NSR Query Results
Output year order : Descending NSR database version of March 18, 2024. Search: Author = J.Ahrens Found 108 matches. Showing 1 to 100. [Next]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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
2001AH07 Acta Phys.Hung.N.S. 14, 13 (2001) Half a Century of Experimental Photonuclear Physics
doi: 10.1556/APH.14.2001.1-4.3
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
1993AH01 Nucl.Phys. A553, 625c (1993) 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
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
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
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
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
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
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
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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