Experimental effects of dynamics and thermodynamics in nuclear reactions on the symmetry energy as seen by the CHIMERA 4 $ \pi$ detector

Filippo, E. De; Pagano, A.

doi:10.1140/epja/i2014-14032-y

Cited by 61 publications

(59 citation statements)

References 148 publications

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“…The simulated events have been constrained as the experimental data and, remarkably, the range of the resulting simulated impact parameters, i.e., about 2 ≤ b ≤ 8 fm, was found to be consistent with the evaluated experimental one, as deduced by using the Cavata method [25]. In Fig.…”

Section: Transport Simulations and Comparisonssupporting

confidence: 64%

Signals for dynamical process from IMF-IMF correlation function

Pagano¹,

Acosta²,

Auditore³

et al. 2017

Proceedings of 55th International Winter Meeting on Nuclear Physics — PoS(BORMIO2017)

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In this paper we briefly discuss about a novel application of the IMF-IMF correlation function in the physics case of heavy projectile-like (PLF) binary fission-like massive splitting in heavy ion collisions at Fermi energy. In particular, results are shown for the reverse kinematics reaction 124 Sn+ 64 Ni at 35 AMeV that has been investigated by using the forward part of CHIMERA multi-detector. Transport CoMD simulations are compared with the data. The main analysis was performed as a function of the charge asymmetry of the decay channel. The coexistence of dynamical and statistical components as a function of the charge asymmetry of the binary breakup is clearly evidenced. We show that the IMF-IMF correlation functions, when coupled with transport calculations, can be used to pin down the timescale of the fragments production and consequently the relevant ingredients of the in medium effective interaction. Efforts are being planned to extend the method to different reaction mechanisms and nuclear systems and, also, to compare the data with different transport theory simulations.

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Section: Transport Simulations and Comparisonssupporting

confidence: 64%

Signals for dynamical process from IMF-IMF correlation function

Pagano¹,

Acosta²,

Auditore³

et al. 2017

Proceedings of 55th International Winter Meeting on Nuclear Physics — PoS(BORMIO2017)

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show abstract

“…In CoMDIII [16] simulations and comparisons with experimental data shown in Fig.5 ( a), b) and c) ) the sequential decay is not included in the simulations. The simulated events have been constrained as the experimental data and, remarkably, the range of the resulting simulated impact parameters, i.e., about 2 ≤ b ≤ 8 fm, was found to be consistent with the evaluated experimental one, as deduced by using the Cavata method [22]. occurring within 800 fm/c is dominated by an asymmetric splitting of intermediate or large charge asymmetries.…”

Section: Transport Simulations and Comparisonssupporting

confidence: 59%

Statistical against dynamical PLF fission as seen by the IMF-IMF correlation functions and comparisons with CoMD model

Pagano

Acosta

Auditore

et al. 2018

J. Phys.: Conf. Ser.

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Abstract. In nuclear reactions at Fermi energies two and multi particles intensity interferometry correlation methods are powerful tools in order to pin down the characteristic time scale of the emission processes. In this paper we summarize an improved application of the fragment-fragment correlation function in the specific physics case of heavy projectile-like (PLF) binary massive splitting in two fragments of intermediate mass (IMF). Results are shown for the reverse kinematics reaction 124 Sn+ 64 N i at 35 AMeV that has been investigated by using the forward part of CHIMERA multi-detector. The analysis was performed as a function of the charge asymmetry of the observed couples of IMF. We show a coexistence of dynamical and statistical components as a function of the charge asymmetry. Transport CoMD simulations are compared with the data in order to pin down the timescale of the fragments production and the relevant ingredients of the in medium effective interaction used in the transport calculations.

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“…Four double rings of the CHIMERA multidetector [18,19] had been transported to the GSI laboratory and installed at their nominal distances from the target, covering polar angles between 7…”

Section: Chimera Hodoscopementioning

confidence: 99%

Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density

Russotto¹,

Gannon²,

Kupny³

et al. 2016

Phys. Rev. C

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212

221

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Directed and elliptic flows of neutrons and light charged particles were measured for the reaction 197 Au+ 197 Au at 400 MeV/nucleon incident energy within the ASY-EOS experimental campaign at the GSI laboratory. The detection system consisted of the Large Area Neutron Detector LAND, combined with parts of the CHIMERA multidetector, of the ALADIN Time-of-flight Wall, and of the Washington-University Microball detector. The latter three arrays were used for the event characterization and reaction-plane reconstruction. In addition, an array of triple telescopes, KRATTA, 2 was used for complementary measurements of the isotopic composition and flows of light charged particles.From the comparison of the elliptic flow ratio of neutrons with respect to charged particles with UrQMD predictions, a value γ = 0.72 ± 0.19 is obtained for the power-law coefficient describing the density dependence of the potential part in the parametrization of the symmetry energy. It represents a new and more stringent constraint for the regime of supra-saturation density and confirms, with a considerably smaller uncertainty, the moderately soft to linear density dependence deduced from the earlier FOPI-LAND data. The densities probed are shown to reach beyond twice saturation.

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Experimental effects of dynamics and thermodynamics in nuclear reactions on the symmetry energy as seen by the CHIMERA 4 $ \pi$ detector

Cited by 61 publications

References 148 publications

Signals for dynamical process from IMF-IMF correlation function

Signals for dynamical process from IMF-IMF correlation function

Statistical against dynamical PLF fission as seen by the IMF-IMF correlation functions and comparisons with CoMD model

Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density

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