FASA - A 4π detector setup for the investigation of target multifragmentation in nucleus-nucleus collisions

Avdeyev, S. P.; Karnaukhov, V.A.; Kuznetsov, W.D.; Petrov, L.A.; Barth, Rolf F.; Oeschler, H.; Bochkarev, O.V.; Chulkov, L. V.; Kuzmin, E. A.; Mukha, I.; Olkin, V.A.; Yan'kov, G. B.; Karcz, W.; Vidaj, Y.T.; Neubert, W.; Norbeck, E.

doi:10.1016/0168-9002(93)90752-4

Cited by 24 publications

(4 citation statements)

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“…Additionally the recoil velocities are small which facilates the determination of the velocity and angular correlations with high precision. The reaction has been studied at 1 and 3.6 GeV/nucleon incident energy at the synchrophasotron of the JINR in Dubna using the new 4π setup "FASA" [15].…”

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confidence: 99%

Freeze-out configuration in multifragmentation

Li¹,

Gross²,

Oeschler

1994

Physics Letters B

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0.5cmThe excitation energy and the nuclear density at the time of breakup are extracted for the α + 197 Au reaction at beam energies of 1 and 3.6 GeV/nucleon. These quantities are calculated from the average relative velocity of intermediate mass fragments (IMF) at large correlation angles as a function of the multiplicity of IMFs using a statistical model coupled with many-body Coulomb trajectory calculations. The Coulomb component v c and thermal component v 0 are found to depend oppositely on the excitation energy, IMFs multiplicity, and freeze-out density. These dependencies allow the determination of both the volume and the mean excitation energy at the time of breakup. It is found that the volume remained constant as the beam energy was increased, with a breakup density of about ρ 0 /7, but that the excitation energy increased 25% to about 5.5 MeV/nucleon. PACS Number 25.70.Np

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confidence: 99%

Freeze-out configuration in multifragmentation

Li¹,

Gross²,

Oeschler

1994

Physics Letters B

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“…The experiment was performed with a 4π setup FASA [23,24] installed at the external beam of the Dubna superconducting accelerator Nuclotron. FASA consists of two main parts.…”

Section: Methodsmentioning

confidence: 99%

Time scale of nuclear multifragmentation induced by light relativistic ions

Karnaukhov

Avdeyev

Botvina

et al. 2012

J. Phys. G: Nucl. Part. Phys.

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Nuclear fragmentation in a d (4.4 GeV) + Au collision was studied with a 4π setup FASA on the external beam of the Dubna Nuclotron. The IMF–IMF relative angle correlation function was analyzed using the statistical model of multifragmentation (SMM) with the main goal of estimating the total time scale of the process. It was found that the fragmentation of the hot nucleus was ∼100 fm/c delayed in respect to the collision moment.

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“…D: α particle stopped in PD1 (see Figs. 6,8,9,11). E: α particle barely punching through PD1 and stopped in CsI1 (see Figs.…”

Section: Parametermentioning

confidence: 99%

“…In order to provide the lowest possible identification threshold, the first layer of the telescope is usually made of a gas chamber (e.g. DELF [6], MULTICS [7], FASA [8], INDRA [9], ISiS [10], GARFIELD [11], FI-ASCO [12]) or of a thin Si detector (e.g. FAUST [13], INDRA [9], LASSA [14], CHIMERA [15], HiRA [16], NIMROD [17], FAZIA [18]).…”

Section: Introductionmentioning

confidence: 99%

KRATTA, a versatile triple telescope array for charged reaction products

Łukasik

Pawłowski

Budzanowski

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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A new detection system KRATTA, Krak\'ow Triple Telescope Array, is presented. This versatile, low threshold, broad energy range system has been built to measure the energy, emission angle, and isotopic composition of light charged reaction products. It consists of 38 independent modules which can be arranged in an arbitrary configuration. A single module, covering actively about 4.5 msr of the solid angle at the optimal distance of 40 cm from the target, consists of three identical, 0.500 mm thick, large area photodiodes, used also for direct detection, and of two CsI(1500 ppm Tl) crystals of 2.5 and 12.5 cm length, respectively. All the signals are digitally processed. The lower identification threshold, due to the thickness of the first photodiode, has been reduced to about 2.5 MeV for protons (~0.065 mm of Si equivalent) by applying a pulse shape analysis. The pulse shape analysis allowed also to decompose the complex signals from the middle photodiode into their ionization and scintillation components and to obtain a satisfactory isotopic resolution with a single readout channel. The upper energy limit for protons is about 260 MeV. The whole setup is easily portable. It performed very well during the ASY-EOS experiment, conducted in May 2011 at GSI. The structure and performance of the array are described using the results of Au+Au collisions at 400 MeV/nucleon obtained in this experiment.Comment: 10 pages, 18 figures, accepted by Nucl. Instr. and Meth.

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FASA - A 4π detector setup for the investigation of target multifragmentation in nucleus-nucleus collisions

Cited by 24 publications

References 4 publications

Freeze-out configuration in multifragmentation

Freeze-out configuration in multifragmentation

Time scale of nuclear multifragmentation induced by light relativistic ions

KRATTA, a versatile triple telescope array for charged reaction products

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