IMF-IMF correlations

Schapiro, O.; DeAngelis, A.R.; Gross, D. H. E.

doi:10.1016/0375-9474(94)90206-2

Cited by 30 publications

(16 citation statements)

References 19 publications

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“…lb, c, d and e we show the calculated total fragment charge Zto t and the charge distributions of the heaviest, medium and lightest fragment (labelled as Zx, Z2, Z3 respectively) as a function of the freeze-out radius, for the excitation energy values of 700 and 800 MeV. As it is clear from these plots, the freeze-out radius does not influence strongly the charge partition and the agreement between predicted and experimental charge distribution is As claimed in [8,19] and clearly seen in Fig. 1, increasing the excitation energy or the freeze-out radius the symmetry on the charge of the IMFs formed in the decay of the source increases.…”

Section: Exclusive Experimental Observables and Comparison With The Msupporting

confidence: 61%

“…In order to understand if also for our reaction, as for those analyzed in [5,8], an instantaneous multifragment emission can be responsible for the observed features, in this paper we have compared IMF-IMF correlation functions to the predictions of the Berlin Multifragmentation Model (BMM) [9], which is based on a statistical and instantaneous disassembly of an expanded and excited system. It has to be noted that the simultaneous disassembly of an excited source in 3 or more fragments, like in BMM, is compatible, as far as the relative velocities are concerned 1-10], with a sequential binary decay with a lifetime smaller than the Coulomb interaction time (-c ~ 10 -2z sec).…”

Section: Introductionmentioning

confidence: 98%

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Time scale and freeze-out volume in the Xe + Cu reaction at 45 MeV/u

D’Agostino

Bruno

Gramegna

et al. 1995

Z. Physik A - Hadrons and Nuclei

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Abstract.Correlations between Intermediate Mass Fragments were measured for the reaction Xe + Cu at E/A = 45 MeV/u. The velocity correlation function for central 3-fold events, depleted at small values of the relative coordinate, as typical for fast decay processes, reflects the mutual Coulomb repulsion between the emitted fragments. From the comparisons between a significant number of experimental observables and the predictions of the Berlin Multifragmentation Model, it appears that the data are compatible with a simultaneous multifragment emission.

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Section: Exclusive Experimental Observables and Comparison With The Msupporting

confidence: 61%

Section: Introductionmentioning

confidence: 98%

Time scale and freeze-out volume in the Xe + Cu reaction at 45 MeV/u

D’Agostino

Bruno

Gramegna

et al. 1995

Z. Physik A - Hadrons and Nuclei

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“…The formalism for two particle correlation depending on one variable was considered for intermediate mass fragments (IMF) emitted in multifragmentation [41,42,28]. We define the two fragment correlation function dependent on v red as:…”

Section: Velocity Correlationsmentioning

confidence: 99%

Multifragmentation of very heavy nuclear systems (III): Fragment velocity correlations and event topology at freeze-out

et al. 2006

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Kinetic energy spectra and fragment velocity correlations, simulated by means of stochastic mean-field calculations, are successfully confronted with experimental data for single multifragmenting sources prepared at the same excitation energy per nucleon in 32 AMeV 129 Xe+ nat Sn and 36 AMeV 155 Gd+ nat U central collisions. Relying thus on simulations, average freeze-out times of 200-240 fm/c are estimated The corresponding spatial distributions of fragments are more compact for the lighter system (∼3-4V 0 vs ∼8V 0 ).

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“…For Intermediate Mass Fragments (IMF) relative momentum correlations, large relative momenta are expected due to the strong influence of the long range Coulomb repulsion in the final decay channel. However, also for IMFs correlation functions, information about the reaction mechanism and time scale could be extracted [4,5,6,7,8,9,10]. The coexistence of dynamical and statistical mechanism in the reaction is an important aspect of the Fermi energy domain where competition between mean field and nucleon-nucleon have to be taken into account in the simulations.…”

Section: Introductionmentioning

confidence: 99%

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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IMF-IMF correlations

Cited by 30 publications

References 19 publications

Time scale and freeze-out volume in the Xe + Cu reaction at 45 MeV/u

Time scale and freeze-out volume in the Xe + Cu reaction at 45 MeV/u

Multifragmentation of very heavy nuclear systems (III): Fragment velocity correlations and event topology at freeze-out

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

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