Color dynamics in phase space: The Balescu–Lenard–Vlasov approach

Bonasera, A.

doi:10.1016/s0375-9474(00)00482-6

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…When considering the interaction of nucleons at short enough distances, the point particle assumption is not proper and the size of the nucleon should be taken into account. In CoMD [8,9,10,11,12,13,14], the nucleons are assumed to have a Gaussian distribution with width σ r…”

Section: Folding For Comdmentioning

confidence: 99%

“…In this first paper we only discuss the perturbative effect on the energy. We will introduce the correction into the microscopic model Constrained Molecular Dynamics (CoMD) [8,9,10,11,12,13,14], and in following research we will discuss actual production. The structure of this paper is as follows.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3: The relative change to binding energy when the vacuum polarization term is included.Z is chosen to minimize the binding energy according to Equation(10). The correction decreases the binding energy.…”

mentioning

confidence: 99%

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Coulomb field correction due to virtual $e^+e^-$ production in heavy ion collisions

Settlemyre,

Bonasera,

Zheng

2021

Preprint

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The correction to the Coulomb energy due to virtual production of e + e − pairs, which is on the order of one percent of the Coulomb energy at nuclear scales is discussed. The effects of including a pair-production term in the semi-empirical mass formula and the correction to the Coulomb barrier for a handful of nuclear collisions using the Bass and Coulomb potentials are studied. With an eye toward future work using Constrained Molecular Dynamics (CoMD) model, we also calculate the correction to the Coulomb energy and force between protons after folding with a Gaussian spatial distribution.

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Section: Folding For Comdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coulomb field correction due to virtual $e^+e^-$ production in heavy ion collisions

Settlemyre,

Bonasera,

Zheng

2021

Preprint

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“…At the temperatures and densities considered here quantum effects are not important. The approach has been previously applied to study the dynamics of the quark-gluon plasma 9) and in heavy ion collisions. 10) §2.…”

mentioning

confidence: 99%

“…We solve numerically the set of equations (2.1-2.3), i.e. we generate many CMD events to simulate the plasma, average over the CMD events to obtain the fluctuating and average quantities 9) in order to estimate the collision term. From the collision term we can perturbatively estimate the rate of ion-ion fusion events when those events are rare, i.e.…”

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confidence: 99%

Dynamics of Fusion in Plasmas

Bonasera

2004

Prog. Theor. Phys. Suppl.

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We investigate the possibility of gaining energy from nuclear fusion reactions using different mixtures of D, T and 6 Li. First, a plasma in equilibrium is studied at different densities and temperatures. In a second, highly non equilibrium case, the plasma is at high densities and excitation energies. While the first case could lead to an energy gain especially when coupled to an accelerator, in the second case the energy given to the system might be larger than the output energy even for a D+T plasma. This is due to the small number of particles which can be treated numerically. Furthermore, there is a possible double counting between the elementary fusion cross section and the exact Coulomb potential used in the calculations. §1. Introduction A way of producing energy is by means of nuclear fusion reactions. Such reactions naturally occur in stars and essentially consist of fusion of light elements such as Deuterium (D), Tritium (T), 3He and so on. 1) Reactions involving D+T have a large efficiency and are mostly studied and proposed as a way to produce energy. 2) However, there are some shortcomings for such a proposal. While D can be found easily in water, T is radioactive, very dangerous to handle and must be produced via n+Li reactions. Furthermore in D+T reactions, 14 MeV neutrons are produced which are of damage to the reactors and generate large quantities of radioisotopes. Even though, using low activation materials, the neutrons damage could be reduced, it would be better to avoid T as a main fuel ingredient. Alternatives have been proposed 3) such as D + 3 He 4) or p+ 11 B in Colliding Beam Fusion Reactors-CBFR. 5) There are essentially two routes studied nowdays to produce energy. In the first one a plasma is confined through strong magnetic fields at a given temperature θ and density ρ. This is like a boiling pot where from time to time some nuclear fusion occurs and energy is produced. In order to get more energy output than input, the θ and/or ρ must be very high. In such conditions, the plasma becomes highly chaotic and even turbulences set in. The confining fields are not strong enough to hold the plasma for a very long time.A completely different route to fusion is through the use of lasers. 6) One or more powerful lasers are used to compress and ignite a pellet of fuel. 7) Problems as confinement are avoided, however the time of compression is short, thus it might be difficult to gain energy from such a method even using the D+T fuel.Because of the many uncertainties discussed above, theoretical simulations are highly desirable in order to shed some light on the matter. Simulations exist based on hydrodynamics or kinetic approaches. 1), 6) Such approaches deal very often with the atomic or macroscopic (from the nuclear point of view) dynamics of the plasma. typeset using PTPT E X.cls Ver.0.89

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Density and temperature of bosons from quantum fluctuations

Zheng¹,

Giuliani²,

Bonasera³

2012

Nuclear Physics A

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A method to determine the density and temperature of a system is proposed based on quantum fluctuations typical of Bosons in the limit where the reached temperature T is close to the critical temperature Tc for a Bose condensate at a given density ρ. Quadrupole and particle multiplicity fluctuations relations are derived in terms of T Tc . This method is valid for weakly interacting infinite and finite Boson systems. As an example, we apply it to heavy ion collisions using the Constrained Molecular Dynamics (CoMD) approach which includes the Fermi statistics. The model shows some clusterization into deuteron and α clusters which could suggest a Bose condensate. However, our approach demonstrates that in the model there is no Bose condensate but it gives useful informations to be tested experimentally. We stress the differences with methods based on classical approximations. The derived 'quantum' temperatures are systematically higher than the corresponding 'classical' ones. The role of the Coulomb charge of fragments is discussed.

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Color dynamics in phase space: The Balescu–Lenard–Vlasov approach

Cited by 10 publications

References 11 publications

Coulomb field correction due to virtual $e^+e^-$ production in heavy ion collisions

Coulomb field correction due to virtual $e^+e^-$ production in heavy ion collisions

Dynamics of Fusion in Plasmas

Density and temperature of bosons from quantum fluctuations

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