# Dr John McGeorge

• Honorary Research Associate (School of Physics & Astronomy)

R521 Level 5, Physics and Astronomy, Kelvin Building

## Publications

List by: Type | Date

Jump to: 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 | 1995 | 1993 | 1992 | 1991 | 1988 | 1987 | 1986 | 1985
Number of items: 110.

## 2020

Sokhoyan, V. et al. (2020) Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead. Physics Letters B, 802, 135243.

## 2019

Briscoe, W. J. et al. (2019) Cross section for γn → π0n measured at the Mainz A2 experiment. Physical Review C, 100(6), 065205.

Akondi, C. S. et al. (2019) Experimental study of the γp→K0Σ+, γn→K0Λ, and γn→K0Σ0 reactions at the Mainz Microtron. European Physical Journal A, 55(11), 202.

## 2018

Adlarson, P. et al. (2018) Measurement of the decay η′→π0π0η at MAMI. Physical Review D, 98, 012001.

Dieterle, M. et al. (2018) Photoproduction of π0 mesons off protons and neutrons in the second and third nucleon resonance region. Physical Review C, 97, 065205.

Prakhov, S. et al. (2018) High-statistics measurement of the η→3π0 decay at the Mainz Microtron. Physical Review C, 97, 065203.

Prakhov, S. et al. (2018) High-statistics measurement of the η → 3π0 decay at MAMI. Physical Review C, 97, 065203.

Sokhoyan, V. et al. (2018) Experimental study of the γp→π0ηp reaction with the A2 setup at the Mainz Microtron. Physical Review C, 97, 055212.

## 2017

Kashevarov, V.L. et al. (2017) Study of η and η' photoproduction at MAMI. Physical Review Letters, 118(21), 212001. (PMID:28598665)

Adlarson, P. et al. (2017) Measurement of the ω→π0e+e− and η→e+e−γ Dalitz decays with the A2 setup at the Mainz Microtron. Physical Review C, 95, 035208.

Adlarson, P. et al. (2017) Measurement of the π0→e+e−γ Dalitz decay at the Mainz Microtron. Physical Review C, 95(2), 025202.

## 2016

Gardner, S. et al. (2016) Photon asymmetry measurements of γp → π0p for Eγ = 320–650 MeV. European Physical Journal A, 52, 333.

Käser, A. et al. (2016) Photoproduction of ηπ pairs off nucleons and deuterons. European Physical Journal A, 52(9), 272.

## 2015

Dieterle, M. et al. (2015) Photoproduction of π0-pairs off protons and off neutrons. European Physical Journal A, 51(11), 142.

Al Jebali, R. A.I. et al. (2015) A helium gas scintillator active target for photoreaction measurements. European Physical Journal A, 51, 123.

Käser, A. et al. (2015) The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region. Physics Letters B, 748, pp. 244-250.

Adlarson, P. et al. (2015) Measurement of π0 photoproduction on the proton at MAMI C. Physical Review C, 92(2), 024617.

Strakovsky, I. I. et al. (2015) Photoproduction of the ωmeson on the proton near threshold. Physical Review C, 91(4), 045207.

## 2014

Costanza, S. et al. (2014) Helicity dependence of the γ 3He → πX reactions in the Δ(1232) resonance region. European Physical Journal A, 50(173), -173:.

Jude, T.C. et al. (2014) $K+Λ$ and $K+Σ0$ photoproduction with fine center-of-mass energy resolution. Physics Letters B, 735, pp. 112-118.

Werthmüller, D. et al. (2014) Quasifree photoproduction of η mesons off protons and neutrons. Physical Review C, 90(1), 015205.

Tarbert, C. M. et al. (2014) The neutron skin of 208Pb from coherent pion photoproduction. Physical Review Letters, 112(24), p. 242502.

Aguar-Bartolomé, P. et al. (2014) New determination of the η transition form factor in the Dalitz decay η→e+e−γ with the Crystal Ball/TAPS detectors at the Mainz Microtron. Physical Review C, 89(4), 044608.

Dieterle, M. et al. (2014) Photoproduction of π0 mesons off neutrons in the nucleon resonance region. Physical Review Letters, 112(14), p. 142001.

Oberle, M. et al. (2014) Measurement of the beam-helicity asymmetry I⊙ in the photoproduction of pi0 pi±- pairs off the protons and off the neutrons. European Physical Journal A, 50, p. 54.

Nikolaev, A. et al. (2014) Determination of the η mass with the Crystal Ball at MAMI-B. European Physical Journal A, 50(3), p. 58.

Sikora, M.H. et al. (2014) Measurement of the H1(γ, p→)π0 reaction using a novel nucleon spin polarimeter. Physical Review Letters, 112(2), 022501.

## 2013

Werthmueller, D. et al. (2013) Narrow structure in the excitation function of η photoproduction off the neutron. Physical Review Letters, 111(23), Art. 232001. (PMID:24476257)

Witthauer, L. et al. (2013) Quasi-free photoproduction of η-mesons off 3He nuclei. European Physical Journal A, 49(154),

Thiel, M. et al. (2013) In-medium modifications of the ω meson near the production threshold. European Physical Journal A, 49(132),

Bartolome, P. et al. (2013) First measurement of the helicity dependence of He-3 photoreactions in the Delta(1232) resonance region. Physics Letters B, 723(1-3), pp. 71-77.

Robinson, J. et al. (2013) Measurements of 12C(→γ,pp) photon asymmetries for Eγ= 200–450 MeV. European Physical Journal A, 49(65),

Oberle, M. et al. (2013) Measurement of the beam-helicity asymmetry I in the photoproduction of π0-pairs off the proton and off the neutron. [Key Findings]

Maghrbi, Y. et al. (2013) Coherent photoproduction of π0- and η-mesons off 7Li. European Physical Journal A, 49(38),

Schmidt, A. et al. (2013) Erratum: test of low-energy theorems for H1(γ→ ,π0)H1 in the threshold region [Phys. Rev. Lett. 87, 232501 (2001)]. Physical Review Letters, 110(3), Art. 039903(E).

## 2012

Zehr, F. et al. (2012) Photoproduction of π0π0 - and π0π+ -pairs off the proton from threshold to the second resonance region. European Physical Journal A, 48(98),

Kashevarov, V. L. et al. (2012) Experimental study of the γp→π0π0p reaction with the Crystal Ball/TAPS detector system at the Mainz Microtron. Physical Review C, 85(6), Art. 064610.

Pheron, F. et al. (2012) Coherent photoproduction of η-mesons off 3He – search for η-mesic nuclei. Physics Letters B, 709(1-2), pp. 21-27.

Glazier, D.I. et al. (2012) Angular distribution of coherent bremsstrahlung. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 664(1), pp. 132-139.

## 2011

McNicoll, E. F. et al. (2011) Erratum: experimental study of the γp→ηp reaction with the crystal ball detector at the Mainz Microtron (MAMI-C) [Phys. Rev. C 82, 035208 (2010)]. Physical Review C, 84(2), Art. 029901(E).

Berghäuser, H. et al. (2011) Determination of the η-transition form factor in the γp→pη→pγe+e reaction. Physics Letters B, 701(5), pp. 562-567.

## 2010

Kashevarov, V.L. et al. (2010) First measurement of the circular beam asymmetry in the γ p → π0ηp reaction. Physics Letters B, 693(5), pp. 551-554.

McNicoll, E.F. et al. (2010) Experimental study of the γp→ηp reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C). Physical Review C, 82(3), 035208.

## 2009

Middleton, D.G. et al. (2009) Investigation of the exclusive 3He(e,epn)1H reaction. Physical Review Letters, 103(15), p. 152501.

Krambrich, D. et al. (2009) Beam-helicity asymmetries in double-pion photoproduction off the proton. Physical Review Letters, 103(5), 052002.

Starostin, A. et al. (2009) Search for the charge-conjugation-forbidden decay ω→ηπ0. Physical Review C, 79(6), 065201.

Prakhov, S. et al. (2009) Measurement of the slope parameter α for the η→3π(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C). Physical Review C, 79(3), 035204.

Unverzagt, M. et al. (2009) Determination of the Dalitz plot parameter α for the decay η → 3 π0 with the Crystal Ball at MAMI-B. European Physical Journal A, 39(2), pp. 169-177.

## 2008

Middleton, D.G. et al. (2008) 3He(e,e′pp) and 3He(e,e′pn) reactions at AmPS and MAMI. Few: Body Systems, 44(1-4), pp. 171-174.

Tarbert, C.M. et al. (2008) Incoherent neutral pion photoproduction on C-12. Physical Review Letters, 100(13),

## 2006

Middleton, D.G. et al. (2006) Erratum: First measurements of the 16O(e, e'pn)14N reaction. European Physical Journal A, 30(2), p. 469.

## 2005

Ahrens, J. et al. (2005) Intermediate resonance excitation in the reaction. Physics Letters B, 624(3-4), pp. 173-180.

Kellie, J. et al. (2005) The selection and performance of diamond radiators used in coherent bremsstrahlung experiments. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 545(1-2), pp. 164-180.

Pfeiffer, M. et al. (2005) Comment on "Photoproduction of eta-mesic He-3": reply. Physical Review Letters, 94(4), Art. 049102.

## 2004

Krusche, B. et al. (2004) Photoproduction of pi(0)-mesons from nuclei. European Physical Journal A, 22(2), pp. 277-291.

Kossert, K. et al. (2004) Quasi-free π0 photoproduction from the bound nucleon. European Physical Journal A, 19(3), pp. 391-399.

Kotulla, M. et al. (2004) Double pi0 photoproduction off the proton at threshold. Physics Letters B, 578(1-2), 63 -68.

## 2003

Kossert, K. et al. (2003) Quasi-free Compton scattering and the polarizabilities of the neutron. European Physical Journal A, 16(2), 259 -273.

## 2002

Kotulla, M. et al. (2002) The reaction gamma p ->pi(0) gamma' p and the magnetic dipole moment of the Delta(+)(1232) resonance. Physical Review Letters, 89(27), Art. 272001.

Messchendorp, J.G. et al. (2002) In-medium modifications of the pi pi interaction in photon-induced reactions. Physical Review Letters, 89(22), p. 222302.

Branford, D. et al. (2002) Investigation of Delta-medium effects using the He-4(gamma,pi(+)n)H-3 and He-4(gamma,pi(+)p)nnn reactions. Physical Review C, 66(1), 015208.

## 2001

Krusche, B., Ahrens, J., Beck, R., , McGeorge, J.C., Metag, V. and Stroher, H. (2001) In-medium properties of the D13(1520)nucleon resonance. Physical Review Letters, 86(21), 4764 -4767.

Powrie, C.J.Y. et al. (2001) Polarized photon measurements of the 12C(gamma over-right- arrow,pp) and 12C(gamma over-right-arrow,pn) reactions for Egamma=160-350 MeV. Physical Review C, 6403(3), art 034602.

## 2000

Siodlaczek, U. et al. (2000) Search for narrow dibaryon resonances in neutral pion photoproduction from the deuteron. European Physical Journal A, 9(3), 309 -311.

Ahrens, J. et al. (2000) Helicity dependence of γp→Nπ below 450 MeV and contribution to the Gerasimov-Drell-Hearn sum rule. Physical Review Letters, 84(26), pp. 5950-5954.

Beck, R. et al. (2000) Determination of the E2/M1 ratio in the gamma N to Delta (1232) transition from a simultaneous measurement of p( gamma ,p) pi /sup 0/ and p( gamma , pi /sup +/)n. Physical Review C, 61(3), art 035204.

Branford, D. et al. (2000) Nuclear pion photoproduction in the Delta resonance region. Physical Review C, 61(1), 014603.

Watts, D.P. et al. (2000) The 12C(gamma,NN) reaction studied over a wide kinematic range. Physical Review C, 62(1), 014616-1-014616-15.

## 1999

McAllister, S.J. et al. (1999) The (γ,pd) reaction in 12C. Physical Review C, 60, 044610.

Franczuk, S. et al. (1999) 12C(,pn) photon asymmetry for Eγ=180–340 MeV. Physics Letters B, 450(4), pp. 332-338.

## 1998

Sims, D.A. et al. (1998) The 4He(γ,n) reaction: a potential testing ground for the alpha-particle wavefunction. Physics Letters B, 442(1-4), pp. 43-47.

Yau, T.T.H. et al. (1998) The angular distribution of the 12C(γ,pn) reaction for Eγ=120−150 MeV. European Physical Journal A, 1(3), pp. 241-244. (doi: 10.1007/s100500050055)

MacGregor, I.J.D. et al. (1998) Mechanisms in the 12C(γ,pn) and (γ,pp)reactions. Physical Review Letters, 80(2), pp. 245-248.

Harty, P.D. et al. (1998) Investigation of multiparticle final states in C-12 photoreactions. Physical Review C, 57(1), pp. 123-128. (doi: 10.1103/PhysRevC.57.123)

## 1997

Liang, M. et al. (1997) 12C(γ,π+n) and 12C(γ,π+p) reactions across the Δ resonance region. Physics Letters B, 411(3-4), pp. 244-248.

Annand, J.R.M. et al. (1997) Population of states in 15O following the 16O(γ,n) reaction. Project Report. University of Lund. (Unpublished)

Grabmayr, P. et al. (1997) Mechanisms of the 12C(gamma,NN) reactions at Egamma = 114 - 600 MeV. In: 14th International Conference on Particles and Nuclei, Williamsburg, VA, USA, 22 -28 May 1996, pp. 296-297.

Laing, M. et al. (1997) Exclusive charged pion photo-production in 12C. In: Li, L.F., Phua, K.K., Wong, S.S.M. and Young, B.L. (eds.) Looking to the 21st Century: Proceedings of the First International Conference on Frontiers of Physics : Joint Meeting of the Chinese Physical Societies Shantou, China 5-9 August. World Scientific, pp. 646-651.

Liang, M. et al. (1997) Quasifree pion photo-production and FSI in the nuclear medium at delta-resonance energies. In: 14th International Conference on Particles and Nuclei, Williamsburg, VA, USA, 22 -28 May 1996, pp. 298-300.

## 1996

Lamparter, T. et al. (1996) On photonuclear reaction mechanisms at intermediate energies. Zeitschrift für Physik A: Hadrons and Nuclei, 355(1), pp. 1-3. (doi: 10.1007/s002180050069)

MacGregor, I.J.D. et al. (1996) PiP - A large solid angle scintillation telescope for detecting protons and pions. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 382(3), pp. 479-489.

Harty, P.D. et al. (1996) The contribution of 2N photon absorption in 12C(γ,2N) reactions for Eγ = 150–400 MeV. Physics Letters B, 380(3-4), pp. 247-252.

Roebig-Landau, M. et al. (1996) Near threshold photoproduction of η-mesons from complex nuclei. Physics Letters B, 373(1-3), pp. 45-50.

Grabmayr, P. et al. (1996) Excitation functions for the two-nucleon photoabsorption in Li-6. Physics Letters B, 370(1-2), pp. 17-21.

## 1995

Cross, G.E. et al. (1995) Proton photoproduction from 12C. Nuclear Physics A, 593(4), pp. 463-487.

Krusche, B. et al. (1995) Photoproduction of eta-mesons near-threshold - Reply. Physical Review Letters, 75(16), p. 3023.

Krusche, B. et al. (1995) Near threshold photoproduction of η mesons off the proton. Physical Review Letters, 74(19), Art. 3736.

Harty, P.D. et al. (1995) 12C(γ,p)11B cross section from 80 to 157 MeV. Physical Review C, 51(4), pp. 1982-1990. (doi: 10.1103/PhysRevC.51.1982)

McGeorge, J.C. et al. (1995) (γ,2N) reaction in 12C. Physical Review C, 51(4), pp. 1967-1976. (doi: 10.1103/PhysRevC.51.1967)

Miller, G.J. et al. (1995) The O-16(gamma,p) reaction at E-gamma=60 and 72-MeV. Nuclear Physics A, 586(1), pp. 125-139.

## 1993

Schmieden, H. et al. (1993) Scaling of the 4He(γ,p)t reaction in the Eγ = 80–160 MeV region. Physics Letters B, 314(304), pp. 284-288.

Doran, S.M. et al. (1993) The 4He(gamma,2N) reaction measured with tagged photons. Nuclear Physics A, 559(3), pp. 347-367.

Harty, P.D., , McGeorge, J.C., Dancer, S.N. and Owens, R.O. (1993) Neutron propagation in 12C for energies 20 to 45 MeV. Physical Review C, 47(5), pp. 2185-2189. (doi: 10.1103/PhysRevC.47.2185)

Grabmayr, P. et al. (1993) Photoabsorption and correlated nucleon pairs. In: 8th Miniconference on Correlations in Hadronic Systems, Amsterdam, The Netherlands, 9-10 Dec 1993, pp. 1-6.

Grabmayr, P. et al. (1993) Kinematically complete studies of the 6Li(gamma,np) reaction. In: 13th International Conference on Particles and Nuclei, Perugia, Italy, 28 Jun - 2 Jul 1993, pp. 388-389.

Krusche, B. et al. (1993) Study of N* resonances by eta photoproduction. In: 13th International Conference on Particles and Nuclei, Perugia, Italy, 28 Jun - 2 Jul 1993, p. 408.

McGeorge, J.C. et al. (1993) The (gamma,pn) and (gamma,pp) reactions in 12C. In: 13th International Conference on Particles and Nuclei, Perugia, Italy, 28 Jun - 2 Jul 1993, pp. 418-419.

## 1992

Audit, G. et al. (1992) The DAPHNE project at Mainz MAMI-B. In: Seventh Course and the Second Winter Course of the International School of Intermediate Energy Nuclear Physics, L'Aquila, Italy, 16-26 Jul 1990, pp. 500-502.

Terzoudi, P. et al. (1992) Study of the (gamma,pi n) reaction on complex nuclei in the Delta-resonance region. In: International Conference on New Nuclear Physics With Advanced Techniques, Ierapetra, Greece, 23-29 Jun 1991, pp. 62-70.

## 1991

MacGregor, I.J.D. et al. (1991) The 16O(γ, 2N) reaction measured with tagged photons. Nuclear Physics A, 533(2), pp. 269-291.

Wallace, P.A. et al. (1991) Differential cross section for the reaction 2H(γ, p)n from 133 to 158 MeV. Nuclear Physics A, 532(3-4), pp. 617-633.

## 1988

Dancer, S.N. et al. (1988) Investigation of the C12(γ,pn) reaction using tagged photons. Physical Review Letters, 61(10), pp. 1170-1173.

Annand, J. et al. (1988) Deuteron photodisintegration cross-sections 50-155 MeV. In: Drechsel, D. and Walcher, T. (eds.) Physics with MAMI-A. Institut fuer Kernphysik, Johannes Gutenberg Universitaet Mainz: Mainz, Germany, pp. 60-66.

Dancer, S.N. et al. (1988) (gamma,np) reactions in 12C , 6Li and 3,4He. In: Drechsel, D. and Walcher, T. (eds.) Physics with MAMI-A. Institut fuer Kernphysik, Johannes Gutenberg Universitaet Mainz: Mainz, Germany, pp. 46-59.

Vogt, J. et al. (1988) 6Li(γ,np)alpha for 80 MeV < Eγ < 160 MeV. In: 3rd Workshop on Perspectives in Nuclear Physics at Intermediate Energies, Trieste, Italy, 18-22 May 1987, pp. 633-641.

## 1987

MacGregor, I.J.D. et al. (1987) A large solid angle detector for medium energy charged particles. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 262(2-3), pp. 347-352.

Anthony, I. et al. (1987) Tagged photon measurements of correlated neutron-proton pairs from the 12C(gamma,pn) reaction. In: 5th Miniconference on Non-Nucleonic Degrees of Freedom in Intermediate Energy Electron-Nucleus Scattering, Amsterdam, Nov 1987, pp. 215-216.

## 1986

Annand, J.R.M. et al. (1986) The reaction D(γp)n at intermediate energies. In: International Nuclear Physics Conference, Harrogate, UK, 25-30 Aug 1986, p. 16.

Anthony, I. et al. (1986) Tagged photon measurements of correlated neutron-proton pairs from the 12C(gamma,np) reaction. In: International Nuclear Physics Conference, Harrogate, UK, 25-30 Aug 1986, p. 335.

## 1985

Anthony, I. et al. (1985) A tagged photon spectrometer for the mainz 180 MeV microtron. In: 11th Europhysics Divisional Conference on Nuclear Physics with Electromagnetic Probes, Paris, France, 1-5 Jul 1985, p. 321.

This list was generated on Tue Sep 28 20:51:52 2021 BST.
Number of items: 110.

## Articles

Sokhoyan, V. et al. (2020) Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead. Physics Letters B, 802, 135243.

Briscoe, W. J. et al. (2019) Cross section for γn → π0n measured at the Mainz A2 experiment. Physical Review C, 100(6), 065205.

Akondi, C. S. et al. (2019) Experimental study of the γp→K0Σ+, γn→K0Λ, and γn→K0Σ0 reactions at the Mainz Microtron. European Physical Journal A, 55(11), 202.

Adlarson, P. et al. (2018) Measurement of the decay η′→π0π0η at MAMI. Physical Review D, 98, 012001.

Dieterle, M. et al. (2018) Photoproduction of π0 mesons off protons and neutrons in the second and third nucleon resonance region. Physical Review C, 97, 065205.

Prakhov, S. et al. (2018) High-statistics measurement of the η→3π0 decay at the Mainz Microtron. Physical Review C, 97, 065203.

Prakhov, S. et al. (2018) High-statistics measurement of the η → 3π0 decay at MAMI. Physical Review C, 97, 065203.

Sokhoyan, V. et al. (2018) Experimental study of the γp→π0ηp reaction with the A2 setup at the Mainz Microtron. Physical Review C, 97, 055212.

Kashevarov, V.L. et al. (2017) Study of η and η' photoproduction at MAMI. Physical Review Letters, 118(21), 212001. (PMID:28598665)

Adlarson, P. et al. (2017) Measurement of the ω→π0e+e− and η→e+e−γ Dalitz decays with the A2 setup at the Mainz Microtron. Physical Review C, 95, 035208.

Adlarson, P. et al. (2017) Measurement of the π0→e+e−γ Dalitz decay at the Mainz Microtron. Physical Review C, 95(2), 025202.

Gardner, S. et al. (2016) Photon asymmetry measurements of γp → π0p for Eγ = 320–650 MeV. European Physical Journal A, 52, 333.

Käser, A. et al. (2016) Photoproduction of ηπ pairs off nucleons and deuterons. European Physical Journal A, 52(9), 272.

Dieterle, M. et al. (2015) Photoproduction of π0-pairs off protons and off neutrons. European Physical Journal A, 51(11), 142.

Al Jebali, R. A.I. et al. (2015) A helium gas scintillator active target for photoreaction measurements. European Physical Journal A, 51, 123.

Käser, A. et al. (2015) The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region. Physics Letters B, 748, pp. 244-250.

Adlarson, P. et al. (2015) Measurement of π0 photoproduction on the proton at MAMI C. Physical Review C, 92(2), 024617.

Strakovsky, I. I. et al. (2015) Photoproduction of the ωmeson on the proton near threshold. Physical Review C, 91(4), 045207.

Costanza, S. et al. (2014) Helicity dependence of the γ 3He → πX reactions in the Δ(1232) resonance region. European Physical Journal A, 50(173), -173:.

Jude, T.C. et al. (2014) $K+Λ$ and $K+Σ0$ photoproduction with fine center-of-mass energy resolution. Physics Letters B, 735, pp. 112-118.

Werthmüller, D. et al. (2014) Quasifree photoproduction of η mesons off protons and neutrons. Physical Review C, 90(1), 015205.

Tarbert, C. M. et al. (2014) The neutron skin of 208Pb from coherent pion photoproduction. Physical Review Letters, 112(24), p. 242502.

Aguar-Bartolomé, P. et al. (2014) New determination of the η transition form factor in the Dalitz decay η→e+e−γ with the Crystal Ball/TAPS detectors at the Mainz Microtron. Physical Review C, 89(4), 044608.

Dieterle, M. et al. (2014) Photoproduction of π0 mesons off neutrons in the nucleon resonance region. Physical Review Letters, 112(14), p. 142001.

Oberle, M. et al. (2014) Measurement of the beam-helicity asymmetry I⊙ in the photoproduction of pi0 pi±- pairs off the protons and off the neutrons. European Physical Journal A, 50, p. 54.

Nikolaev, A. et al. (2014) Determination of the η mass with the Crystal Ball at MAMI-B. European Physical Journal A, 50(3), p. 58.

Sikora, M.H. et al. (2014) Measurement of the H1(γ, p→)π0 reaction using a novel nucleon spin polarimeter. Physical Review Letters, 112(2), 022501.

Werthmueller, D. et al. (2013) Narrow structure in the excitation function of η photoproduction off the neutron. Physical Review Letters, 111(23), Art. 232001. (PMID:24476257)

Witthauer, L. et al. (2013) Quasi-free photoproduction of η-mesons off 3He nuclei. European Physical Journal A, 49(154),

Thiel, M. et al. (2013) In-medium modifications of the ω meson near the production threshold. European Physical Journal A, 49(132),

Bartolome, P. et al. (2013) First measurement of the helicity dependence of He-3 photoreactions in the Delta(1232) resonance region. Physics Letters B, 723(1-3), pp. 71-77.

Robinson, J. et al. (2013) Measurements of 12C(→γ,pp) photon asymmetries for Eγ= 200–450 MeV. European Physical Journal A, 49(65),

Maghrbi, Y. et al. (2013) Coherent photoproduction of π0- and η-mesons off 7Li. European Physical Journal A, 49(38),

Schmidt, A. et al. (2013) Erratum: test of low-energy theorems for H1(γ→ ,π0)H1 in the threshold region [Phys. Rev. Lett. 87, 232501 (2001)]. Physical Review Letters, 110(3), Art. 039903(E).

Zehr, F. et al. (2012) Photoproduction of π0π0 - and π0π+ -pairs off the proton from threshold to the second resonance region. European Physical Journal A, 48(98),

Kashevarov, V. L. et al. (2012) Experimental study of the γp→π0π0p reaction with the Crystal Ball/TAPS detector system at the Mainz Microtron. Physical Review C, 85(6), Art. 064610.

Pheron, F. et al. (2012) Coherent photoproduction of η-mesons off 3He – search for η-mesic nuclei. Physics Letters B, 709(1-2), pp. 21-27.

Glazier, D.I. et al. (2012) Angular distribution of coherent bremsstrahlung. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 664(1), pp. 132-139.

McNicoll, E. F. et al. (2011) Erratum: experimental study of the γp→ηp reaction with the crystal ball detector at the Mainz Microtron (MAMI-C) [Phys. Rev. C 82, 035208 (2010)]. Physical Review C, 84(2), Art. 029901(E).

Berghäuser, H. et al. (2011) Determination of the η-transition form factor in the γp→pη→pγe+e reaction. Physics Letters B, 701(5), pp. 562-567.

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## Book Sections

Laing, M. et al. (1997) Exclusive charged pion photo-production in 12C. In: Li, L.F., Phua, K.K., Wong, S.S.M. and Young, B.L. (eds.) Looking to the 21st Century: Proceedings of the First International Conference on Frontiers of Physics : Joint Meeting of the Chinese Physical Societies Shantou, China 5-9 August. World Scientific, pp. 646-651.

Annand, J. et al. (1988) Deuteron photodisintegration cross-sections 50-155 MeV. In: Drechsel, D. and Walcher, T. (eds.) Physics with MAMI-A. Institut fuer Kernphysik, Johannes Gutenberg Universitaet Mainz: Mainz, Germany, pp. 60-66.

Dancer, S.N. et al. (1988) (gamma,np) reactions in 12C , 6Li and 3,4He. In: Drechsel, D. and Walcher, T. (eds.) Physics with MAMI-A. Institut fuer Kernphysik, Johannes Gutenberg Universitaet Mainz: Mainz, Germany, pp. 46-59.

## Research Reports or Papers

Annand, J.R.M. et al. (1997) Population of states in 15O following the 16O(γ,n) reaction. Project Report. University of Lund. (Unpublished)

## Conference Proceedings

Grabmayr, P. et al. (1997) Mechanisms of the 12C(gamma,NN) reactions at Egamma = 114 - 600 MeV. In: 14th International Conference on Particles and Nuclei, Williamsburg, VA, USA, 22 -28 May 1996, pp. 296-297.

Liang, M. et al. (1997) Quasifree pion photo-production and FSI in the nuclear medium at delta-resonance energies. In: 14th International Conference on Particles and Nuclei, Williamsburg, VA, USA, 22 -28 May 1996, pp. 298-300.

Grabmayr, P. et al. (1993) Photoabsorption and correlated nucleon pairs. In: 8th Miniconference on Correlations in Hadronic Systems, Amsterdam, The Netherlands, 9-10 Dec 1993, pp. 1-6.

Grabmayr, P. et al. (1993) Kinematically complete studies of the 6Li(gamma,np) reaction. In: 13th International Conference on Particles and Nuclei, Perugia, Italy, 28 Jun - 2 Jul 1993, pp. 388-389.

Krusche, B. et al. (1993) Study of N* resonances by eta photoproduction. In: 13th International Conference on Particles and Nuclei, Perugia, Italy, 28 Jun - 2 Jul 1993, p. 408.

McGeorge, J.C. et al. (1993) The (gamma,pn) and (gamma,pp) reactions in 12C. In: 13th International Conference on Particles and Nuclei, Perugia, Italy, 28 Jun - 2 Jul 1993, pp. 418-419.

Audit, G. et al. (1992) The DAPHNE project at Mainz MAMI-B. In: Seventh Course and the Second Winter Course of the International School of Intermediate Energy Nuclear Physics, L'Aquila, Italy, 16-26 Jul 1990, pp. 500-502.

Terzoudi, P. et al. (1992) Study of the (gamma,pi n) reaction on complex nuclei in the Delta-resonance region. In: International Conference on New Nuclear Physics With Advanced Techniques, Ierapetra, Greece, 23-29 Jun 1991, pp. 62-70.

Vogt, J. et al. (1988) 6Li(γ,np)alpha for 80 MeV < Eγ < 160 MeV. In: 3rd Workshop on Perspectives in Nuclear Physics at Intermediate Energies, Trieste, Italy, 18-22 May 1987, pp. 633-641.

Anthony, I. et al. (1987) Tagged photon measurements of correlated neutron-proton pairs from the 12C(gamma,pn) reaction. In: 5th Miniconference on Non-Nucleonic Degrees of Freedom in Intermediate Energy Electron-Nucleus Scattering, Amsterdam, Nov 1987, pp. 215-216.

Annand, J.R.M. et al. (1986) The reaction D(γp)n at intermediate energies. In: International Nuclear Physics Conference, Harrogate, UK, 25-30 Aug 1986, p. 16.

Anthony, I. et al. (1986) Tagged photon measurements of correlated neutron-proton pairs from the 12C(gamma,np) reaction. In: International Nuclear Physics Conference, Harrogate, UK, 25-30 Aug 1986, p. 335.

Anthony, I. et al. (1985) A tagged photon spectrometer for the mainz 180 MeV microtron. In: 11th Europhysics Divisional Conference on Nuclear Physics with Electromagnetic Probes, Paris, France, 1-5 Jul 1985, p. 321.

## Key Findings

Oberle, M. et al. (2013) Measurement of the beam-helicity asymmetry I in the photoproduction of π0-pairs off the proton and off the neutron. [Key Findings]

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