Small angle pp scattering at energies from 650 to 1000 MeV

Dobrovolsky, A. V.; Khanzadeev, A.; Korolev, G.A.; Maev, E. M.; Medvedev, V.I.; Sokolov, G.L.; Terentyev, N.; Terrien, Y.; Velichko, G.N.; Vorobyov, A. A.; Zalite, Yu

doi:10.1016/0550-3213(83)90163-3

Cited by 48 publications

(36 citation statements)

References 39 publications

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“…DATA ANALYSIS Figure 2 gives the differential cross sections for proton elastic scattering on nuclei of the isotopes 6,8,9,11 Li according to measurements in inverse kinematics at the energy of E p = 0.7 GeV [15]. In order to obtain information about the nuclear-density distributions, the cross sections calculated by the formulas of the Glauber-Sitenko theory that involve the free nucleon-nucleon scattering amplitude whose parameters were fitted to experimental data and to a partial-wave analysis data on nucleon-nucleon scattering were compared with the cross sections measured experimentally.…”

Section: Methodsmentioning

confidence: 99%

“…In order to study exotic nuclei, it was proposed at the Petersburg Nuclear Physics Institute (PNPI) [5] to perform experiments in inverse kinematics, in which case beams of exotic nuclei are scattered on a hydrogen target, using the IKAR ionization spectrometer developed and fabricated at PNPI. Earlier, the IKAR spectrometer [6,7] was successfully used in experiments on small-angle elastic hadron scattering [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…An analysis of the shape of the measured cross sections makes it possible to determine both the size of the nuclear core and the size of the nuclear halo. In a series of experiments performed in beams from the GSI (Gesellschaft f¨ur Schwerionenforschung, Darmstadt, Germany) accelerator, the PNPI-GSI Collaboration measured the cross sections dσ/dt for proton elastic scattering on stable 4 Не and 6 Li nuclei and on radioactive neutron-rich 6 Не, 8 Не, 8 Li, 9 Li, 11 Li, 12 Be, and 14 Ве nuclei [12][13][14][15][16] at an energy of 0.7 GeV per nucleon in the momentum-transfer range of 0.002 |t| 0.05 (GeV/с) 2 . An analysis of the data yielded parameters of the distribution of nuclear matter in these nuclei.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the structure of light exotic nuclei by proton elastic scattering in inverse kinematics

et al. 2015

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In order to study the spatial structure of exotic nuclei, it was proposed at the Petersburg Nuclear Physics Institute (PNPI) to measure the differential cross section for small-angle proton elastic scattering in inverse kinematics. Several experiments in beams of 0.7-GeV/nucleon exotic nuclei were performed at the heavy-ion accelerator facility of GSI (Gesellschaft f¨ur Schwerionenforschung, Darmstadt, Germany) by using the IKAR ionization spectrometer developed at PNPI. The IKAR ionization chamber filled with hydrogen at a pressure of 10 bar served simultaneously as a target and as a recoil-proton detector, which measured the recoil-proton energy. The beam-particle scattering angle was also measured. The results obtained for the cross sections in question were analyzed on the basis of the Glauber-Sitenko theory using phenomenological nuclear-density distributions with two free parameters. Nuclear-matter distributions and root-mean-square radii were found for the nuclei under investigation. The size of the halo in the 6 Не, 8 Не, 11 Li, and 14 Ве nuclei was determined among other things. Information about neutron distributions in nuclei was deduced by combining the data obtained here with the known values of the radii of proton distributions. A sizable neutron skin was revealed in the 8 Li, 9 Li, and 12 Be nuclei.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the structure of light exotic nuclei by proton elastic scattering in inverse kinematics

et al. 2015

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“…At large p, the scattering amplitude f p (k t ) extracted from the measured NN cross section is usually parametrized in the form [9] …”

Section: Theorymentioning

confidence: 99%

Nuclear transparency from quasielasticC12(e,e'p

Rohe¹,

Benhar²,

Armstrong³

et al. 2005

Phys. Rev. C

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We studied the reaction 12 C(e,e'p) in quasielastic kinematics at momentum transfers between 0.6 and 1.8 (GeV/c) 2 covering the single-particle region. From this the nuclear transparency factors are extracted using two methods. The results are compared to theoretical predictions obtained using a generalization of Glauber theory described in this paper. Furthermore, the momentum distribution in the region of the 1s-state up to momenta of 300 MeV/c is obtained from the data and compared to the Correlated Basis Function theory and the Independent-Particle Shell model.

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“…Active targets and Time Projection Chambers (TPC) were introduced in nuclear physics about 20 years ago with the detector IKAR [1,2] in GSI. It was followed by the MAYA active target at GANIL [3][4][5] and the CENBG TPC [6,7] used for decay studies.…”

Section: Introductionmentioning

confidence: 99%

MICROMEGAS calibration for ACTAR TPC

et al. 2018

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Abstract. Active targets, such as the ACtive TARget and Time Projection Chamber (ACTAR TPC) being developed at GANIL, are detection systems that operate on the basis of a time projection chamber but where the filling gas also serves as a thick target for nuclear reactions. In nuclear physics experiments, the energy resolution is of primary importance to identify the reaction products and to precisely reconstruct level schemes of nuclei. These measurements are based on the energy deposited on a pixelated pad plane. A MICROMEGAS detector is used in ACTAR TPC for the ionization electron collection and amplification, and it is a major contributor to the energy dispersion through, for example, inhomogeneities of the amplification gap. A variation of one percent in the gap can lead to an amplitude variation of more than two percent which is of the same order as the resolution obtained with an energy deposition of 5 MeV. One way to calibrate the pad plane is through the use of a two dimensional source scanning table. It is used to calibrate the gain inhomogeneities and, using MAGBOLTZ calculations, deduce the corresponding gap variations. The inverse of this method would allow the relative gain variations to be calculated for the different gas mixtures and pressures used in experiments with ACTAR TPC.

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Small angle pp scattering at energies from 650 to 1000 MeV

Cited by 48 publications

References 39 publications

Investigation of the structure of light exotic nuclei by proton elastic scattering in inverse kinematics

Investigation of the structure of light exotic nuclei by proton elastic scattering in inverse kinematics

Nuclear transparency from quasielasticC12(e,e'p

MICROMEGAS calibration for ACTAR TPC

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