Isoscaling of heavy projectile residues and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>N</mml:mi><mml:mo>/</mml:mo><mml:mi>Z</mml:mi></mml:mrow></mml:math>equilibration in peripheral heavy-ion collisions below the Fermi energy

Souliotis, G. A.; Fountas, P. N.; Veselský, M.; Galanopoulos, S.; Kohley, Z.; McIntosh, A. B.; Yennello, S. J.; Bonasera, A.

doi:10.1103/physrevc.90.064612

Cited by 22 publications

(16 citation statements)

References 102 publications

(170 reference statements)

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“…The dissipation is related to the interaction time and can be estimated through a model. A recent measurement of a broad range of isotopes and energy dissipation is consistent with this timescale [24]. Similarly, the separation angle is proportional to the interaction time and can be calibrated via angular momentum.…”

mentioning

confidence: 65%

Characterizing Neutron-Proton Equilibration in Nuclear Reactions with Subzeptosecond Resolution

Jedele¹,

McIntosh²,

Hagel³

et al. 2017

Phys. Rev. Lett.

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mentioning

confidence: 65%

Characterizing Neutron-Proton Equilibration in Nuclear Reactions with Subzeptosecond Resolution

Jedele¹,

McIntosh²,

Hagel³

et al. 2017

Phys. Rev. Lett.

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“…In this case, we assumed that the beam intensity is equal to the production rate of 46 Ar from the reaction 48 Ca (15 MeV/nucleon) + 238 U (table 1) and that the target thickness is again 20 mg/cm 2 . We see that very exotic nuclei such as 52 Ar and 49 Cl can be produced with rates that may allow spectroscopic studies. Finally, in table 3, we show the predicted cross sections and production rates of nuclides from the reaction of a radioactive beam of 54 Ca (15 MeV/nucleon) with 238 U.…”

Section: Reactions With the 40 Ar Projectile At 15 Mev/nucleonmentioning

confidence: 94%

Neutron-rich rare isotope production with stable and radioactive beams in the mass range A ∼ 40–60 at beam energy around 15 MeV/nucleon

Papageorgiou¹,

Souliotis²,

Tshoo³

et al. 2018

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

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We studied the production of neutron-rich nuclides in multinucleon transfer collisions of stable and radioactive beams in the mass range A∼40-60. We first presented our experimental cross section data of projectile fragments from the reaction of 40 Ar(15 MeV/nucleon) with 64 Ni, 58 Ni and 27 Al. We then compared them with calculations based on either the deep-inelastic transfer (DIT) model or the constrained molecular dynamics (CoMD) model, followed by the statistical multifragmentation model (SMM). An overall good agreement of the calculations with the experimental data is obtained. We continued with calculations of the reaction of 40 Ar (15 MeV/nucleon) with 238 U target and then with reactions of 48 Ca (15 MeV/nucleon) with 64 Ni and 238 U targets. In these reactions, neutron-rich rare isotopes with large cross sections are produced. These nuclides, in turn, can be assumed to form radioactive beams and interact with a subsequent target (preferably 238 U), leading to the production of extremely neutron-rich and even new isotopes (e.g. 60 Ca) in this mass range. We conclude that multinucleon transfer reactions with stable or radioactive beams at the energy of around 15 MeV/nucleon offer an effective route to access extremely neutron-rich rare isotopes for nuclear structure or reaction studies.

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“…We continue our investigations with the application of CoMD to high energy fission reactions with protons. We remind that the CoMD code has been successfully applied to the description of a large variety of nuclear reactions (e.g., [85,[99][100][101][102]). As a fully dynamical code, we expect that it may perform well also with spallationtype reactions with high-energy protons.…”

Section: B Mass Yields: High Energymentioning

confidence: 99%

Microscopic dynamical description of proton-induced fission with the constrained molecular dynamics model

et al. 2015

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The microscopic description of nuclear fission still remains a topic of intense basic research. Understanding nuclear fission, apart from a theoretical point of view, is of practical importance for energy production and the transmutation of nuclear waste. In nuclear astrophysics, fission sets the upper limit to the nucleosynthesis of heavy elements via the r-process. In this work we initiated a systematic study of intermediate energy proton-induced fission using the Constrained Molecular Dynamics (CoMD) code. The CoMD code implements an effective interaction with a nuclear matter compressibility of K=200 (soft EOS) with several forms of the density dependence of the nucleon-nucleon symmetry potential. Moreover, a constraint is imposed in the phase-space occupation for each nucleon restoring the Pauli principle at each time step of the collision. A proper choice of the surface parameter of the effective interaction has been made to describe fission. In this work, we present results of fission calculations for proton-induced reactions on : a) 232 Th at 27 and 63 MeV, b) 235 U at 10, 30, 60 and 100 MeV, and c) 238 U at 100 and 660 MeV. The calculated observables include fission-fragment mass distributions, total fission energies, neutron multiplicities and fission times. These observables are compared to available experimental data. We show that the microscopic CoMD code is able to describe the complicated many-body dynamics of the fission process at intermediate and high energy and give a reasonable estimate of the fission time scale. Sensitivity of the results to the density dependence of the nucleon symmetry potential (and, thus, the nuclear symmetry energy) is found. Further improvements of the code are necessary to achieve a satisfactory description of low energy fission in which shell effects play a dominant role.Understanding the mechanism of nuclear fission, that is the transformation of a single heavy nucleus into two receeding fragments, has been a long journey of fruitful research and debate and, still today, is far from being complete. Upon its discovery, fission was interpreted by Meitner and Frisch [22] as the division of a charged liquid drop due to the interplay of the repulsive Coulomb force between the protons and the surface tension due to the attractive nucleon-nucleon interaction. In the seminal paper of Bohr and Wheeler [23], fission was described with a liquid-drop model and the first estimates of fission probalilities were obtained based on statistical arguments. The first detailed calculations of potential energies of deformed nuclear drops were performed by Frankel and Metropolis in 1947 [24] employing the ENIAC, one of the first digital computers. Despite the success in the interpretation of fission based on the liquid-drop model, the prevailing asymmetry in the mass distribution of the minor actinides could not be deciphered until shell corrections to the macroscopic liquid drop were taken into account (see below). A detailed statistical model that could describe asymmetric fission was...

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Isoscaling of heavy projectile residues andN/Zequilibration in peripheral heavy-ion collisions below the Fermi energy

Cited by 22 publications

References 102 publications

Characterizing Neutron-Proton Equilibration in Nuclear Reactions with Subzeptosecond Resolution

Characterizing Neutron-Proton Equilibration in Nuclear Reactions with Subzeptosecond Resolution

Neutron-rich rare isotope production with stable and radioactive beams in the mass range A ∼ 40–60 at beam energy around 15 MeV/nucleon

Microscopic dynamical description of proton-induced fission with the constrained molecular dynamics model

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