryckbosch, M.Schwamb, G.Tamas, A.Thomas, H.R.Weller,

Helicity dependence of the γd → πNN reactions in the Δ -resonance region

NUCLEAR REACTIONS 2H(γ, πX), E=301-455 MeV; 2H(polarized γ, πX), E=307-451 MeV; measured yields, σ(θ), helicity-dependent σ(θ) with polarized beam; deduced reaction mechanism features. Comparison with other data and various models.

doi: 10.1140/epja/i2010-10946-6
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0808.


2010YE11      Nucl.Instrum.Methods Phys.Res. A 618, 160 (2010)

O.Yevetska, S.Watzlawik, J.Ahrens, G.D.Alkhazov, V.P.Chizhov, E.M.Maev, P.Von Neumann-Cosel, E.M.Orischin, G.E.Petrov, J.-M.Porte, A.Richter, V.V.Sarantsev, G.Schrieder, Yu.V.Smirenin

New experimental method for investigation of the nucleon polarizabilities

NUCLEAR REACTIONS 1H(γ, γ), E=32.4-51.4 MeV; measured products, Eπ, Iπ; deduced σ(θ). Data were imported from EXFOR entry M0804.

doi: 10.1016/j.nima.2010.02.091
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0804.


2008MC05      Eur.Phys.J. A 37, 129 (2008)

J.C.McGeorge, J.D.Kellie, J.R.M.Annand, J.Ahrens, I.Anthony, A.Clarkson, D.J.Hamilton, P.S.Lumsden, E.F.McNicoll, R.O.Owens, G.Rosner, A.Thomas

Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C

doi: 10.1140/epja/i2008-10606-0
Citations: PlumX Metrics


2007AH08      Eur.Phys.J. A 34, 11 (2007)

J.Ahrens, and the GDH and A2 Collaborations

First measurement of the helicity dependence for the γp → pπ+ π- reaction

doi: 10.1140/epja/i2007-10491-5
Citations: PlumX Metrics


2007BL20      Eur.Phys.J. A 32, 219 (2007)

F.Bloch, J.Ahrens, J.R.M.Annand, R.Beck, L.S.Fog, D.Hornidge, S.Janssen, M.Kotulla, B.Krusche, J.C.McGeorge, I.J.D.MacGregor, J.G.Messchendorp, V.Metag, R.Novotny, R.O.Owens, M.Pfeiffer, M.Rost, R.Sanderson, S.Schadmand, A.Thomas, D.P.Watts

Double pion photoproduction off 40Ca

doi: 10.1140/epja/i2006-10383-2
Citations: PlumX Metrics


2006AH05      Phys.Rev. C 74, 045204 (2006)

J.Ahrens, and the GDH- and A-2 Collaborations

Measurement of the helicity dependence for the γp → nπ channel in the second resonance region

NUCLEAR REACTIONS 1H(polarized γ, π+), E=450-790 MeV; measured σ, σ(θ), polarization observables.

doi: 10.1103/PhysRevC.74.045204
Citations: PlumX Metrics


2006AH06      Phys.Rev.Lett. 97, 202303 (2006); Erratum Phys.Rev.Lett. 98, 039901 (2007)

J.Ahrens, and the GDH and A2 Collaborations

Measurement of the Gerasimov-Drell-Hearn Integrand for 2H from 200 to 800 MeV

NUCLEAR REACTIONS 2H(polarized γ, X), (polarized γ, πX), E=200-800 MeV; measured polarized and unpolarized photoabsorption σ; deduced Gerasimov-Drell-Hearn sum rule contribution. Polarized target.

doi: 10.1103/PhysRevLett.97.202303
Citations: PlumX Metrics


2006RE16      Eur.Phys.J. A 30, 461 (2006)

A.Reiter, P.S.Lumsden, J.Ahrens, J.R.M.Annand, R.Beck, J.C.McGeorge, R.O.Owens

A microscope for the Glasgow photon tagging spectrometer in Mainz

doi: 10.1140/epja/i2006-10130-9
Citations: PlumX Metrics


2005AH01      Eur.Phys.J. A 23, 113 (2005)

J.Ahrens, V.M.Alexeev, J.R.M.Annand, H.J.Arends, R.Beck, G.Caselotti, S.N.Cherepnya, D.Drechsel, L.V.Filkov, K.Fohl, I.Giller, P.Grabmayr, T.Hehl, D.Hornidge, V.L.Kashevarov, M.Kotulla, D.Krambrich, B.Krusche, M.Lang, J.C.McGeorge, I.J.D.MacGregor, V.Metag, M.Moinester, R.Novotny, M.Pfeiffer, M.Rost, S.Schadmand, S.Scherer, A.Thomas, C.Unkmeir, Th.Walcher

Measurement of the π+-meson polarizabilities via the γp → γπ+n reaction

NUCLEAR REACTIONS 1H(γ, π+γ), E=537-817 MeV; measured Eγ, En, (pion)nγ-coin, σ(θ); deduced pion polarizabilities. Tagged photon beam, comparison with model predictions.

doi: 10.1140/epja/i2004-10056-2
Citations: PlumX Metrics


2005AH05      Phys.Lett. B 624, 173 (2005)

J.Ahrens, and the GDH and A2 Collaborations

Intermediate resonance excitation in the γp → pπ0π0 reaction

NUCLEAR REACTIONS 1H(polarized γ, 2π0), E=400-800 MeV; measured unpolarized and helicity-dependent σ. Polarized target.

doi: 10.1016/j.physletb.2005.08.034
Citations: PlumX Metrics


2005AH07      Eur.Phys.J. A 26, 135 (2005)

J.Ahrens, S.Altieri, J.R.M.Annand, H.-J.Arends, R.Beck, A.Braghieri, N.d'Hose, H.Dutz, S.Goertz, P.Grabmayr, S.Hasegawa, E.Heid, H.Holvoet, L.Van Hoorebeke, N.Horikawa, T.Iwata, O.Jahn, P.Jennewein, R.Kondratiev, J.Krimmer, M.Lang, B.Lannoy, K.Livingston, J.C.McGeorge, W.Meyer, A.Panzeri, P.Pedroni, T.Pinelli, I.Preobrajenski, G.Reicherz, G.Rosner, M.Rost, T.Rostomyan, D.Ryckbosch, M.Schumacher, B.Seitz, G.Tamas, A.Thomas, R.van de Vyver, Th.Walcher, F.Zapadtka

Measurement of the G asymmetry for the γp → Nπ channels in the Δ(1232) resonance region

NUCLEAR REACTIONS 1H(polarized γ, π0), (polarized γ, π+), e ≈ 340 MeV; measured σ(θ), G asymmetries, related polarization observables. Polarized target.

doi: 10.1140/epja/i2005-10158-3
Citations: PlumX Metrics


2004AH09      Eur.Phys.J. A 21, 323 (2004)

J.Ahrens, and the GDH and A2 Collaborations

Helicity dependence of the γp → Nπ channels and multipole analysis in the Δ region

NUCLEAR REACTIONS 1H(γ, π+), (γ, π0), E=180-540 MeV; measured polarized and unpolarized σ(θ), σ; deduced helicity dependence, resonance features.

doi: 10.1140/epja/i2003-10216-x
Citations: PlumX Metrics


2004KO01      Phys.Lett. B 578, 63 (2004)

M.Kotulla, J.Ahrens, J.R.M.Annand, R.Beck, D.Hornidge, S.Janssen, B.Krusche, J.C.McGeorge, I.J.D.MacGregor, J.G.Messchendorp, V.Metag, R.Novotny, M.Pfeiffer, R.O.Owens, M.Rost, S.Schadmand, D.P.Watts

Double π0 photoproduction off the proton at threshold

NUCLEAR REACTIONS 1H(γ, 2π0), E=300-425 MeV; measured invariant mass spectra, σ(θ), σ. Tagged photons. Comparison with model predictions.

doi: 10.1016/j.physletb.2003.10.056
Citations: PlumX Metrics


2004KO11      Eur.Phys.J. A 19, 391 (2004)

K.Kossert, M.Camen, F.Wissmann, J.Ahrens, J.R.M.Annand, H.-J.Arends, R.Beck, G.Caselotti, P.Grabmayr, O.Jahn, P.Jennewein, M.I.Levchuk, A.I.L'vov, J.C.McGeorge, A.Natter, V.Olmos de Leon, V.A.Petrunkin, G.Rosner, M.Schumacher, B.Seitz, F.Smend, A.Thomas, W.Weihofen, F.Zapadtka

Quasi-free π0 photoproduction from the bound nucleon

NUCLEAR REACTIONS 2H(γ, π0n), (γ, π0p), E=200-400 MeV; 1H(γ, π0), E=200-400 MeV; measured σ(E, θ). 1n(γ, π0), E=300 MeV; deduced quasifree σ(θ).

doi: 10.1140/epja/i2003-10130-3
Citations: PlumX Metrics


2004KR16      Eur.Phys.J. A 22, 277 (2004)

B.Krusche, J.Lehr, J.Ahrens, J.R.M.Annand, R.Beck, F.Bloch, L.S.Fog, D.Hornidge, S.Janssen, M.Kotulla, J.C.McGeorge, I.J.D.MacGregor, J.Messchendorp, V.Metag, U.Mosel, R.Novotny, R.O.Owens, M.Pfeiffer, R.Sanderson, S.Schadmand, D.P.Watts

Photoproduction of π0-mesons from nuclei

NUCLEAR REACTIONS 12C, 40Ca, 93Nb, 208Pb(γ, π0X), E=200-800 MeV; measured missing-energy and missing-mass spectra, σ, σ(E, θ); deduced in-medium effects. Tagged photons, comparison with model predictions, previous results.

doi: 10.1140/epja/i2004-10033-9
Citations: PlumX Metrics


2004PF01      Phys.Rev.Lett. 92, 252001 (2004); Comment Phys.Rev.Lett. 94, 049101 (2005)

M.Pfeiffer, J.Ahrens, J.R.M.Annand, R.Beck, G.Caselotti, S.Cherepnya, K.Fohl, L.S.Fog, D.Hornidge, S.Janssen, V.Kashevarov, R.Kondratiev, M.Kotulla, B.Krusche, J.C.McGeorge, I.J.D.MacGregor, K.Mengel, J.G.Messchendorp, V.Metag, R.Novotny, M.Rost, S.Sack, R.Sanderson, S.Schadmand, A.Thomas, D.P.Watts

Photoproduction of η-Mesic 3He

NUCLEAR REACTIONS 3He(γ, X), E=600-820 MeV; measured η-meson production σ, σ(θ); deduced resonance structure. 3He deduced quasibound η-mesic state energy, width.

doi: 10.1103/PhysRevLett.92.252001
Citations: PlumX Metrics


2003AH01      Phys.Lett. 551B, 49 (2003)

J.Ahrens, S.Altieri, J.R.M.Annand, G.Anton, H.-J.Arends, K.Aulenbacher, R.Beck, C.Bradtke, A.Braghieri, N.Degrande, N.d'Hose, H.Dutz, S.Goertz, P.Grabmayr, K.Hansen, J.Harmsen, D.von Harrach, S.Hasegawa, T.Hasegawa, E.Heid, K.Helbing, H.Holvoet, L.Van Hoorebeke, N.Horikawa, T.Iwata, O.Jahn, P.Jennewein, T.Kageya, B.Kiel, F.Klein, R.Kondratiev, K.Kossert, J.Krimmer, M.Lang, B.Lannoy, R.Leukel, V.Lisin, T.Matsuda, J.C.McGeorge, A.Meier, D.Menze, W.Meyer, T.Michel, J.Naumann, A.Panzeri, P.Pedroni, T.Pinelli, I.Preobrajenski, E.Radtke, E.Reichert, G.Reicherz, Ch.Rohlof, G.Rosner, T.Rostomyan, C.Rovelli, D.Ryckbosch, M.Sauer, B.Schoch, M.Schumacher, B.Seitz, T.Speckner, N.Takabayashi, G.Tamas, A.Thomas, R.van de Vyver, A.Wakai, W.Weihofen, F.Wissmann, F.Zapadtka, G.Zeitler, and the GDH and A2 Collaborations

Helicity dependence of the γ(pol)p(pol) → nπ+π0 reaction in the second resonance region

NUCLEAR REACTIONS 1H(polarized γ, π+π0), E=400-800 MeV; measured σ, helicity dependence; deduced resonance features. Polarized target.

doi: 10.1016/S0370-2693(02)03008-3
Citations: PlumX Metrics


2003AH04      Eur.Phys.J. A 17, 241 (2003)

J.Ahrens, and the GDH and A2 Collaborations

First measurement of the helicity-dependent (γ(pol)p(pol)) → pη differential cross-section

NUCLEAR REACTIONS 1H(polarized γ, X), E=780-790 MeV; measured η production associated excitation function, helicity-dependent σ(θ). Tagged photon beam, polarized target.

doi: 10.1140/epja/i2002-10153-2
Citations: PlumX Metrics


2003KO08      Eur.Phys.J. A 16, 259 (2003)

K.Kossert, M.Camen, F.Wissmann, J.Ahrens, J.R.M.Annand, H.-J.Arends, R.Beck, G.Caselotti, P.Grabmayr, O.Jahn, P.Jennewein, M.I.Levchuk, A.I.L'vov, J.C.McGeorge, A.Natter, V.Olmos de Leon, V.A.Petrun'kin, G.Rosner, M.Schumacher, B.Seitz, F.Smend, A.Thomas, W.Weihofen, F.Zapadtka

Quasi-free Compton scattering and the polarizabilities of the neutron

NUCLEAR REACTIONS 1H(γ, γ'), E=200-400 MeV; 2H(γ, γ'n), (γ, γ'p), E=200-400 MeV; measured Eγ, Ep, En, σ(E, θ). 1n(γ, γ'), E=200-400 MeV; deduced σ(E, θ). 1n deduced polarizabilities. Tagged photons.

doi: 10.1140/epja/i2002-10093-9
Citations: PlumX Metrics


2003WA01      Phys.Lett. B 553, 25 (2003)

D.P.Watts, J.Ahrens, J.R.M.Annand, R.Beck, D.Branford, P.Grabmayr, T.Hehl, J.D.Kellie, I.J.D.MacGregor, J.C.McGeorge, R.O.Owens

Three-nucleon mechanisms in photoreactions

NUCLEAR REACTIONS 12C(γ, 2np), E=150-800 MeV; measured Ep, missing energy distributions; deduced possible three-nucleon mechanism, other reaction mechanism features. Tagged photons. Comparison with microscopic many-body model predictions.

doi: 10.1016/S0370-2693(02)03186-6
Citations: PlumX Metrics


2002BR38      Phys.Rev. C66, 015208 (2002)

D.Branford, J.F.Arneil, J.A.MacKenzie, K.Fohl, J.Ahrens, J.R.M.Annand, R.Beck, S.Franczuk, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, J.D.Kellie, M.Liang, I.J.D.MacGregor, J.C.McGeorge, A.Natter, S.Oberkirsch, R.O.Owens, C.J.Y.Powrie, D.P.Watts, S.Wunderlich

Investigation of Δ-Medium Effects using the 4He(γ, π+n)3H and 4He(γ, π+p)nnn Reactions

NUCLEAR REACTIONS 4He(γ, π+n), (γ, π+p), E=250-400 MeV; measured missing energy, σ(E, θ) with polarized and unpolarized beams; 12C(γ, π+n), E=260-380 MeV; analyzed data; deduced Δ-medium effects. Tagged photons, comparisons with model predictions.

doi: 10.1103/PhysRevC.66.015208
Citations: PlumX Metrics


2002CA13      Phys.Rev. C65, 032202 (2002)

M.Camen, K.Kossert, F.Wissmann, J.Ahrens, H.-J.Arends, R.Beck, G.Caselotti, P.Grabmayr, P.D.Harty, O.Jahn, P.Jennewein, R.Kondratiev, M.I.Levchuk, V.Lisin, A.I.Lvov, J.C.McGeorge, A.Natter, V.Olmos de Leon, M.Schumacher, B.Seitz, F.Smend, A.Thomas, W.Weihofen, F.Zapadtka

Backward Spin Polarizability γπ of the Proton

NUCLEAR REACTIONS 1H(γ, γ), E=200-470 MeV; measured Compton scattering σ(θ=136°), pγ-coin. 1H deduced backward spin polarizability. Comparisons with model predictions, previous results.

doi: 10.1103/PhysRevC.65.032202
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0730.


2002HE08      Eur.Phys.J. A 13, 493 (2002)

V.Hejny, J.Weiss, P.Achenbach, J.Ahrens, J.R.M.Annand, R.Beck, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, I.J.D.MacGregor, V.Metag, R.Novotny, V.Olmos de Leon, F.Rambo, A.Schmidt, M.Schumacher, U.Siodlaczek, H.Stroher, F.Wissmann, M.Wolf

Threshold Enhancement in η Photoproduction from 2H and 4He

NUCLEAR REACTIONS 2H, 4He(γ, X), E ≈ 590-680 MeV; measured η meson production σ, σ(θ), momentum distributions; deduced enhancement relative to model prediction. Tagged photons.

doi: 10.1007/s10050-002-8779-0
Citations: PlumX Metrics


2002KO21      Phys.Rev.Lett. 88, 162301 (2002)

K.Kossert, M.Camen, F.Wissmann, J.Ahrens, J.R.M.Annand, H.-J.Arends, R.Beck, G.Caselotti, P.Grabmayr, O.Jahn, P.Jennewein, M.I.Levchuk, A.I.Lvov, J.C.McGeorge, A.Natter, V.Olmos de Leon, V.A.Petrunkin, G.Rosner, M.Schumacher, B.Seitz, F.Smend, A.Thomas, W.Weihofen, F.Zapadtka

Neutron Polarizabilities Investigated by Quasifree Compton Scattering from the Deuteron

NUCLEAR REACTIONS 2H(γ, n), E=200-400 MeV; measured Eγ, nγ-coin. 1n deduced polarizabilities.

doi: 10.1103/PhysRevLett.88.162301
Citations: PlumX Metrics


2002KO59      Phys.Rev.Lett. 89, 272001 (2002)

M.Kotulla, J.Ahrens, J.R.M.Annand, R.Beck, G.Caselotti, L.S.Fog, D.Hornidge, S.Janssen, B.Krusche, J.C.McGeorge, I.J.D.McGregor, K.Mengel, J.G.Messchendorp, V.Metag, R.Novotny, M.Pfeiffer, M.Rost, S.Sack, R.Sanderson, S.Schadmand, D.P.Watts

The Reaction γp → π0γ'p and the Magnetic Dipole Moment of the Δ+(1232) Resonance

NUCLEAR REACTIONS 1H(γ, γ'π0), E(cm)=1221-1331 MeV; measured missing mass, σ(E, θ); deduced Δ resonance dipole moment.

doi: 10.1103/PhysRevLett.89.272001
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2002KR02      Phys.Lett. 526B, 287 (2002)

B.Krusche, J.Ahrens, R.Beck, S.Kamalov, V.Metag, R.O.Owens, H.Stroher

Coherent π0-Photoproduction from Atomic Nuclei

NUCLEAR REACTIONS 12C, 40Ca, 93Nb, Pb(γ, π0), E=200-350 MeV; measured pion spectra, σ(θ), σ; deduced Δ-resonance medium modification. Comparisons with model predictions.

doi: 10.1016/S0370-2693(01)01503-9
Citations: PlumX Metrics


2002ME22      Phys.Rev.Lett. 89, 222302 (2002)

J.G.Messchendorp, S.Janssen, M.Kotulla, J.Ahrens, J.R.H.Annand, R.Beck, F.Bloch, G.Caselotti, L.Fog, D.Hornidge, B.Krusche, W.Langgartner, J.C.McGeorge, I.J.D.MacGregor, K.Mengel, V.Metag, R.Novotny, R.O.Owens, M.Pfeiffer, S.Sack, R.Sanderson, S.Schadmand

In-Medium Modifications of the ππ Interaction in Photon-Induced Reactions

NUCLEAR REACTIONS 1H, 12C, Pb(γ, 2π0X), (γ, π0π+X), (γ, π0π-X), E=400-460 MeV; measured two-pion mass distributions, σ(E); deduced in-medium modification features. Comparison with model predictions.

doi: 10.1103/PhysRevLett.89.222302
Citations: PlumX Metrics


2001AH03      Phys.Rev.Lett. 87, 022003 (2001)

J.Ahrens, and the GDH and A2 Collaborations

First Measurement of the Gerasimov-Drell-Hearn Integral for 1H from 200 to 800 MeV

NUCLEAR REACTIONS 1H(polarized γ, X), E=200-800 MeV; measured total photoabsorption σ, helicity dependence, forward spin polarizability.

doi: 10.1103/PhysRevLett.87.022003
Citations: PlumX Metrics


2001AH07      Acta Phys.Hung.N.S. 14, 13 (2001)

J.Ahrens

Half a Century of Experimental Photonuclear Physics

doi: 10.1556/APH.14.2001.1-4.3
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2001GA28      Phys.Lett. 503B, 245 (2001)

G.Galler, V.Lisin, R.Kondratev, A.M.Massone, S.Wolf, J.Ahrens, H.-J.Arends, R.Beck, M.Camen, G.P.Capitani, P.Grabmayr, S.J.Hall, F.Harter, T.Hehl, P.Jennewein, K.Kossert, A.I.Lvov, C.Molinari, P.Ottonello, J.Peise, I.Preobrajenski, S.Proff, A.Robbiano, M.Sanzone, M.Schumacher, M.Schmitz, F.Wissmann

Compton Scattering by the Proton

NUCLEAR REACTIONS 1H(γ, γ'), E=250-800 MeV; measured recoil proton spectra, γ spectra, σ(θ); deduced multipole ratio for resonance production, proton backward spin polarizability. Tagged photons, large-acceptance spectrometer.

doi: 10.1016/S0370-2693(01)00231-3
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2001OL04      Eur.Phys.J. A 10, 207 (2001)

V.Olmos de Leon, F.Wissmann, P.Achenbach, J.Ahrens, H.-J.Arends, R.Beck, P.D.Harty, V.Hejny, P.Jennewein, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, J.C.McGeorge, V.Metag, R.Novotny, A.Polonsky, F.Rambo, A.Schmidt, M.Schumacher, U.Siodlaczek, H.Stroher, A.Thomas, J.Weiss, M.Wolf

Low-Energy Compton Scattering and the Polarizabilities of the Proton

NUCLEAR REACTIONS 1H(γ, γ'), E=55-165 MeV; measured Eγ, σ(θ). 1H deduced electromagnetic polarizabilities.

doi: 10.1007/s100500170132
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2001PO19      Phys.Rev. C64, 034602 (2001)

C.J.Y.Powrie, J.C.McGeorge, I.J.D.MacGregor, J.Ahrens, J.R.M.Annand, J.F.Arneil, R.Beck, D.Branford, S.Franczuk, D.I.Glazier, P.Grabmayr, S.J.Hall, T.Hehl, P.D.Harty, D.G.Ireland, J.D.Kellie, K.Livingston, F.A.Natter, S.Oberkirsch, R.O.Owens, J.Ryckebusch, M.Sauer, A.Settele, D.P.Watts

Polarized Photon Measurements of the 12C(γ(pol), pp) and 12C(γ(pol), pn) Reactions for Eγ = 160-350 MeV

NUCLEAR REACTIONS 12C(polarized γ, 2p), (polarized γ, np), E=160-350 MeV; measured parallel and perpendicular yields, photon asymmetry, σ(θ), missing energy dependence; deduced reaction mechanism features. Tagged photons. Comparison with model predictions.

doi: 10.1103/PhysRevC.64.034602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0740.


2001SC51      Phys.Rev.Lett. 87, 232501 (2001)

A.Schmidt, P.Achenbach, J.Ahrens, H.J.Arends, R.Beck, A.M.Bernstein, V.Hejny, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, I.J.D.McGregor, J.C.McGeorge, V.Metag, V.M.Olmos de Leon, F.Rambo, U.Siodlaczek, H.Stroher, Th.Walcher, J.Weiss, F.Wissmann, M.Wolf

Test of Low-Energy Theorems for 1H(γ(pol), π0)1H in the Threshold Region

NUCLEAR REACTIONS 1H(polarized γ, π0), E=144-168 MeV; measured σ, σ(θ), photon asymmetry; deduced partial wave amplitudes. Tagged-photon beam.

doi: 10.1103/PhysRevLett.87.232501
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2001SI24      Eur.Phys.J. A 10, 365 (2001)

U.Siodlaczek, P.Achenbach, J.Ahrens, J.R.M.Annand, H.-J.Arends, R.Beck, R.Bilger, H.Clement, V.Hejny, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, J.C.McGeorge, V.Metag, R.Novotny, V.Olmos de Leon, F.Rambo, M.Schepkin, A.Schmidt, I.Seluzhenkov, H.Stroher, G.J.Wagner, Th.Walcher, J.Weiss, F.Wissmann, M.Wolf

Coherent and Incoherent π0 Photoproduction from the Deuteron

NUCLEAR REACTIONS 2H(γ, π0), (γ, π0n), E=140-306 MeV; measured missing energy spectra, σ(θ), σ. Tagged photons.

doi: 10.1007/s100500170120
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2001WE15      Eur.Phys.J. A 11, 371 (2001)

J.Weiss, P.Achenbach, J.Ahrens, J.R.M.Annand, R.Beck, V.Hejny, J.D.Kellie, V.Kleber, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, V.Metag, V.M.Olmos de Leon, F.Rambo, A.Schmidt, U.Siodlaczek, H.Stroher, F.Wissmann, M.Wolf

Exclusive Measurement of Coherent η-Photoproduction from the Deuteron

NUCLEAR REACTIONS 2H(γ, X), E=640-745 MeV; measured σ(θ) for η-photoproduction. Comparison with earlier data and with calculations.

doi: 10.1007/s100500170047
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2001WO09      Nucl.Phys. A690, 310c (2001)

S.Wolf, V.Lisin, R.Kondratiev, A.M.Massone, G.Galler, J.Ahrens, H.-J.Arends, R.Beck, M.Camen, G.P.Capitani, P.Grabmayr, S.J.Hall, F.Harter, T.Hehl, P.Jennewein, K.Kossert, A.I.Lvov, C.Molinari, P.Ottonello, J.Peise, I.Preobrajensky, S.Proff, A.Robbiano, M.Sanzone, M.Schumacher, M.Schmitz, F.Wissmann

Structure of the Nucleon Investigated by Compton Scattering

NUCLEAR REACTIONS 1H(γ, γ'), E ≈ 200-800; measured σ(θ); deduced nucleon structure parameters.

doi: 10.1016/S0375-9474(01)00965-4
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2001WO12      Eur.Phys.J. A 12, 231 (2001)

S.Wolf, V.Lisin, R.Kondratiev, A.M.Massone, G.Galler, J.Ahrens, H.-J.Arends, R.Beck, M.Camen, G.P.Capitani, P.Grabmayr, F.Harter, T.Hehl, P.Jennewein, K.Kossert, A.I.Lvov, C.Molinari, P.Ottonello, R.O.Owens, J.Peise, I.Preobrajensky, S.Proff, A.Robbiano, M.Sanzone, M.Schumacher, M.Schmitz, F.Wissmann

Compton Scattering by the Proton using a Large-Acceptance Arrangement

NUCLEAR REACTIONS 1H(γ, γ), E ≈ 250-800 MeV; measured Eγ, σ(θ); deduced backward spin polarizability. Comparison with model predictions. Tagged photon beam, large-acceptance experiment.

doi: 10.1007/s100500170031
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2000AH04      Phys.Rev.Lett. 84, 5950 (2000)

J.Ahrens, and the GDH and A2 Collaboration

Helicity Dependence of γp → Nπ below 450 MeV and Contribution to the Gerasimov-Drell-Hearn Sum Rule

NUCLEAR REACTIONS 1H(γ, π+), (polarized γ, π+), (polarized γ, π0), E=200-450; measured σ, helicity dependence, contribution to Gerasimov-Drell-Hearn sum rule. Polarized target, tagged photon beam.

doi: 10.1103/PhysRevLett.84.5950
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2000BE05      Phys.Rev. C61, 035204 (2000)

R.Beck, H.P.Krahn, J.Ahrens, J.R.M.Annand, H.J.Arends, G.Audit, A.Braghieri, N.d'Hose, D.Drechsel, O.Hanstein, J.C.McGeorge, R.O.Owens, P.Pedroni, T.Pinelli, G.Tamas, L.Tiator, Th.Walcher

Determination of the E2/M1 Ratio in the γN → Δ(1232) Transition from a Simultaneous Measurement of p(γ(pol), p)π0 and p(γ(pol), π+)n

NUCLEAR REACTIONS 1H(polarized γ, π0), (polarized γ, π+), E=270-420 MeV; measured σ(θ), asymmetry; deduced Δ resonance associated E2/M1 ratio. Tagged photons.

doi: 10.1103/PhysRevC.61.035204
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2000BR01      Phys.Rev. C61, 014603 (2000)

D.Branford, J.A.MacKenzie, F.X.Lee, J.Ahrens, J.R.M.Annand, R.Beck, G.E.Cross, T.Davinson, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, D.G.Johnstone, J.D.Kellie, T.Lamparter, M.Liang, I.J.D.MacGregor, J.C.McGeorge, R.O.Owens, M.Sauer, R.Schneider, A.C.Shotter, K.Spaeth, D.P.Watts, P.J.Woods, L.E.Wright, T.T.Yau

Nuclear Pion Photoproduction in the Δ Resonance Region

NUCLEAR REACTIONS 12C(γ, π+n), E=260, 300, 340, 380 MeV; measured σ(θ1, θ2), missing energy spectra; deduced Δ resonance role. DWIA analysis. Tagged photons.

doi: 10.1103/PhysRevC.61.014603
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2000KL12      Eur.Phys.J. A 9, 1 (2000)

V.Kleber, P.Achenbach, J.Ahrens, R.Beck, V.Hejny, J.D.Kellie, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, V.Metag, R.Novotny, V.Olmos de Leon, R.O.Owens, F.Rambo, A.Schmidt, M.Schumacher, U.Siodlaczek, H.Stroher, J.Weiss, F.Wissmann, M.Wolf

Double-π0 Photoproduction from the Deuteron

NUCLEAR REACTIONS 2H(γ, 2π0X), E=200-820 MeV; measured two-pion production σ, invariant mass distributions. 1n(γ, 2π0X), E=400-820 MeV; deduced two-pion production σ. Tagged photons.

doi: 10.1007/s100500070047
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2000SI10      Nucl.Phys. A663-664, 428c (2000)

U.Siodlaczek, P.Achenbach, J.Ahrens, H.-J.Arends, R.Beck, R.Bilger, H.Clement, V.Hejny, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, V.Metag, R.Novotny, V.Olmos de Leon, F.Rambo, M.Schepkin, A.Schmidt, M.Schumacher, H.Stroher, G.J.Wagner, Th.Walcher, J.Weiss, F.Wissmann, M.Wolf

Measurement of Coherent and Incoherent π0 Photoproduction Off the Deuteron with Tagged Photons Up to the Δ Region

NUCLEAR REACTIONS 2H(γ, π0), E=130-306 MeV; measured pions missing energy spectra, σ(θ). Tagged photons.

doi: 10.1016/S0375-9474(99)00675-2
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2000SI39      Eur.Phys.J. A 9, 309 (2000)

U.Siodlaczek, P.Achenbach, J.Ahrens, H.-J.Arends, R.Beck, R.Bilger, H.Clement, V.Hejny, J.D.Kellie, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, J.C.McGeorge, V.Metag, R.Novotny, V.Olmos de Leon, F.Rambo, M.Schepkin, A.Schmidt, H.Stroher, G.J.Wagner, Th.Walcher, J.Weiss, F.Wissmann, M.Wolf

Search for Narrow Dibaryon Resonances in Neutral Pion Photoproduction from the Deuteron

NUCLEAR REACTIONS 2H(γ, π0), E=140-300 MeV; measured σ(θ, E); deduced absence of resonances in the 2-baryon system.

doi: 10.1007/s100500070015
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2000WA20      Phys.Rev. C62, 014616 (2000)

D.P.Watts, I.J.D.MacGregor, J.Ahrens, J.R.M.Annand, R.Beck, D.Branford, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, J.D.Kellie, T.Lamparter, M.Liang, J.A.MacKenzie, S.J.McAllister, J.C.McGeorge, R.O.Owens, M.Sauer, R.Schneider, G.J.Wagner, T.T.-H.Yau

The 12C(γ, NN) Reaction Studied Over a Wide Kinematic Range

NUCLEAR REACTIONS 12C(γ, np), (γ, 2p), E=150-700 MeV; measured missing energy, recoil momentum distributions; deduced role of short-range correlations, other reaction mechanism features. Tagged photons. Comparisons with model predictions.

doi: 10.1103/PhysRevC.62.014616
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2000WI05      Nucl.Phys. A663-664, 397c (2000)

F.Wissmann, P.Achenbach, J.Ahrens, H.-J.Arends, R.Beck, R.Bilger, M.Camen, G.P.Capitani, G.Caselotti, G.Galler, P.Grabmayr, F.Harter, T.Hehl, E.Heid, V.Hejny, O.Jahn, P.Jennewein, R.Kondratev, K.Kossert, M.Kotulla, B.Krusche, V.Kuhr, M.Lang, R.Leukel, M.I.Levchuk, V.Lisin, A.I.Lvov, A.M.Massone, V.Metag, A.Natter, R.Novotny, V.Olmos de Leon, P.Ottonello, J.Peise, A.Polonsky, I.Preobrashenskij, S.Proff, F.Rambo, A.Robbiano, D.Rosenkranz, M.Sanzone, E.Schilling, A.Schmidt, M.Schumacher, B.Seitz, U.Siodlaczek, F.Smend, H.Stroher, H.Vorwerk, Th.Walcher, J.Weiss, M.Wolf, S.Wolf, F.Zapadtka

Compton Scattering from the Free and Bound Proton Above π-Threshold

NUCLEAR REACTIONS 1,2H(γ, γ'X), E=200-800 MeV; measured σ(θ).

doi: 10.1016/S0375-9474(99)00626-0
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2000WO12      Eur.Phys.J. A 9, 5 (2000)

M.Wolf, J.Ahrens, R.Beck, V.Hejny, J.D.Kellie, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, V.Metag, J.C.Nacher, R.Novotny, V.Olmos de Leon, R.O.Owens, F.Rambo, A.Schmidt, M.Schumacher, U.Siodlaczek, H.Stroher, J.Weiss, F.Wissmann

Photoproduction of Neutral Pion Pairs from the Proton

NUCLEAR REACTIONS 1H(γ, 2π0X), E=300-820 MeV; measured two-pion production σ, invariant mass distributions. Tagged photons.

doi: 10.1007/s100500070048
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1999FR32      Phys.Lett. 450B, 332 (1999)

S.Franczuk, I.J.D.MacGregor, J.Ahrens, J.R.M.Annand, J.F.Arneil, R.Beck, D.Branford, P.Grabmayr, S.J.Hall, T.Hehl, P.D.Harty, D.G.Ireland, J.D.Kellie, K.Livingston, J.C.McGeorge, F.A.Natter, S.Oberkirsch, R.O.Owens, C.J.Y.Powrie, J.Ryckebusch, M.Sauer, A.Settele, D.P.Watts

12C(γ(pol), pn) Photon Asymmetry for Eγ = 180-340 MeV

NUCLEAR REACTIONS 12C(polarized γ, np), E=180-340 MeV; measured proton, neutron spectra, angular distributions; deduced photon asymmetry. Tagged photons. Comparison with deuterium target data.

doi: 10.1016/S0370-2693(99)00184-7
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0739.


1999HE27      Eur.Phys.J. A 6, 83 (1999)

V.Hejny, P.Achenbach, J.Ahrens, R.Beck, S.J.Hall, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, V.Metag, R.Novotny, V.Olmos de Leon, R.O.Owens, F.Rambo, A.Schmidt, M.Schumacher, U.Siodlaczek, H.Stroher, F.Wissmann, J.Weiss, M.Wolf

Near Threshold Photoproduction of η Mesons from 4He

NUCLEAR REACTIONS 4He(γ, X), E=threshold-818 MeV; measured η meson exclusive and inclusive production σ, σ(θ); deduced neutron, proton, coherent contributions. Tagged photons.

doi: 10.1007/s100500050320
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1999KR22      Eur.Phys.J. A 6, 309 (1999)

B.Krusche, J.Ahrens, R.Beck, M.Fuchs, S.J.Hall, F.Harter, J.D.Kellie, V.Metag, M.Robig-Landau, H.Stroher

Single and Double π0-Photoproduction from the Deuteron

NUCLEAR REACTIONS 2H(γ, π0), (γ, π0X), (γ, 2π0), E=200-792 MeV; 1H(γ, π0), E=650-790 MeV; measured σ, σ(θ); deduced final state interaction features. Comparisons with model predictions.

doi: 10.1007/s100500050349
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1999MC06      Phys.Rev. C60, 044610 (1999)

S.J.McAllister, J.C.McGeorge, I.J.D.MacGregor, J.R.M.Annand, S.J.Hall, P.D.Harty, J.D.Kellie, G.J.Miller, R.O.Owens, D.P.Watts, T.T.-H.Yau, D.Branford, J.A.MacKenzie, M.Liang, P.Grabmayr, T.Hehl, T.Lamparter, M.Sauer, R.Schneider, J.Ahrens, R.Beck

The (γ, pd) Reaction in 12C

NUCLEAR REACTIONS 12C(γ, pd), E=150-400 MeV; measured particle spectra, σ(θ), recoil momentum distributions; deduced reaction mechanism features. Tagged photon beam.

doi: 10.1103/PhysRevC.60.044610
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1999RA29      Nucl.Phys. A660, 69 (1999)

F.Rambo, P.Achenbach, J.Ahrens, H.-J.Arends, R.Beck, S.J.Hall, V.Hejny, P.Jennewein, S.S.Kamalov, M.Kotulla, B.Krusche, V.Kuhr, R.Leukel, V.Metag, R.Novotny, V.Olmos de Leon, A.Schmidt, M.Schumacher, U.Siodlaczek, F.Smend, H.Stroher, J.Weiss, F.Wissmann, M.Wolf

Coherent π0 Photoproduction from 4He

NUCLEAR REACTIONS 4He(γ, π0), E=200-400 MeV; measured σ, σ(θ); deduced in-medium modification of Δ resonance parameters. Tagged coherent bremsstrahlung beam, DWIA analysis.

doi: 10.1016/S0375-9474(99)00383-8
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1999WA20      Few-Body Systems 26, 213 (1999)

S.Wartenberg, J.Ahrens, J.Annand, H.J.Arends, G.Audit, R.Beck, A.Braghieri, N.d'Hose, S.Hall, E.Heid, V.Isbert, J.D.Kellie, H.P.Krahn, J.C.McGeorge, R.O.Owens, A.Panzeri, P.Pedroni, T.Pinelli, G.Tamas, A.Thomas

Photon Asymmetry of Deuteron Photodisintegration between 160 and 410 MeV

NUCLEAR REACTIONS 2H(polarized γ, p), E=160-410 MeV; measured σ(θ), photon asymmetry. Comparison with previous data, model predictions. Tagged photon beam.

doi: 10.1007/s006010050115
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1999WI15      Nucl.Phys. A660, 232 (1999)

F.Wissmann, V.Kuhr, O.Jahn, H.Vorwerk, P.Achenbach, J.Ahrens, H.-J.Arends, R.Beck, M.Camen, G.Caselotti, E.Heid, V.Hejny, P.Jennewein, R.Kondratev, K.Kossert, M.Kotulla, B.Krusche, M.Lang, R.Leukel, M.I.Levchuk, V.Lisin, V.Metag, R.Novotny, V.Olmos de Leon, A.Polonsky, I.Preobrashenskij, F.Rambo, D.Rosenkranz, E.Schilling, A.Schmidt, M.Schumacher, B.Seitz, U.Siodlaczek, H.Stroher, A.Thomas, Th.Walcher, J.Weiss, M.Wolf, F.Zapadtka

Compton Scattering from the Free and Bound Proton at Backward Angles Above π-Threshold

NUCLEAR REACTIONS 1H(γ, γ'), E=200-410 MeV; 2H(γ, γ'), E=200-290 MeV; measured Eγ, σ(θ); deduced proton spin polarizabilities. Dispersion theory.

doi: 10.1016/S0375-9474(99)00419-4
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1998HA01      Phys.Rev. C57, 123 (1998)

P.D.Harty, I.J.D.MacGregor, J.Ahrens, J.R.M.Annand, I.Anthony, R.Beck, D.Branford, G.E.Cross, T.Davinson, P.Grabmayr, S.J.Hall, T.Hehl, J.D.Kellie, T.Lamparter, J.A.MacKenzie, J.C.McGeorge, G.J.Miller, R.O.Owens, M.Sauer, R.Schneider, K.Spaeth

Investigation of Multiparticle Final States in 12C Photoreactions

NUCLEAR REACTIONS 12C(γ, np), (γ, 2p), (γ, 3p), (γ, pπ), (γ, 2pπ), E=250-600 MeV; measured σ vs missing energy; deduced reaction mechanism features. Tagged photons. Valencia model calculations.

doi: 10.1103/PhysRevC.57.123
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1998KR13      Phys.Lett. 432B, 45 (1998)

A.Kraus, O.Selke, F.Wissmann, J.Ahrens, H.-J.Arends, R.Beck, G.Galler, M.-Th.Hutt, B.Korfgen, J.Peise, M.Schumacher, F.Smend, R.Wichmann

Angular and Polarization Dependence of Compton Scattering from 4He in the Δ-Resonance Region

NUCLEAR REACTIONS 4He(polarized γ, γ'), E=150-500 MeV; measured σ(Eγ, θ), asymmetry; deduced Δ-hole model failure at large scattering angles. Polarized tagged photons.

doi: 10.1016/S0370-2693(98)00635-2
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1998MA02      Phys.Rev.Lett. 80, 245 (1998)

I.J.D.MacGregor, T.T-H.Yau, J.Ahrens, J.R.M.Annand, R.Beck, D.Branford, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, J.D.Kellie, T.Lamparter, M.Liang, J.A.MacKenzie, S.McAllister, J.C.McGeorge, R.O.Owens, J.Ryckebusch, M.Sauer, R.Schneider, D.P.Watts

Mechanisms in the 12C(γ, pn) and (γ, pp) Reactions

NUCLEAR REACTIONS 12C(γ, np), (γ, 2p), E=120-400 MeV; measured σ(Eγ, θ(p)); deduced Δ-resonance dependence, reaction mechanism features.

doi: 10.1103/PhysRevLett.80.245
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1998RA12      Phys.Rev. C58, 489 (1998)

F.Rambo, J.Ahrens, H.-J.Arends, R.Beck, G.Galler, J.D.Kellie, H.-P.Krahn, A.Kraus, U.Ludwig, J.Peise, A.Schmidt, M.Schumacher, F.Smend, F.Wissmann, S.Wolf

Enhancement of the Linear Polarization of Coherent Bremsstrahlung by Collimation of the Photon Beam

NUCLEAR REACTIONS 4He(polarized γ, π0), E=200-400 MeV bremsstrahlung; analyzed asymmetry; deduced beam polarization, collimation effect. Coherent bremsstrahlung from diamond crystals.

doi: 10.1103/PhysRevC.58.489
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1998YA05      Eur.Phys.J. A 1, 241 (1998)

T.T.-H.Yau, I.J.D.MacGregor, J.Ahrens, J.R.M.Annand, R.Beck, D.Branford, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, D.G.Ireland, J.D.Kellie, T.Lamparter, K.Livingston, M.Liang, J.A.MacKenzie, S.McAllister, J.C.McGeorge, R.O.Owens, M.Sauer, R.Schneider, D.P.Watts

The Angular Distribution of the 12C(γ, pn) Reaction for E(γ) = 120 - 150 MeV

NUCLEAR REACTIONS 12C(γ, np), E=120-150 MeV; measured σ(θ(n), θ(p)); deduced pion-, rho-exchange roles. Comparison with other reactions.

doi: 10.1007/s100500050055
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1997AU02      Nucl.Phys. A614, 461 (1997)

G.Audit, A.Braghieri, N.D'Hose, V.Isbert, S.Kerhoas, J.M.Laget, M.Mac Cormick, L.Y.Murphy, A.Panzeri, P.Pedroni, T.Pinelli, G.Tamas, J.Ahrens, J.R.M.Annand, R.Crawford, P.Grabmayr, S.J.Hall, J.D.Kellie

Study of Three-Nucleon Mechanisms in the Photodisintegration of 3He

NUCLEAR REACTIONS 3He(γ, 2p), E=200-800 MeV; measured σ for three-nucleon absorption mechanisms.

doi: 10.1016/S0375-9474(96)00441-1
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1997BE04      Phys.Rev.Lett. 78, 606 (1997); Erratum Phys.Rev.Lett. 79, 4515 (1997)

R.Beck, H.P.Krahn, J.Ahrens, H.J.Arends, G.Audit, A.Braghieri, N.d'Hose, S.J.Hall, V.Isbert, J.D.Kellie, I.J.D.MacGregor, P.Pedroni, T.Pinelli, G.Tamas, Th.Walcher, S.Wartenberg

Measurement of the E2/M1 Ratio in the N → Δ Transition using the Reaction p(γ(pol), p)π0

NUCLEAR REACTIONS 1H(polarized γ, π0), E=270-420 MeV; measured σ(θ), photon asymmetries, σ(θp); deduced E2/M1 ratio in N → δ transition.

doi: 10.1103/PhysRevLett.78.606
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1997HA28      Phys.Lett. 401B, 229 (1997)

F.Harter, J.Ahrens, R.Beck, B.Krusche, V.Metag, M.Schmitz, H.Stroher, Th.Walcher, M.Wolf

Two Neutral Pion Photoproduction Off the Proton between Threshold and 800 MeV

NUCLEAR REACTIONS 1H(γ, 2π0), E=threshold-800 MeV; measured two-pion photoproduction σ(E); deduced Δ(1232)-resonance role as intermediate state.

doi: 10.1016/S0370-2693(97)00423-1
Citations: PlumX Metrics


1997HU08      Nucl.Phys. A620, 385 (1997)

A.Hunger, J.Peise, A.Robbiano, J.Ahrens, I.Anthony, H.-J.Arends, R.Beck, G.P.Capitani, B.Dolbilkin, H.Falkenberg, G.Galler, S.J.Hall, J.D.Kellie, R.Kondratev, R.Kordsmeier, V.Lisin, A.I.L'vov, G.J.Miller, C.Molinari, P.Ottonello, A.R.Reolon, M.Sanzone, M.Schmitz, M.Schneider, M.Schumacher, O.Selke, Th.Walcher, F.Wissmann, S.Wolf, A.Zucchiatti

Compton Scattering by the Proton Through θ(cms) = 75° and 90° in the Δ-Resonance Region

NUCLEAR REACTIONS 1H(γ, γ), E=200-500 MeV; measured Compton scattering σ(θ); deduced multipole distribution. Dispersion relations. Δ-resonance.

doi: 10.1016/S0375-9474(97)00184-X
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1997KR13      Phys.Rev.Lett. 79, 3834 (1997)

A.Kraus, O.Selke, F.Rambo, G.Galler, M.Schumacher, F.Smend, R.Wichmann, S.Wolf, J.Ahrens, H.-J.Arends, R.Beck, J.Peise

Beam Asymmetry of Coherent π0 Photoproduction on 4He in the Δ(1232) Range Measured using Coherent Bremsstrahlung

NUCLEAR REACTIONS 4He(polarized γ, π0), E=200-500 MeV bremsstrahlung; measured π0 photoproduction σ(θ) beam asymmetry; deduced beam polarization, collimation effect.

doi: 10.1103/PhysRevLett.79.3834
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1997LI30      Phys.Lett. 411B, 244 (1997)

M.Liang, D.Branford, T.Davinson, D.Johnstone, J.A.MacKenzie, A.C.Shotter, J.R.M.Annand, S.J.Hall, P.D.Harty, J.D.Kellie, I.J.D.MacGregor, J.C.McGeorge, G.J.Miller, R.O.Owens, T.Yau, P.Grabmayr, T.Hehl, J.Leypoldt, T.Lamparter, A.Mondry, M.Sauer, R.Schneider, K.Spaeth, J.Ahrens, R.Beck

12C(γ, π+n) and 12C(γ, π+p) Reaction Across the Δ Resonance Region

NUCLEAR REACTIONS 12C(γ, nπ+), (γ, pπ+), E=150-790 MeV bremsstrahlung; measured σ(θ, Eγ, Eπ); deduced final state interactions. Valencia model.

doi: 10.1016/S0370-2693(97)01005-8
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1997MA11      Phys.Rev. C55, 1033 (1997)

M.Mac Cormick, J.Habermann, J.Ahrens, G.Audit, R.Beck, A.Braghieri, G.Galler, N.d'Hose, V.Isbert, P.Pedroni, T.Pinelli, G.Tamas, S.Wartenberg, A.Zabrodin

Total Photoabsorption Cross Section for 4He from 200 to 800 MeV

NUCLEAR REACTIONS 4He(γ, X), E=200-800 MeV; measured total photoabsorption σ(E).

doi: 10.1103/PhysRevC.55.1033
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0520.


1996CR05      Nucl.Phys. A603, 303 (1996)

R.Crawford, J.Ahrens, S.Altieri, J.R.M.Annand, I.Anthony, G.Audit, R.Beck, A.Braghieri, N.D'Hose, S.Hall, V.Isbert, J.D.Kellie, S.Kerhoas, M.Mac Cormick, J.C.MacGeorge, R.Medaglia, G.J.Miller, L.Y.Murphy, R.O.Owens, P.Pedroni, T.Pinelli, G.Tamas, P.A.Wallace

Two-Body Photodisintegration of the Deuteron from 100 to 800 MeV

NUCLEAR REACTIONS 2H(γ, p), E=200-800 MeV; measured σ(θ), σ. Model comparison.

doi: 10.1016/0375-9474(96)80004-B
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0518.


1996FU04      Phys.Lett. 368B, 20 (1996)

M.Fuchs, J.Ahrens, G.Anton, R.Averbeck, R.Beck, A.M.Bernstein, A.R.Gabler, F.Harter, P.D.Harty, S.Hlavac, B.Krusche, I.J.D.MacGregor, V.Metag, R.Novotny, R.O.Owens, J.Peise, M.Robig-Landau, A.Schubert, R.S.Simon, H.Stroher, V.Tries

Neutral Pion Photoproduction from the Proton Near Threshold

NUCLEAR REACTIONS 1H(γ, π0), E=140-270 MeV; measured σ(θ), σ(E); deduced s-, p-wave multipoles vs E. Tagged photon beam. Low energy theorem, chiral perturbation theory analyses.

doi: 10.1016/0370-2693(95)01488-8
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1996GR05      Phys.Lett. 370B, 17 (1996)

P.Grabmayr, J.Ahrens, J.R.M.Annand, I.Anthony, D.Branford, G.E.Cross, T.Davinson, S.J.Hall, P.D.Harty, T.Hehl, J.D.Kellie, T.Lamparter, I.J.D.MacGregor, J.A.MacKenzie, J.M.McGeorge, G.J.Miller, R.O.Owens, M.Sauer, R.Schneider, K.Spaeth, G.J.Wagner

Excitation Functions for the Two-Nucleon Photoaborption in 6Li

NUCLEAR REACTIONS 6Li(γ, np), (γ, 2p), E=114-600 MeV; measured σ(θ(12)) vs Eγ, missing energy spectra; deduced various photon absorption mechanisms relative importance. Quasideuteron model role in (γ, np).

doi: 10.1016/0370-2693(95)01581-7
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1996HA17      Phys.Lett. 380B, 247 (1996)

P.D.Harty, I.J.D.MacGregor, P.Grabmayr, J.Ahrens, J.R.M.Annand, I.Anthony, R.Beck, D.Branford, G.E.Cross, T.Davinson, S.J.Hall, T.Hehl, J.D.Kellie, T.Lamparter, J.A.MacKenzie, J.C.McGeorge, G.J.Miller, R.O.Owens, M.Sauer, R.Schneider, K.Spaeth

The Contribution of 2N Photon Absorption in 12C(γ, 2N) Reactions for E(γ) = 150-400 MeV

NUCLEAR REACTIONS 12C(γ, np), (γ, 2p), E=150-400 MeV; measured yield vs missing energy, recoil momentum spectra; deduced photon absorption mechanism.

doi: 10.1016/0370-2693(96)00508-4
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1996HU12      Nucl.Instrum.Methods Phys.Res. A372, 135 (1996)

A.Hunger, R.Kordsmeier, M.Schumacher, O.Selke, J.Ahrens, J.Peise, M.Schmitz, M.Schneider, F.Wissmann, B.Dolbilkin, R.Kondratev, V.Lisin, A.Polonsky

A High Angular-Resolution and Time-of-Flight Detector System for Recoil Protons from the Reactions p(γ, γ)p and p(γ, π0)p

NUCLEAR REACTIONS 1H(γ, γ), (γ, π0), E ≤ 350 MeV; measured proton trajectories, π0 photoproduction scatter plots; deduced Compton scattering, π0 background separation related features. High angular resolution recoil proton tof detector.

doi: 10.1016/0168-9002(95)01280-X
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1996LA15      Z.Phys. A355, 1 (1996)

Th.Lamparter, J.Ahrens, J.R.M.Annand, I.Anthony, R.Beck, D.Branford, G.E.Cross, T.Davinson, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, J.D.Kellie, I.J.D.MacGregor, J.A.MacKenzie, J.C.McGeorge, G.J.Miller, R.O.Owens, M.Sauer, R.Schneider, K.Spaeth, G.J.Wagner

On Photonuclear Reaction Mechanisms at Intermediate Energies

NUCLEAR REACTIONS 12C(γ, np), (γ, 2p), E=114-600 MeV; measured missing energy spectra. Valencia model, Monte Carlo simulations.

doi: 10.1007/s002180050069
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1996MA01      Phys.Rev. C53, 41 (1996)

M.Mac Cormick, G.Audit, N.d'Hose, L.Ghedira, V.Isbert, S.Kerhoas, L.Y.Murphy, G.Tamas, P.A.Wallace, S.Altieri, A.Braghieri, P.Pedroni, T.Pinelli, J.Ahrens, R.Beck, J.R.M.Annand, R.A.Crawford, J.D.Kellie, I.J.D.MacGregor, B.Dolbilkin, A.Zabrodin

Total Photoabsorption Cross Sections for 1H, 2H, and 3He from 200 to 800 MeV

NUCLEAR REACTIONS 1,2H, 3He(γ, X), E=200-800 MeV; measured total photoabsorption σ(E); deduced nucleon resonance changes vs target mass.

doi: 10.1103/PhysRevC.53.41
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0519.


1996MA20      Phys.Rev. C54, R6 (1996)

J.A.MacKenzie, D.Branford, J.Ahrens, J.R.M.Annand, R.Beck, G.E.Cross, T.Davinson, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, D.G.Johnstone, J.D.Kellie, T.Lamparter, M.Liang, I.J.D.MacGregor, J.C.McGeorge, R.O.Owens, M.Sauer, R.Schneider, A.C.Shotter, K.Spaeth, P.J.Woods, T.Yau

Quasifree π+ Production Studied using the 12C(γ, π+n)11B Reaction in the Δ(1232) Resonance Region

NUCLEAR REACTIONS 12C(γ, nπ+), E=280-320 MeV; measured σ(θ(π), θ(n)). Model comparison.

doi: 10.1103/PhysRevC.54.R6
Citations: PlumX Metrics


1996MO04      Phys.Lett. 371B, 181 (1996)

C.Molinari, P.Ottonello, A.Robbiano, M.Sanzone, A.Zucchiatti, G.P.Capitani, A.R.Reolon, H.Falkenberg, A.Hunger, R.Kordsmeier, M.Schumacher, J.Ahrens, H.J.Arends, R.Beck, J.Peise, F.Wissmann, B.Dolbilkin, R.Kondratev, V.Lisin, I.Anthony, J.D.Kellie, S.J.Hall, G.J.Miller

Scattering of Photons by the Proton Through θ(cms) = 90° in the Δ-Resonance Region

NUCLEAR REACTIONS 1H(γ, γ), E=250-500 MeV; measured σ(θγ), recoil proton spectra. Dispersion theories comparison.

doi: 10.1016/0370-2693(96)00020-2
Citations: PlumX Metrics


1996PE19      Phys.Lett. 384B, 37 (1996)

J.Peise, A.Hunger, J.Ahrens, I.Anthony, H.-J.Arends, R.Beck, G.P.Capitani, B.Dolbilkin, H.Falkenberg, S.J.Hall, P.Jennewein, J.D.Kellie, R.Kondratev, R.Kordsmeier, V.Lisin, A.I.Lvov, G.J.Miller, C.Molinari, A.R.Reolon, A.Robbiano, M.Sanzone, M.Schmitz, M.Schneider, M.Schumacher, O.Selke, Th.Walcher, F.Wissmann

Compton Scattering by the Proton Through θ(cms) = 75° in the Δ-Resonance Region

NUCLEAR REACTIONS 1H(γ, γ), E=200-410 MeV; measured Compton scattering σ(θ); deduced Δ-photo excitation reduced M1 strength.

doi: 10.1016/0370-2693(96)00709-5
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1996RO06      Phys.Lett. 373B, 45 (1996)

M.Robig-Landau, J.Ahrens, G.Anton, R.Averbeck, R.Beck, M.Fuchs, A.R.Gabler, F.Harter, P.D.Harty, V.Hejny, B.Krusche, I.J.D.MacGregor, J.C.McGeorge, V.Metag, R.Novotny, J.Peise, A.Schubert, R.S.Simon, H.Stroher

Near Threshold Photoproduction of η-mesons from Complex Nuclei

NUCLEAR REACTIONS 12C, 40Ca, 93Nb, Pb(γ, X), E=790 MeV; measured total, differential σ for η production; deduced absorption by nucleon σ, length in nuclear matter.

doi: 10.1016/0370-2693(96)00125-6
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1996SE02      Phys.Lett. 369B, 207 (1996)

O.Selke, A.Hunger, A.Kraus, M.Schumacher, R.Wichmann, J.Ahrens, H.J.Arends, R.Beck, J.Peise, M.Schneider, F.Wissmann

Compton Scattering from 4He in the Δ(1232) Resonance Region

NUCLEAR REACTIONS 4He(γ, γ), E=120-510 MeV; measured Compton scattering σ(θ). Schematic model analysis.

doi: 10.1016/0370-2693(95)01580-9
Citations: PlumX Metrics


1996WI10      Z.Phys. A355, 169 (1996)

R.Wichmann, J.Ahrens, H.J.Arends, R.Beck, G.Galler, A.Hunger, A.Kraus, I.J.D.MacGregor, J.Peise, B.Seitz, M.Schmitz, M.Schneider, O.Selke, M.Schumacher, F.Wissmann

Photoemission of Protons from 4He in the Δ-Resonance Region

NUCLEAR REACTIONS 4He(γ, p), E=130-525 MeV; measured proton spectra; deduced three separate reaction channels.

doi: 10.1007/s002180050095
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0548.


1995BR31      Phys.Lett. 363B, 46 (1995)

A.Braghieri, L.Y.Murphy, J.Ahrens, G.Audit, N.d'Hose, V.Isbert, S.Kerhoas, M.Mac Cormick, P.Pedroni, T.Pinelli, G.Tamas, A.Zabrodin

Total Cross Section Measurement for the Three Double Pion Photoproduction Channels on the Proton

NUCLEAR REACTIONS 1H(p, X), E=400-800 MeV; measured total double pion production σ vs E. Large acceptance hadronic detector, tagged photon beam.

doi: 10.1016/0370-2693(95)01189-W
Citations: PlumX Metrics


1995CR04      Nucl.Phys. A593, 463 (1995)

G.E.Cross, I.J.D.MacGregor, J.C.McGeorge, J.Ahrens, I.Anthony, J.R.M.Annand, R.Beck, D.Branford, T.Davinson, P.Grabmayr, S.J.Hall, P.D.Harty, T.Hehl, J.D.Kellie, T.Lamparter, L.Machenil, J.A.MacKenzie, G.J.Miller, R.O.Owens, J.Ryckebusch, M.Sauer, R.Schneider, K.Spaeth, M.Vanderhaeghen

Proton Photoproduction from 12C

NUCLEAR REACTIONS 12C(γ, p), E=200-500 MeV; measured σ(θ). 12C(γ, np), (γ, 2p), E=300 MeV; measured σ(θ, E(nucleon)); deduced reaction mechanism. Tagged photon beam.

doi: 10.1016/0375-9474(95)00318-U
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0797.


1995KR06      Phys.Rev.Lett. 74, 3736 (1995)

B.Krusche, J.Ahrens, G.Anton, R.Beck, M.Fuchs, A.R.Gabler, F.Harter, S.Hall, P.Harty, S.Hlavac, D.MacGregor, C.McGeorge, V.Metag, R.Owens, J.Peise, M.Robig-Landau, A.Schubert, R.S.Simon, H.Stroher, V.Tries

Near Threshold Photoproduction of (eta) Mesons Off the Proton

NUCLEAR REACTIONS 1H(γ, X), E=threshold-790 MeV; measured total, differential σ for eta meson production; deduced D13(1520) resonance contribution role.

doi: 10.1103/PhysRevLett.74.3736
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1995KR09      Z.Phys. A351, 237 (1995)

B.Krusche, J.Ahrens, I.Anthony, G.Anton, R.Beck, M.Fuchs, A.R.Gabler, F.Harter, S.J.Hall, S.Hlavac, K.-H.Kaiser, J.D.Kellie, V.Metag, G.J.Miller, R.O.Owens, J.Peise, M.Robig-Landau, A.Schubert, R.S.Simon, H.Stroher, V.Tries

Mass and Γ(3π0)/Γ(γγ) Decay Branching Ratio of the (eta)-Meson from the p(γ, (eta))p Reaction

NUCLEAR REACTIONS 1H(γ, X), E ≈ 707-790 MeV; measured missing, invariant mass spectra for eta production; deduced (eta)-decay branching ratio Γ(3π0)/Γ(γγ). TAPS spectrometer.

doi: 10.1007/BF01290901
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1995KR14      Phys.Rev.Lett. 75, 3023 (1995)

B.Krusche, J.Ahrens, G.Anton, R.Beck, M.Fuchs, A.R.Gabler, F.Harter, S.Hall, P.Harty, S.Hlavac, D.MacGregor, C.McGeorge, V.Metag, R.Owens, J.Peise, M.Robig-Landau, A.Schubert, R.S.Simon, H.Stroher, V.Tries

Krusche et al. Reply:

NUCLEAR REACTIONS 1H(γ, X), E ≈ threshold; analyzed η production data analyses.

doi: 10.1103/PhysRevLett.75.3023
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1995KR15      Phys.Lett. 358B, 40 (1995); Erratum Phys.Lett. 376B, 331 (1996)

B.Krusche, J.Ahrens, J.R.M.Annand, G.Anton, R.Beck, M.Fuchs, A.R.Gabler, F.Harter, V.Hejny, J.D.Kellie, J.C.McGeorge, V.Metag, J.Peise, M.Robig-Landau, A.Schubert, H.Stroher

Near-Threshold Photoproduction of η-Mesons from the Deuteron

NUCLEAR REACTIONS 2H(γ, X), E ≈ 627-790 MeV; measured incoherent η production σ(E), σ(θ). Participant-spectator approximation analysis.

doi: 10.1016/0370-2693(95)00985-T
Citations: PlumX Metrics


1994FR19      Z.Phys. A350, 249 (1994)

Th.Frommhold, F.Steiper, W.Henkel, U.Kneissl, J.Ahrens, R.Beck, J.Peise, M.Schmitz, I.Anthony, J.D.Kellie, S.J.Hall, G.J.Miller

Photofission of 235U and 238U at Intermediate Energies: Absolute cross sections and fragment mass distributions

NUCLEAR REACTIONS, ICPND 238,235U(γ, F), E=50-800 MeV; measured total fission σ(E), fragment mass distributions. 4π arrangement, position sensitive fragment detectors.

doi: 10.1007/BF01289589
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0772.


1994IS05      Nucl.Phys. A578, 525 (1994)

V.Isbert, G.Audit, N.d'Hose, S.Kerhoas, M.Mac Cormick, G.Tamas, P.A.Wallace, S.Altieri, A.Braghieri, P.Pedroni, T.Pinelli, L.Y.Murphy, J.Ahrens, R.Beck, J.Peise, J.R.M.Annand, I.Anthony, R.Crawford, S.J.Hall, J.D.Kellie, G.J.Miller, and the DAPHNE Collaboration

Two-Body Photodisintegration of 3He between 200 and 800 MeV

NUCLEAR REACTIONS 3He(γ, pd), E=200-800 MeV; measured σ(θ) vs Eγ at fixed (θ(p))(cm), σ(θ).

doi: 10.1016/0375-9474(94)90759-5
Citations: PlumX Metrics


1994LO19      Nucl.Instrum.Methods Phys.Res. A343, 494 (1994)

D.Lohmann, J.Peise, J.Ahrens, I.Anthony, H.-J.Arends, R.Beck, R.Crawford, A.Hunger, K.H.Kaiser, J.D.Kellie, Ch.Klumper, P.Krahn, A.Kraus, U.Ludwig, M.Schumacher, O.Selke, M.Schmitz, M.Schneider, F.Wissmann, S.Wolf

Linearly Polarized Photons at MAMI (Mainz)

doi: 10.1016/0168-9002(94)90230-5
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1994WI13      Phys.Lett. 335B, 119 (1994)

F.Wissmann, J.Peise, M.Schmitz, M.Schneider, J.Ahrens, I.Anthony, R.Beck, B.Dolbilkin, S.J.Hall, F.Harter, S.Herdade, J.Herrmann, A.Hunger, P.Jennewein, J.D.Kellie, R.Kondratev, H.-P.Krahn, K.-H.Krause, V.Kusnetzov, V.Lisin, G.J.Miller, A.Polonsky, M.Schumacher, J.Sobolewski, Th.Walcher, A.Zabrodin

Elastic and Inelastic Photon Scattering from 12C

NUCLEAR REACTIONS 12C(γ, γ), (γ, γ'), E=200-500 MeV; measured σ(θ) vs Eγ. Simple static ansatz, Δ-hole models comparison.

doi: 10.1016/0370-2693(94)91401-X
Citations: PlumX Metrics


1993AH01      Nucl.Phys. A553, 625c (1993)

J.Ahrens

First Results from MAMI

NUCLEAR REACTIONS 3He, 238U(γ, X), E ≤ 800 MeV; compiled, reviewed σ(E) data; 12C(γ, γ), E ≈ 200-500 MeV; compiled, reviewed σ(θ) vs E data; 1H(γ, π0), E ≈ 275-500 MeV; compiled reviewed σ(E). Quasi-monochromatic, real photons from 100% duty factor electron accelerator.

doi: 10.1016/0375-9474(93)90669-O
Citations: PlumX Metrics


1992FR16      Phys.Lett. 295B, 28 (1992)

Th.Frommhold, F.Steiper, W.Henkel, U.Kneissl, J.Ahrens, R.Beck, J.Peise, M.Schmitz

Total Photofission Cross Section for 238U as a Substitute for the Photon Absorption Cross Section in the Energy Range of the First Baryon Resonances

NUCLEAR REACTIONS 238U(γ, F), E=50-800 MeV; measured total fission σ(E) in resonance region. Monochromatic tagged photons, sophisticated 4π-arrangement of position sensitive fragment detectors.

doi: 10.1016/0370-2693(92)90084-H
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0950.


1992KR15      Nucl.Phys. A549, 387 (1992)

K.-H.Krause, J.Sobolewski, J.Ahrens, J.M.Henneberg, B.Ziegler

Photodisintegration of the Deuteron by Linearly Polarized Photons

NUCLEAR REACTIONS 2H(polarized γ, p), E=54, 60, 68, 88 MeV; measured σ(E, θp), polarization asymmetry. Model comparison. Quasi-monochromatic linearly polarized photon beam, liquid target, semiconductor detectors.

doi: 10.1016/0375-9474(92)90086-Y
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset22242.


1990HE15      Ann.Phys.(Paris) 15, 39 (1990)

W.Heil, J.Ahrens, H.G.Andresen, A.Bornheimer, D.Conrath, K.-J.Dietz, W.Gasteyer, H.-J.Gessinger, W.Hartmann, J.Jeth-Wa, H.-J.Kluge, H.Kessler, T.Kettner, L.Koch, F.Neugebauer, R.Neuhausen, E.W.Otten, E.Reichert, F.P.Schafer, B.Wagner

Measurement of the Parity Violation in the Quasi-Elastic Scattering of Polarized Electrons from 9Be

NUCLEAR REACTIONS 9Be(polarized e, e'X), E=300 MeV; measured parity violating asymmetry; deduced Weinberg angle. Model independent electron-nucleon coupling constants.


1990RO05      Phys.Lett. 234B, 460 (1990)

K.W.Rose, B.Zurmuhl, P.Rullhusen, M.Ludwig, A.Baumann, M.Schumacher, J.Ahrens, A.Zieger, D.Christmann, B.Ziegler, B.Schoch

Polarizability of the Neutron

NUCLEAR REACTIONS 2H(γ, γ'n), E=80-130 MeV; measured σ(θn), θγ=135°; deduced bremsstrahlung weighted σ(θn, En, θγ'), neutron polarizability.

doi: 10.1016/0370-2693(90)92039-L
Citations: PlumX Metrics


1990RO11      Nucl.Phys. A514, 621 (1990)

K.W.Rose, B.Zurmuhl, P.Rullhusen, M.Ludwig, A.Baumann, M.Schumacher, J.Ahrens, A.Zieger, D.Christmann, B.Ziegler

Quasi-Free Compton Scattering by the Neutron

NUCLEAR REACTIONS 2H(γ, γ'), E=130 MeV bremsstrahlung; measured nγ-coin; deduced σ(θγ, θn) for quasifree Compton scattering by the neutron following breakup. 1n deduced electromagnetic polarizability.

doi: 10.1016/0375-9474(90)90014-D
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1988AH03      Nucl.Phys. A485, 621 (1988)

J.Ahrens, L.S.Ferreira, W.Weise

Photonuclear Dispersion Relation and Δ Excitations in Nuclei

NUCLEAR REACTIONS 12C, 27Al, 208Pb, 238U(γ, X), E < 500 MeV; calculated σ(E). Dispersion relation approach.

doi: 10.1016/0375-9474(88)90557-X
Citations: PlumX Metrics


1988AH04      Nucl.Phys. A490, 655 (1988)

J.Ahrens, H.Gimm, T.Beuermann, P.Rullhusen, M.Schumacher, B.Fricke, W.D.Sepp

Molecular Effects on the Cross Section for Pair Production and Their Importance in the Evaluation of the Total Photonuclear Cross Section of 16O in the Δ-Resonance Region

NUCLEAR REACTIONS 16O(γ, X), E=90-400 MeV; measured total absorption σ; calculated pair-production σ(pp) on the oxygen molecule.

doi: 10.1016/0375-9474(88)90019-X
Citations: PlumX Metrics


1987AH06      Helv.Phys.Acta 60, 738 (1987)

J.Ahrens, H.G.Andresen, H.J.Gessinger, W.Hartmann, W.Heil, H.J.Kluge, R.Neuhausen, E.W.Otten, E.Reichert, F.P.Schafer, B.Wagner

Measurement of the Parity Violation in the Quasi-Free Scattering of Polarized Electrons from 9Be

NUCLEAR REACTIONS 9Be(polarized e, e'), E=300 MeV; measured parity violating helicity asymmetry; deduced weak, neutral current, nucleon model independent weak coupling constants.


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