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Experimental studies of fission induced in relativistic nuclear collisions show a systematic enhancement of the excitation energy of the primary fragments by a factor of ~ 2, before their decay by fission and other secondary fragments.…

核理论 · 物理学 2020-04-08 C. A. Bertulani , Y. Kucuk , R. Lozeva

Several different schemes for plasma wakefield acceleration using a train of drivers have been pursued, based on the resonant excitation of a plasma wave. Since these schemes rely on the plasma electron wave surviving for many periods, the…

等离子体物理 · 物理学 2025-12-17 Erwin Walter , John P. Farmer , Marlene Turner , Frank Jenko

The transverse momentum dependent nuclear modification factors (NMF), namely $R_{CP}$, is investigated for protons produced in Au + Au at 1$A$ GeV within the framework of the isospin-dependent quantum molecular dynamics (IQMD) model. It is…

核理论 · 物理学 2014-05-07 M. Lv , Y. G. Ma , G. Q. Zhang , J. H. Chen , D. Q. Fang

In plasma-based acceleration, an ultra-relativistic particle bunch$\unicode{x2014}$or an intense laser beam$\unicode{x2014}$is used to expel electrons from its propagation path, forming a wake that is devoid of electrons. The ions, being…

We consider the solid or hexatic non-equilibrium phases of an interacting two-dimensional system of Active Brownian Particles at high density and investigate numerically and theoretically the properties of the velocity distribution function…

统计力学 · 物理学 2020-09-16 Lorenzo Caprini , Umberto Marini Bettolo Marconi

Transverse momentum spectra of negative and positive pions produced at mid-(pseudo)rapidity in inelastic or non-single-diffractive proton-proton collisions over a center-of-mass energy, $\sqrt{s}$, range from a few GeV to above 10 TeV are…

高能物理 - 唯象学 · 物理学 2020-06-16 Li-Li Li , Fu-Hu Liu

The paper reports a new electrostatic-confinement based fusion approach, where, a new non-equilibrium distribution function for an ion-beam, compressed by an external electric force, has been derived. This distribution function allows the…

等离子体物理 · 物理学 2013-07-02 R. K. Paul

Global macroscopic features observed in the fully-damped binary processes in light di-nuclear systems, such as limiting angular momenta, mean total kinetic energies and energy thresholds for fusion-fission processes (''fission thresholds")…

核理论 · 物理学 2009-09-25 C. Beck , A. Szanto de Toledo

Plasmas in which there is a threshold for a dominant reaction to take place (such as recombination or attachment) will have particle distributions that evolve as the reaction progresses. The form of the Boltzmann collision term in such a…

等离子体物理 · 物理学 2008-10-13 D A Diver , L F A Teodoro , C S MacLachlan , H E Potts

The proton boron fusion reaction, 11B(p, 3{\alpha}), is investigated using MCNP6 to assess the viability for potential use in radiation therapy. The 11B(p, 3{\alpha}) is theoretically desirable because it could combine the localized dose…

医学物理 · 物理学 2022-09-30 David P. Adam , Bryan P. Bednarz

From the expression for the electromagnetic field in the neighborhood of a point charge we determine the rate of electromagnetic momentum flow, calculated using the Maxwell stress tensor, across a surface surrounding the charge. From that…

经典物理 · 物理学 2017-04-20 Ashok K. Singal

The neutron yields observed in inertial confinement fusion experiments for higher convergence ratios are about two orders of magnitude smaller than the neutron yields predicted by one-dimensional models, the discrepancy being attributed to…

核实验 · 物理学 2007-05-23 Silviu Olariu

A method is presented for inferring the deuterium fuel ion temperature from neutron counts measured with fast liquid scintillators in conditions where the ion velocity distribution is Maxwellian. Local neutron count rates at each…

The kinetics of bimolecular reactions in solution depends, among other factors, on intermolecular forces such as steric repulsion or electrostatic interaction. Microscopically, a pair of molecules first has to meet by diffusion before the…

软凝聚态物质 · 物理学 2019-10-24 Manuel Dibak , Christoph Fröhner , Frank Noé , Felix Höfling

We consider a two-dimensional model system of Brownian particles in which slow particles are accelerated while fast particles are damped. The motion of the individual particles are described by a Langevin equation with Rayleigh-Helmholtz…

软凝聚态物质 · 物理学 2016-09-12 Anoosheh Yazdi , Matthias Sperl

It is shown in the framework of the fully relativistic Dirac-Fock treatment of photoionization and radiative recombination processes that taking into account all significant multipoles of the radiative field is of considerable importance at…

等离子体物理 · 物理学 2008-03-14 M. B. Trzhaskovskaya , V. K. Nikulin , R. E. H. Clark

We generalize the Beliaev diagrammatic theory of an interacting spinless Bose-Einstein condensate to the case of a binary mixture. We derive a set of coupled Dyson equations and find analytically the Green's functions of the system. The…

量子气体 · 物理学 2018-05-30 O. I. Utesov , M. I. Baglay , S. V. Andreev

Using the kinetic-theory-based two-fluid models as a starting point, we develop filtered two-fluid models for a gas-particle flow in the presence of an isothermal, first-order, solid-catalyzed reaction of a gaseous species. As a consequence…

其他凝聚态物理 · 物理学 2012-04-30 William Holloway , Sankaran Sundaresan

We analyze thermonuclear and pycnonuclear fusion reactions in dense matter containing atomic nuclei of different types. We extend a phenomenological expression for the reaction rate, proposed recently by Gasques et al. (2005) for the…

天体物理学 · 物理学 2009-11-11 D. G. Yakovlev , L. R. Gasques , M. Beard , M. Wiescher , A. V. Afanasjev

In this paper we perform a formal asymptotic analysis on a kinetic model for reactive mixtures in order to derive a reaction-diffusion system of Maxwell-Stefan type. More specifically, we start from the kinetic model of simple reacting…

流体动力学 · 物理学 2019-11-20 Benjamin Anwasia , Patrícia Gonçalves , Ana Jacinta Soares