Interplay of neutron–proton equilibration and nuclear dynamics

McIntosh, A. B.; Yennello, S. J.

doi:10.1016/j.ppnp.2019.06.001

Cited by 20 publications

(9 citation statements)

References 118 publications

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“…The subsequent breakup of the PLF* can develop into an HF and an LF in the exit channel. Angular momentum gained by the PLF* in mid-peripheral collisions can cause this breakup axis to have a nonzero angle (θ prox ) relative to the PLF*-TLF* (excited target-like fragment) separation axis and can be calculated by The velocity vectors used in the calculation of θ prox (1) are the two-fragment center-of-mass velocity in the laboratory frame (2) and the relative velocity between the HF and LF (3). The time of interaction for N-Z equilibration to occur can be probed through θ prox [19].…”

Section: Resultsmentioning

confidence: 99%

“…While the value of the asymmetry energy is well constrained at saturation density, its evolution away from saturation density is largely unknown. Multifragmentation in heavy ion collisions has been investigated to probe regions of low density nuclear matter in the search for asymmetry energy constraints [1,2]. It is necessary to find observables that are sensitive to the asymmetry energy to allow constraints through experimental comparisons to theoretical models [3].…”

Section: Introductionmentioning

confidence: 99%

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Isoscaling and nuclear reaction dynamics

et al. 2020

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Isoscaling parameters α and β have been explored as a function of breakup angle in binary excited projectile-like fragment decays produced in collisions of 70 Zn + 70 Zn and 64 Zn + 64 Zn at 35 MeV per nucleon. In this analysis, focus was placed on isoscaling the second heaviest fragment with 4 ≤ ZL ≤ 8 emitted from the excited projectile-like fragment in events that contained a heavy fragment with ZH ≥ 12. The breakup orientation θprox was defined as the angle between the heavy and light fragments' center of mass velocity and the fragment pairs' relative velocity. Breakups between 0 • < θprox ≤ 80 • have been shown to be dominated by dynamical contributions, while break-up angles of θprox > 100 • are predominantly statistical. Historically, isoscaling has often been understood and applied in a statistical context, assuming that the fragments are produced after statistical equilibrium is achieved. Studying isoscaling parameters as a function of θprox reveals the sensitivity of α and β to the mechanism of fragment production.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isoscaling and nuclear reaction dynamics

et al. 2020

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“…Two detailed reviews of the main experimental results concerning the isospin transport process and the comparisons with the prediction of the most high-performance models can be found in Refs. [36] and [37].…”

Section: Introductionmentioning

confidence: 99%

Isospin transport phenomena for the systems Kr80+Ca40,48 at 35 MeV/nucleon

Piantelli¹,

Casini²,

Ono³

et al. 2021

Phys. Rev. C

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Experimental data concerning isospin transport phenomena for the systems 80 Kr + 40,48 Ca at 35 MeV/nucleon are presented. Data have been collected with four FAZIA blocks; this data set is the same analyzed in S. Piantelli et al., Phys. Rev. C 101, 034613 (2020). The isotopic composition of the QuasiProjectile residue (up to Z around 25) and of its decay products in the two reactions are compared, finding a neutron enrichment when the target is 48 Ca. The isotopic composition of the emitted light charged particles (LCP) and intermediate mass fragments (IMF) was also investigated in different windows of velocity. The obtained results have been compared with the prediction of the transport model AMD followed by the statistical code GEMINI (used as an afterburner), with different recipes for the density dependence of the symmetry energy term in the nuclear equation of state. A weak indication in favor of a stiff symmetry energy emerges when the fragments emitted at midvelocity are examined.

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“…The phenomena discussed here is directly related to the transport dynamics between reacting systems that initially carry a quantal asymmetry. A recent example of such a study is the experiment to investigate isospin equilibration in the vicinity of the Fermi energy [1,2]. Earlier studies at lower energies involved deep-inelastic reaction of systems with large isospin asymmetry [3][4][5].…”

Section: Introductionmentioning

confidence: 99%