Response of TAPS to monochromatic photons with energies between 45 and 790 MeV

Gabler, A.R.; Döring, Werner; Fuchs, Markus; Krusche, B.; Metag, [No Value]; Novotny, R.; Röbig-Landau, M.; Ströher, H.; Molenaar, C.G.; Löhner, H.; Vanpol, J; Raschke, A; Šumbera, M.; Venema, L.B.; Wilschut, H. W.; Averbeck, R.; Niebur, W.; Schubert, András; Simon, R. S.; Beck, R.; Peise, J.; Miller, G.J.; Owens, R.O.; Anton, G.

doi:10.1016/0168-9002(94)90701-3

Cited by 206 publications

(35 citation statements)

References 12 publications

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“…Decay photons from mesons produced in the target were registered in the combined Crystal Barrel (CB) and MiniTAPS detector system. The CB detector [30] [31,32] at a distance of 210 cm from the center of the CB, consisting of 216 BaF 2 crystals, read out via PMTs with electronics described in [33]. The high granularity and the large solid angle coverage made the detector system ideally suited for the detection and reconstruction of multiphoton events.…”

Section: Methodsmentioning

confidence: 99%

Determination of the real part of theη′-Nb optical potential

Nanova¹,

Friedrich²,

Metag³

et al. 2016

Phys. Rev. C

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ReuseItems deposited in White Rose Research Online are protected by copyright, with all rights reserved unless indicated otherwise. They may be downloaded and/or printed for private study, or other acts as permitted by national copyright laws. The publisher or other rights holders may allow further reproduction and re-use of the full text version. This is indicated by the licence information on the White Rose Research Online record for the item. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request.PHYSICAL REVIEW C 94, 025205 (2016) Determination of the real part of the η ′ -Nb optical potential The excitation function and momentum distribution of η ′ mesons have been measured in photoproduction off 93 Nb in the energy range of 1.2-2.9 GeV. The experiment has been performed with the combined Crystal Barrel and MiniTAPS detector system, using tagged photon beams from the ELSA electron accelerator. Information on the sign and magnitude of the real part of the η ′ -Nb potential has been extracted from a comparison of the data with model calculations. An attractive potential of −(41 ± 10(stat) ± 15(syst)) MeV depth at normal nuclear matter density is deduced within model uncertainties. This value is consistent with the potential depth of −(37 ± 10(stat) ± 10(syst)) MeV obtained in an earlier measurement for a light nucleus (carbon). This relatively shallow η ′ -nucleus potential will make the search for η ′ -nucleus bound states more difficult.

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Section: Methodsmentioning

confidence: 99%

Determination of the real part of theη′-Nb optical potential

Nanova¹,

Friedrich²,

Metag³

et al. 2016

Phys. Rev. C

Self Cite

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“…Channel-wise spectra containing the cluster-charge are generated and rela- 6.6 % 4.0 % 41. 6 6.4 % 3.6 % tive gain factors normalized to the median value of all 10254 channels are calculated by comparing the peak positions for each channel. Using this method, a much faster and more stable convergence was achieved than with the leader-pad method while delivering comparable results.…”

Section: Tpc Energy Calibrationmentioning

confidence: 99%

Timing and tracking for the Crystal Barrel detector

2017

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Abstract. The aim of the project D.3 is the upgrade of several detector components used in the CBELSA/TAPS experiment at ELSA. The readout of the Crystal Barrel Calorimeter will be extended by a timing branch in order to gain trigger capability for the detector, which will allow to measure completely neutral final states in photoproduction reactions (see projects A.1 and C.5). Additionally, the readout of the inner crystals of the TAPS detector, which covers the forward opening of the Crystal Barrel Calorimeter, will be modified to be capable of high event rates due to the intensity upgrade of ELSA. Furthermore, a full-scale prototype Time Projection Chamber (TPC) has been built to be used as a new central tracker for the CBELSA/TAPS experiment at ELSA and the FOPI experiment at GSI.

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“…The main components of the detector system are the Crystal Ball (CB) [23] and the TAPS [24,25] calorimeter. The CB detector, consisting of 672 NaI detector elements, and the TAPS detector, made of 366 BaF 2 and 72 PbWO 4 elements, cover together 97% of the full solid angle.…”

Section: Coherent π 0 Photoproduction and Experimental Setupmentioning

confidence: 99%

Neutron skin studies in heavy nuclei with coherent p0 photo-production

Bondy¹

2015

Proceedings of 53rd International Winter Meeting on Nuclear Physics — PoS(Bormio2015)

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The charge distribution of nuclei is known with very high accuracy, i.e. in electron scattering experiments, conversely, the mass distribution is experimentally less accessible and therefore less precisely known. An accurate determination of the neutron density distribution is of particular interest. Especially in nuclei with N » Z, a strong neutron skin is expected, since the excess neutrons are pushed outwards against surface tension by the Coulomb forces. With the precise experimental determination of the neutron skin thickness essential constraints for the nuclear equation of state (EOS) can be provided and thus allowing to draw conclusions on the size of neutron stars. The method of coherent π 0 photoproduction, A(γ, π 0 )A, provides a powerful tool to determine the mass distribution of various nuclei. In a novel experimental campaign carried out in 2012 within the A2 collaboration at the Mainz Microtron (MAMI), five nuclei have been measured: 58 Ni, 116,120,124 Sn, 208 Pb. The tin targets are of special interest because most of the systematic errors due to pion-nucleon interaction can be neglected, and they allow a precise investigation along an isotopic chain. First results of these studies will be discussed.

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Response of TAPS to monochromatic photons with energies between 45 and 790 MeV

Cited by 206 publications

References 12 publications

Determination of the real part of theη′-Nb optical potential

Determination of the real part of theη′-Nb optical potential

Timing and tracking for the Crystal Barrel detector

Neutron skin studies in heavy nuclei with coherent p0 photo-production

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