Knockout of proton-neutron pairs from $^{16}$O with electromagnetic probes (2009)
Middleton, D. G., Annand, J. R. M., Barbieri, C., Giusti, C., Grabmayr, P., Hehl, T., ...
After recent improvements to the Pavia model of two-nucleon knockout from $^{16}$O with electromagnetic probes the calculated cross sections are compared to experimental data from such reactions....
Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton (2009)
Krambrich, D., Zehr, F., Fix, A., Roca, L., Aguar, P., Ahrens, J., ...
Beam-helicity asymmetries have been measured at the MAMI accelerator in Mainz in the three isospin channels $\vec{\gamma}p\to \pi^{+}\pi^0n$, $\vec{\gamma}p\to \pi^{0}\pi^0p$ and $\vec{\gamma}p\to...
Investigation of the Exclusive ^{3}He(e,e'pn)p Reaction (2009)
Middleton, D. G., Annand, J. R. M., Antelo, M. Ases, Ayerbe, C., Barneo, P., Baumann, D., ...
Cross sections for the ^{3}He(e,e'pn)p reaction were measured for the first time at energy transfers of 220 and 270 MeV for several momentum transfers ranging from 300 to 450 MeV/c. Cross sections...
Photoproduction of pi^0 eta on protons and the Delta(1700)D_{33} resonance (2009)
Kashevarov, V. L., Fix, A., Aguar-Bartolome, P., Akasoy, L. K., Annand, J. R. M., Arends, H. J., ...
Total and differential cross sections for the reaction gamma p -> pi^o eta p have been measured with the Crystal Ball/TAPS detector using the tagged photon facility at the MAMI C accelerator in...
Unverzagt, M., Aguar-Bartolome, P., Ahrens, J., Annand, J. R. M., Arends, H. J., Beck, R., ...
A precise measurement of the Dalitz plot parameter, alpha, for the eta->3pi^0 decay is presented. The experiment was performed with the Crystal Ball and TAPS large acceptance photon detectors at the...
Prakhov, S., Nefkens, B. M. K., Aguar-Bartolome, P., Akasoy, L. K., Annand, J. R. M., Arends, H. J., ...
The dynamics of the $\eta\to 3\pi^0$ decay have been studied with the Crystal Ball multiphoton spectrometer and the TAPS calorimeter. Bremsstrahlung photons produced by the 1.5 GeV electron beam of...
He-3(e,e'pp) and He-3(e,e'pn) reactions at AmPS and MAMI (2008)
Middleton, D.G., Annand, J.R.M., Ases Antelo, M., Ayerbe, C., Barneo, P., Baumann, D., ...
This paper reports on measurements of the He-3(e,e'pp) reaction measured at AmPS and the He-3(e,e'pn) reaction measured at MAMI. The measurements were performed in similar kinematics to allow a...
Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C (2007)
McGeorge, J. C., Kellie, J. D., Annand, J. R. M., Ahrens, J., Anthony, I., Clarkson, A., ...
The Glasgow photon tagging spectrometer at Mainz has been upgraded so that it can be used with the 1500 MeV electron beam now available from the Mainz microtron MAMI-C. The changes made and the...
Incoherent pion photoproduction on $^{12}$C (2007)
Tarbert, C. M., Watts, D. P., Aguar, P., Ahrens, J., Annand, J. R. M., Arends, H. J., ...
We present the first detailed measurement of incoherent photoproduction of neutral pions to a discrete state of a residual nucleus. The $^{12}$C$(\gamma,\pi^{0})^{12}$C$^{*}_{4.4MeV}$ reaction has...
Double pion photoproduction off 40Ca (2007)
Bloch, F., Ahrens, J., Annand, J. R. M., Beck, R., Fog, L. S., Hornidge, D., ...
The photoproduction of pi0pi0 and pi0pi+/- pairs off 40Ca has been investigated with the TAPS detector using the Glasgow photon tagging spectrometer at the Mainz MAMI accelerator. Data have been...
First measurements of the ^16O(e,e'pn)^14N reaction (2007)
Middleton, D. G., Annand, J. R. M., Barbieri, C., Barneo, P., Bartsch, P., Bauman, D., ...
This paper reports on the first measurement of the ^16O(e,e'pn)^14N reaction. Data were measured in kinematics centred on a super-parallel geometry at energy and momentum transfers of 215 MeV and 316...
Dependence of the $^{12}$C($\vec{\gamma}$,pd) reaction on photon linear polarisation (2005)
Watts, D. P., Annand, J. R. M., Beck, R., Branford, D., Glazier, D., Grabmayr, P., ...
The sensitivity of the $^{12}$C$(\vec{\gamma},pd)$ reaction to photon linear polarisation has been determined at MAMI, giving the first measurement of the reaction for a nucleus heavier than...
Measurement of the Electric Form Factor of the Neutron at Q^2 = 0.3-0.8 (GeV/c)^2 (2004)
Glazier, D. I., Seimetz, M., Annand, J. R. M., Arenhövel, H., Antelo, M. Ases, Ayerbe, C., ...
The electric form factor of the neutron, G_En, has been measured at the Mainz Microtron by recoil polarimetry in the quasielastic D(e_pol,e'n_pol)p reaction. Three data points have been extracted at...
Measurement of the pi^+ meson polarizabilities via the gamma p->gamma pi^+ n reaction (2004)
Ahrens, J., Alexeev, V. M., Annand, J. R. M., Arends, H. J., Beck, R., Caselotti, G., ...
An experiment on the radiative pi^+ meson photoproduction from the proton (gamma p->gamma pi^+ n) was carried out at the Mainz Microtron MAMI in the kinematic region 537 MeV
Photoproduction of pi0-mesons from nuclei (2004)
Krusche, B., Lehr, J., Ahrens, J., Annand, J. R. M., Beck, R., Bloch, F., ...
Photoproduction of neutral pions from nuclei (carbon, calcium, niobium, lead) has been studied for incident photon energies from 200 MeV to 800 MeV with the TAPS detector using the Glasgow photon...
Basic instrumentation for Hall A at Jefferson Lab (2004)
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
Basic instrumentation for Hall A at Jefferson Lab (2004)
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
Double pi0 photoproduction off the proton at threshold (2004)
Kotulla, M., Ahrens, J., Annand, J.R.M., Beck, R., Hornidge, D., Janssen, S., ...
The reaction gammap → pi(0)pi(0)p has been measured using the TAPS BaF2 calorimeter at the tagged photon facility of the Mainz Microtron accelerator. Chiral perturbation theory (ChPT) predicts that...
Basic instrumentation for Hall A at Jefferson Lab (2004)
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo- induced reactions at very high luminosity and good momentum and angular...
Neutron spectra in a tissue equivalent phantom during photon radiotherapy treatment by LINACS (2004)
Zanini, A., Durisi, E., Fasolo, F., Visca, L., Ongaro, C., Nastasi, U., ...
Bremsstrahlung photon beams produced by LINAC accelerators are currently the most used radiotherapy method for tumour treatments. When the photon energy exceeds the (γ,n) reaction threshold energy,...
Photoproduction of eta-mesic 3He (2003)
Pfeiffer, M., Ahrens, J., Annand, J. R. M., Beck, R., Caselotti, G., Cherepnya, S., ...
The photoproduction of eta-mesic 3He has been investigated using the TAPS calorimeter at the Mainz Microtron accelerator facility MAMI. The total inclusive cross section for the reaction...
Double $\pi^0$ Photoproduction off the Proton at Threshold (2003)
Kotulla, M., Ahrens, J., Annand, J. R. M., Beck, R., Hornidge, D., Janssen, S., ...
The reaction $\gamma p \to \pi^0 \pi^0 p$ has been measured using the TAPS BaF$_2$ calorimeter at the tagged photon facility of the Mainz Microtron accelerator. Chiral perturbation theory (ChPT)...
Quasi-free $\pi^0$ Photoproduction from the Bound Nucleon (2003)
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J. R. M., ...
Differential cross-sections for quasi-free $\pi^0$ photoproduction from the proton and neutron bound in the deuteron have been measured for $E_\gamma= 200 - 400$ MeV at $\theta^{\rm lab}_\gamma =...
First measurement of the helicity-dependent gamma p to p eta differential cross-section (2003)
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the gamma p to p eta reaction has been measured for the first time at a center-of-mass angle theta /sub eta //sup */=70 degrees in the photon energy range from 780 MeV to...
Threshold enhancement in eta photoproduction from 2H and 4He (2003)
Hejny, V., Weiss, J., Achenbach, P., Ahrens, J., Annand, J. R. M., Beck, R., ...
The photoproduction of eta-mesons from 2H and 4He has been studied for energies close to the production thresholds. The experiments were carried out with the tagged photon beam of the Mainz MAMI...
Exclusive measurement of coherent eta photoproduction from the deuteron (2003)
Weiss, J., Achenbach, P., Ahrens, J., Annand, J. R. M., Beck, R., Hejny, V., ...
Coherent photoproduction of eta mesons from the deuteron has been measured from threshold up to incident photon energies of 750 MeV using the photon spectrometer TAPS at the tagged photon facility at...
Quasi-free Compton scattering and the polarizabilities of the neutron (2003)
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J.R.M., Arends, H.J., ...
Differential cross-sections for quasi-free Compton scattering from the proton and neutron bound in the deuteron have been measured using the Glasgow/Mainz photon tagging spectrometer at the Mainz...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the total cross section for the gamma p to n pi /sup +/ pi /sup 0/ reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The...
Three-nucleon mechanisms in photoreactions (2003)
Watts, D.P., Ahrens, J., Annand, J.R.M., Beck, R., Branford, D., Grabmayr, P., ...
The /sup 12/C( gamma , ppn) reaction has been measured for E/sub gamma /=150-800 MeV in the first study of this reaction in a target heavier than /sup 3/He. The experimental data are compared to a...
Photoneutron yields from tungsten in the energy range of the giant dipole resonance (2003)
Akkurt, I., Adler, J.O., Annand, J.R.M., Fasolo, F., Hansen, K., Isaksson, L., ...
Photoneutron production on the nuclei of high-Z components of medical accelerator heads can lead to a significant secondary dose during a course of bremsstrahlung radiotherapy, However, a...
Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., ...
We have measured the proton recoil polarization in the He-4((e) over right arrow ,e(')(p) over right arrow)H-4 reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization...
Three-nucleon mechanisms in photoreactions (2002)
Watts, D. P., Ahrens, J., Annand, J. R. M, Beck, R., Branford, D., Grabmayr, P., ...
The $^{12}$C$(\gamma,ppn)$ reaction has been measured for E$_{\gamma}$=150-800 MeV in the first study of this reaction in a target heavier than $^3$He. The experimental data are compared to a...
Kotulla, M., Ahrens, J., Annand, J. R. M., Beck, R., Caselotti, G., Fog, L. S., ...
The reaction $\gamma p \to \pi^\circ \gamma^\prime p$ has been measured with the TAPS calorimeter at the Mainz Microtron accelerator facility MAMI for energies between $\sqrt{s}$ = 1221--1331 MeV....
Quasi-free Compton Scattering and the Polarizabilities of the Neutron (2002)
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J. R. M., ...
Differential cross sections for quasi-free Compton scattering from the proton and neutron bound in the deuteron have been measured using the Glasgow/Mainz tagging spectrometer at the Mainz MAMI...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the (γ) over right arrow(p) over right arrow →ppi(0) reaction has been measured for the first time in the photon-energy range from 550 to 790 MeV. The experiment,...
Branford, D., Arneil, J.F., MacKenzie, J.A., Fohl, K., Ahrens, J., Annand, J.R.M., ...
Measurements of the He-4(gamma,pi(+)n)H-3 and He- 4(gamma,pi(+)p)nnn reactions in quasifree pi production kinematic regimes have been performed using unpolarized and linearly polarized tagged photons...
Threshold enhancement in eta photoproduction from H-2 and He-4 (2002)
Hejny, V., Weiss, J., Achenbach, P., Ahrens, J., Annand, J.R.M., Beck, R., ...
The photoproduction of eta-mesons from H-2 and He-4 has been studied for energies close to the production thresholds. The experiments were carried out with the tagged photon beam of the Mainz MAMI...
Neutron polarizabilities investigated by quasifree Compton scattering from the deuteron (2002)
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J.R.M., Arends, H.J., ...
Measuring Compton scattered photons and recoil neutrons in coincidence, quasifree Compton scattering by the neutron has been investigated at MAMI (Mainz) at theta(gamma)(lab) = 136degrees in an...
First measurement of the Gerasimov-Drell-Hearn integral for 1H from 200 to 800 MeV (2001)
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
A direct measurement of the helicity dependence of the total photoabsorption cross section an the proton was carried out at MAMI (Mainz) in the energy range 200 lt E-[gamma] lt 800 MeV. The...
Powrie, C.J.Y., McGeorge, J.C., MacGregor, I.J.D., Ahrens, J., Annand, J.R.M., Arneil, J.F., ...
The C-12([([gamma])over right arrow], pp) and C- 12([([gamma])over right arrow], pn) reactions have been studied for E-gamma = 160-350 MeV using linearly polarized photons from the Glasgow tagged...
Exclusive measurement of coherent eta -photoproduction from the deuteron (2001)
Weiss, J., Achenbach, P., Ahrens, J., Annand, J.R.M., Beck, R., Hejny, V., ...
Coherent photoproduction of eta -mesons from the deuteron has been measured from threshold up to E/sub gamma / approximately=750 MeV using the photon spectrometer TAPS at the tagged photon facility...
Beck, R., Krahn, H.P., Ahrens, J., Annand, J.R.M., Arends, H.J., Audit, G., ...
Tagged linearly polarized photons have been used at the Mainz Microtron (MAMI) for simultaneous measurements of the p( gamma ,p) pi /sup 0/ and p( gamma , pi /sup +/)n reaction channels to study the...
Nuclear pion photoproduction in the Delta resonance region (2000)
Branford, D., MacKenzie, J.A., Lee, F.X., Ahrens, J., Annand, J.R.M., Beck, R., ...
A measurement of the /sup 12/C( gamma , pi /sup +/n)/sup 11/B reaction in quasifree pi -production kinematic regimes has been performed using tagged photons in conjunction with large solid angle pi...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the single pion photoproduction on the proton has been measured in the energy range from 200 to 450 MeV for the first time. The experiment, performed at the Mainz microtron...
The 12C(gamma,NN) reaction studied over a wide kinematic range (2000)
Watts, D.P., MacGregor, I.J.D., Ahrens, J., Annand, J.R.M., Beck, R., Branford, D., ...
The12C( gamma,np) and 12C( gamma,pp) reactions have been studied using the Glasgow photon tagging spectrometer at the Mainz MAMI electron microtron for E gamma = 150-700 MeV over a kinematic range...
A Compact Solid State Detector for Small Angle Particle Tracking (1999)
Altieri, S., Barnaba, O., Braghieri, A., Cambiaghi, M., Lanza, A., Locatelli, T., ...
MIDAS (MIcrostrip Detector Array System) is a compact silicon tracking telescope for charged particles emitted at small angles in intermediate energy photonuclear reactions. It was realized to...
The scattering of 3MeV neutrons from heavy nuclei. (1982)
Thesis (Ph. D.)--University of Edinburgh, 1982.
First measurement of the helicity-dependent gamma p to p eta differential cross-section
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the gamma p to p eta reaction has been measured for the first time at a center-of-mass angle theta /sub eta //sup */=70 degrees in the photon energy range from 780 MeV to...
First measurement of the Gerasimov-Drell-Hearn integral for 1H from 200 to 800 MeV
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
A direct measurement of the helicity dependence of the total photoabsorption cross section an the proton was carried out at MAMI (Mainz) in the energy range 200 lt E-[gamma] lt 800 MeV. The...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the (γ) over right arrow(p) over right arrow →ppi(0) reaction has been measured for the first time in the photon-energy range from 550 to 790 MeV. The experiment,...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the total cross section for the gamma p to n pi /sup +/ pi /sup 0/ reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the single pion photoproduction on the proton has been measured in the energy range from 200 to 450 MeV for the first time. The experiment, performed at the Mainz microtron...
Photoneutron yields from tungsten in the energy range of the giant dipole resonance
Akkurt, I., Adler, J.O., Annand, J.R.M., Fasolo, F., Hansen, K., Isaksson, L., ...
Photoneutron production on the nuclei of high-Z components of medical accelerator heads can lead to a significant secondary dose during a course of bremsstrahlung radiotherapy, However, a...
Beck, R., Krahn, H.P., Ahrens, J., Annand, J.R.M., Arends, H.J., Audit, G., ...
Tagged linearly polarized photons have been used at the Mainz Microtron (MAMI) for simultaneous measurements of the p( gamma ,p) pi /sup 0/ and p( gamma , pi /sup +/)n reaction channels to study the...
Branford, D., Arneil, J.F., MacKenzie, J.A., Fohl, K., Ahrens, J., Annand, J.R.M., ...
Measurements of the He-4(gamma,pi(+)n)H-3 and He- 4(gamma,pi(+)p)nnn reactions in quasifree pi production kinematic regimes have been performed using unpolarized and linearly polarized tagged photons...
Nuclear pion photoproduction in the Delta resonance region
Branford, D., MacKenzie, J.A., Lee, F.X., Ahrens, J., Annand, J.R.M., Beck, R., ...
A measurement of the /sup 12/C( gamma , pi /sup +/n)/sup 11/B reaction in quasifree pi -production kinematic regimes has been performed using tagged photons in conjunction with large solid angle pi...
Threshold enhancement in eta photoproduction from H-2 and He-4
Hejny, V., Weiss, J., Achenbach, P., Ahrens, J., Annand, J.R.M., Beck, R., ...
The photoproduction of eta-mesons from H-2 and He-4 has been studied for energies close to the production thresholds. The experiments were carried out with the tagged photon beam of the Mainz MAMI...
Neutron polarizabilities investigated by quasifree Compton scattering from the deuteron
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J.R.M., Arends, H.J., ...
Measuring Compton scattered photons and recoil neutrons in coincidence, quasifree Compton scattering by the neutron has been investigated at MAMI (Mainz) at theta(gamma)(lab) = 136degrees in an...
Quasi-free Compton scattering and the polarizabilities of the neutron
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J.R.M., Arends, H.J., ...
Differential cross-sections for quasi-free Compton scattering from the proton and neutron bound in the deuteron have been measured using the Glasgow/Mainz photon tagging spectrometer at the Mainz...
Double pi0 photoproduction off the proton at threshold
Kotulla, M., Ahrens, J., Annand, J.R.M., Beck, R., Hornidge, D., Janssen, S., ...
The reaction gammap → pi(0)pi(0)p has been measured using the TAPS BaF2 calorimeter at the tagged photon facility of the Mainz Microtron accelerator. Chiral perturbation theory (ChPT) predicts that...
Powrie, C.J.Y., McGeorge, J.C., MacGregor, I.J.D., Ahrens, J., Annand, J.R.M., Arneil, J.F., ...
The C-12([([gamma])over right arrow], pp) and C- 12([([gamma])over right arrow], pn) reactions have been studied for E-gamma = 160-350 MeV using linearly polarized photons from the Glasgow tagged...
Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., ...
We have measured the proton recoil polarization in the He-4((e) over right arrow ,e(')(p) over right arrow)H-4 reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization...
The 12C(gamma,NN) reaction studied over a wide kinematic range
Watts, D.P., MacGregor, I.J.D., Ahrens, J., Annand, J.R.M., Beck, R., Branford, D., ...
The12C( gamma,np) and 12C( gamma,pp) reactions have been studied using the Glasgow photon tagging spectrometer at the Mainz MAMI electron microtron for E gamma = 150-700 MeV over a kinematic range...
Three-nucleon mechanisms in photoreactions
Watts, D.P., Ahrens, J., Annand, J.R.M., Beck, R., Branford, D., Grabmayr, P., ...
The /sup 12/C( gamma , ppn) reaction has been measured for E/sub gamma /=150-800 MeV in the first study of this reaction in a target heavier than /sup 3/He. The experimental data are compared to a...
Exclusive measurement of coherent eta -photoproduction from the deuteron
Weiss, J., Achenbach, P., Ahrens, J., Annand, J.R.M., Beck, R., Hejny, V., ...
Coherent photoproduction of eta -mesons from the deuteron has been measured from threshold up to E/sub gamma / approximately=750 MeV using the photon spectrometer TAPS at the tagged photon facility...
Basic instrumentation for Hall A at Jefferson Lab
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo- induced reactions at very high luminosity and good momentum and angular...
First measurement of the helicity-dependent gamma p to p eta differential cross-section
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the gamma p to p eta reaction has been measured for the first time at a center-of-mass angle theta /sub eta //sup */=70 degrees in the photon energy range from 780 MeV to...
First measurement of the Gerasimov-Drell-Hearn integral for 1H from 200 to 800 MeV
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
A direct measurement of the helicity dependence of the total photoabsorption cross section an the proton was carried out at MAMI (Mainz) in the energy range 200 lt E-[gamma] lt 800 MeV. The...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the (γ) over right arrow(p) over right arrow →ppi(0) reaction has been measured for the first time in the photon-energy range from 550 to 790 MeV. The experiment,...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the total cross section for the gamma p to n pi /sup +/ pi /sup 0/ reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The...
Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Aulenbacher, K., ...
The helicity dependence of the single pion photoproduction on the proton has been measured in the energy range from 200 to 450 MeV for the first time. The experiment, performed at the Mainz microtron...
Photoneutron yields from tungsten in the energy range of the giant dipole resonance
Akkurt, I., Adler, J.O., Annand, J.R.M., Fasolo, F., Hansen, K., Isaksson, L., ...
Photoneutron production on the nuclei of high-Z components of medical accelerator heads can lead to a significant secondary dose during a course of bremsstrahlung radiotherapy, However, a...
Beck, R., Krahn, H.P., Ahrens, J., Annand, J.R.M., Arends, H.J., Audit, G., ...
Tagged linearly polarized photons have been used at the Mainz Microtron (MAMI) for simultaneous measurements of the p( gamma ,p) pi /sup 0/ and p( gamma , pi /sup +/)n reaction channels to study the...
Branford, D., Arneil, J.F., MacKenzie, J.A., Fohl, K., Ahrens, J., Annand, J.R.M., ...
Measurements of the He-4(gamma,pi(+)n)H-3 and He- 4(gamma,pi(+)p)nnn reactions in quasifree pi production kinematic regimes have been performed using unpolarized and linearly polarized tagged photons...
Nuclear pion photoproduction in the Delta resonance region
Branford, D., MacKenzie, J.A., Lee, F.X., Ahrens, J., Annand, J.R.M., Beck, R., ...
A measurement of the /sup 12/C( gamma , pi /sup +/n)/sup 11/B reaction in quasifree pi -production kinematic regimes has been performed using tagged photons in conjunction with large solid angle pi...
Threshold enhancement in eta photoproduction from H-2 and He-4
Hejny, V., Weiss, J., Achenbach, P., Ahrens, J., Annand, J.R.M., Beck, R., ...
The photoproduction of eta-mesons from H-2 and He-4 has been studied for energies close to the production thresholds. The experiments were carried out with the tagged photon beam of the Mainz MAMI...
Neutron polarizabilities investigated by quasifree Compton scattering from the deuteron
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J.R.M., Arends, H.J., ...
Measuring Compton scattered photons and recoil neutrons in coincidence, quasifree Compton scattering by the neutron has been investigated at MAMI (Mainz) at theta(gamma)(lab) = 136degrees in an...
Quasi-free Compton scattering and the polarizabilities of the neutron
Kossert, K., Camen, M., Wissmann, F., Ahrens, J., Annand, J.R.M., Arends, H.J., ...
Differential cross-sections for quasi-free Compton scattering from the proton and neutron bound in the deuteron have been measured using the Glasgow/Mainz photon tagging spectrometer at the Mainz...
Double pi0 photoproduction off the proton at threshold
Kotulla, M., Ahrens, J., Annand, J.R.M., Beck, R., Hornidge, D., Janssen, S., ...
The reaction gammap → pi(0)pi(0)p has been measured using the TAPS BaF2 calorimeter at the tagged photon facility of the Mainz Microtron accelerator. Chiral perturbation theory (ChPT) predicts that...
Powrie, C.J.Y., McGeorge, J.C., MacGregor, I.J.D., Ahrens, J., Annand, J.R.M., Arneil, J.F., ...
The C-12([([gamma])over right arrow], pp) and C- 12([([gamma])over right arrow], pn) reactions have been studied for E-gamma = 160-350 MeV using linearly polarized photons from the Glasgow tagged...
Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., ...
We have measured the proton recoil polarization in the He-4((e) over right arrow ,e(')(p) over right arrow)H-4 reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization...
The 12C(gamma,NN) reaction studied over a wide kinematic range
Watts, D.P., MacGregor, I.J.D., Ahrens, J., Annand, J.R.M., Beck, R., Branford, D., ...
The12C( gamma,np) and 12C( gamma,pp) reactions have been studied using the Glasgow photon tagging spectrometer at the Mainz MAMI electron microtron for E gamma = 150-700 MeV over a kinematic range...
Three-nucleon mechanisms in photoreactions
Watts, D.P., Ahrens, J., Annand, J.R.M., Beck, R., Branford, D., Grabmayr, P., ...
The /sup 12/C( gamma , ppn) reaction has been measured for E/sub gamma /=150-800 MeV in the first study of this reaction in a target heavier than /sup 3/He. The experimental data are compared to a...
Exclusive measurement of coherent eta -photoproduction from the deuteron
Weiss, J., Achenbach, P., Ahrens, J., Annand, J.R.M., Beck, R., Hejny, V., ...
Coherent photoproduction of eta -mesons from the deuteron has been measured from threshold up to E/sub gamma / approximately=750 MeV using the photon spectrometer TAPS at the tagged photon facility...
Basic instrumentation for Hall A at Jefferson Lab
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo- induced reactions at very high luminosity and good momentum and angular...