Nuclear orientation of<sup>191</sup>Pt in Fe

Lattimer, W. M.; Krane, K. S.; Stone, N. J.; Eska, G.

doi:10.1088/0305-4616/7/12/021

Cited by 42 publications

(38 citation statements)

References 27 publications

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“…There is clearly an important density dependence (the temperature dependence turns out to be much less pronounced) and the average remains even below 1.5, in particular at high density. For comparison we also display results of some frequently used RMF models, namely the LS220 EOS [30], the Shen EOS [31], and the recent SFHo [36]. We plan to study this problem more extensively in future detailed merger simulations.…”

Section: Adiabatic Indexmentioning

confidence: 99%

“…A few finite-temperature nuclear EOSs for astrophysical simulations are now available [16,17,[30][31][32][33][34][35][36], and the predictions for the effects of temperature on stellar stability are conflicting: Relativistic-mean-field (RMF) models usually predict increasing stability (maximum mass) with temperature [14,37,38], whereas BHF results [16,17] indicate in general a slight reduction of the maximum mass. We will try to analyze in some detail this feature.…”

Section: Introductionmentioning

confidence: 99%

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Hot neutron stars with microscopic equations of state

Burgio

et al. 2019

Phys. Rev. C

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We study the properties of hot beta-stable nuclear matter using equations of state derived within the Brueckner-Hartree-Fock approach at finite temperature including consistent three-body forces. Simple and accurate parametrizations of the finite-temperature equations of state are provided. The properties of hot neutron stars are then investigated within this framework, in particular the temperature dependence of the maximum mass. We find very small temperature effects and analyze the interplay of the different contributions.

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Section: Adiabatic Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot neutron stars with microscopic equations of state

Burgio

et al. 2019

Phys. Rev. C

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“…This is because the nature of phase transitions in a matter is strongly influenced by its dimensionality. The inclusion of the isospin degree of freedom in studying the phase transitions in nuclear matter has thus attracted much attention recently [16,56,77,78,107,108,109,110]. These studies have shown that there are indeed new features associated with the liquid-gas phase transition in asymmetric nuclear matter.…”

Section: New Features Of Liquid-gas Phase Transition In Asymmetric Numentioning

confidence: 99%

Isospin Physics in Heavy-Ion Collisions at Intermediate Energies

Bauer

1998

Int. J. Mod. Phys. E

433

465

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In nuclear collisions induced by stable or radioactive neutron-rich nuclei a transient state of nuclear matter with an appreciable isospin asymmetry as well as thermal and compressional excitation can be created. This offers the possibility to study the properties of nuclear matter in the region between symmetric nuclear matter and pure neutron matter. In this review, we discuss recent theoretical studies of the equation of state of isospin-asymmetric nuclear matter and its relations to the properties of neutron stars and radioactive nuclei. Chemical and mechanical instabilities as well as the liquid-gas phase transition in asymmetric nuclear matter are investigated. The in-medium nucleon-nucleon cross sections at different isospin states are reviewed as they affect significantly the dynamics of heavy ion collisions induced by radioactive beams. We then discuss an isospin-dependent transport model, which includes different mean-field potentials and cross sections for the proton and neutron, and its application to these reactions. Furthermore, we review the comparisons between theoretical predictions and available experimental data. In particular, we discuss the study of nuclear stopping in terms of isospin equilibration, the dependence of nuclear collective flow and balance energy on the isospin-dependent nuclear equation of state and cross sections, the isospin dependence of total nuclear reaction cross sections, and the role of isospin in preequilibrium nucleon emissions and subthreshold pion production.

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“…Toroids have been seen in collisions between water drops [5]. Bubbles were observed in one-dimensional hydrodynamical collisions [6,7] as well as in hot dense matter [8,9] and Thomas-Fermi and Hartree-Fock calculations [10]. Recently, theoretical research in this area was revived when it was suggested that the formation of toroids and bubbles could provide new decay modes for multifragment disintegration [11 -15].…”

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confidence: 99%

Formation and decay of toroidal and bubble nuclei and the nuclear equation of state

Natowitz

Gagliardi

et al. 1993

Phys. Rev. C

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Multifragmentation, following the formation of toroidal and bubble nuclei, is observed with an improved Boltzmann-Uehling-Uhlenbeck model for central Mo+ Mo collisions. With a stiff equation of state, simultaneous explosion into several nearly equal fragments in a ringlike manner occurs due to the formation of metastable toroidal nuclei. In contrast, with a soft equation of state, simultaneous explosion into several nearly equal fragments in a volumelike manner occurs due to the formation of metastable bubble nuclei. Experimental signatures for the formation of these exotic shapes are discussed. PACS number(s): 25.70.Pq, 21.65.+f, 24.10.Cn, 25.70.Gh Two decades ago, in connection with the stability of nuclei with new types of topology proposed by Wheeler [1] and Siemens and Bethe [2], Wong systematically studied the instabilities of toroidal and spherical bubble nuclei within the context of liquid drop, shell, and Hartree-Fock models [3]. He subsequently argued that higher nuclear temperatures enhance the possibility for the formation of toroidal and bubble nuclei [4]. Toroids have been seen in collisions between water drops [5]. Bubbles were observed in one-dimensional hydrodynamical collisions [6,7] as well as in hot dense matter [8,9] and Thomas-Fermi and Hartree-Fock calculations [10]. Recently, theoretical research in this area was revived when it was suggested that the formation of toroids and bubbles could provide new decay modes for multifragment disintegration [11 -15]. To investigate the dependence on the equation of state (EOS) and to look for experimental observables, we I have performed improved Boltzmann-Uehling-Uhlenbeck (BUU) calculations [15 -17] for Mo+ Mo collisions. In our calculations, we have included Coulomb interactions and have used a lattice Hamiltonian method [18] to propagate test particles.In the present calculations for the 2Mo+ Mo system, we find that, depending on the nuclear equation of state, a metastable toroidal or bubble nucleus can be formed. The decays of these unstable states are simultaneous, yet very slow. We predict a significant increase in the cross sections of nearly equal fragments with small center-of-mass energies as a result of the cold breakup of a bubble or toroidal nucleus. These two shapes can further be separated by the coplanarity of the nearly equal fragments with similar energies, which, in turn, could provide information about the nuclear equation of state. We simulate the Boltzmann-Uehling-Uhlenbeck equation [19] 0fg 4 s do"" Bt (2vr) s dA 4-v V'" fg -V"U Tp fi -d k2dA "vq2[fs f4(1fq) (1 -f2)fq f2(1fs) (1 -f4)], with the lattice Hamiltonian method of Lenk and Pandharipande [18]. In Eq. (1), "&&" and vq2 are the inmedium cross section and relative velocity for the colliding nucleons, and U is the total mean-field potential consisting of the Coulomb potential and a nuclear potential with isoscalar and symmetry terms [16]. In our calculations, we use two parameter sets [19] for the EOS which correspond to values of nuclear compressibility at K = 200 MeV (so...

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Nuclear orientation of¹⁹¹Pt in Fe

Cited by 42 publications

References 27 publications

Hot neutron stars with microscopic equations of state

Hot neutron stars with microscopic equations of state

Isospin Physics in Heavy-Ion Collisions at Intermediate Energies

Formation and decay of toroidal and bubble nuclei and the nuclear equation of state

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Nuclear orientation of191Pt in Fe

Cited by 42 publications

References 27 publications

Hot neutron stars with microscopic equations of state

Hot neutron stars with microscopic equations of state

Isospin Physics in Heavy-Ion Collisions at Intermediate Energies

Formation and decay of toroidal and bubble nuclei and the nuclear equation of state

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Nuclear orientation of¹⁹¹Pt in Fe