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Background: Fission modes in superheavy nuclei are expected to be impacted by quantum shell effects. Similar shell effects may be present in quasifission reactions, acting to hinder the mass equilibration process in heavy-ion collisions.…

核理论 · 物理学 2023-06-07 Patrick McGlynn , Cedric Simenel

The fusion process and the competition between fission and n, p and alpha-particle emission is studied. The calculations are performed for nuclei at excitation energies from 80 MeV up to about 300 MeV. The nuclear fission is described by a…

核理论 · 物理学 2007-05-23 K. Pomorski , K. Dietrich , W. Przystupa , J. Bartel , J. Richert

Theoretical studies of photochemical processes require a description of the energy surfaces of excited electronic states, especially near degeneracies, where transitions between states are most likely. Systems relevant to photochemical…

State-of-the-art simulations of high-energy nuclear collisions rely on hybrid setups, involving in particular a pre-equilibrium stage to let the system evolve from a far-from-equilibrium initial condition towards a near-equilibrated state…

核理论 · 物理学 2024-10-31 Nicolas Borghini , Renata Krupczak , Hendrik Roch

In simulations of high energy heavy ion collisions that employ viscous hydrodynamics, single particle distributions are distorted from their thermal equilibrium form due to gradients in the flow velocity. These are closely related to the…

核理论 · 物理学 2017-01-31 P. Chakraborty , J. I. Kapusta

We present a microscopic calculation of multi-nucleon transfer reactions employing the time-dependent Hartree-Fock (TDHF) theory. In our previous publication [Phys. Rev. C 88, 014614 (2013)], we reported our analysis for the multi-nucleon…

核理论 · 物理学 2016-11-10 Kazuyuki Sekizawa , Kazuhiro Yabana

Computation of collisional energy loss in a finite size QCD medium has become crucial to obtain reliable predictions for jet quenching in ultra-relativistic heavy ion collisions. We here compute this energy loss up to the zeroth order in…

核理论 · 物理学 2008-11-26 Magdalena Djordjevic

Fission fragments' charge and mass distribution is an important input to applications ranging from basic science to energy production or nuclear non-proliferation. In simulations of nucleosynthesis or calculations of superheavy elements,…

核理论 · 物理学 2021-05-12 Marc Verriere , David Regnier , Nicolas Schunck

Total cross sections for proton- and deuteron-induced-fission of 208Pb and 238U have been determined in the energy range between 500 MeV and 1 GeV. The experiment has been performed in inverse kinematics at GSI Darmstadt, facilitating the…

This work presents a microscopic study of dissipation in fission dynamical evolutions with the time-dependent Hartree-Fock+BCS method in terms of energy dependence and pairing dependence. The friction coefficients and dissipation energies…

核理论 · 物理学 2021-11-24 Yu Qiang , Junchen Pei

We report the first predictions of elliptic flow ($v_2$) of identified hadrons at mid-rapidity ($|y| <$ 1.0) in Au+Au collisions at $E_{lab} =$ 6.7, 8, 11, and 25 A GeV using the Parton Hadron String Dynamics (PHSD) model. The transverse…

高能物理 - 唯象学 · 物理学 2024-07-09 B. Towseef , M. Farooq , V. Bairathi , B. Waseem , S. Kabana , S. Ahmad

There have been discussions in the recent literature regarding the accuracy of the available electron impact excitation rates (equivalently effective collision strengths $\Upsilon$) for transitions in Be-like ions. In the present paper we…

原子物理 · 物理学 2016-09-07 K. M. Aggarwal , F. P. Keenan , K. D. Lawson

Hydrodynamic fluctuations have been studied in a wide variety of physical, chemical, and biological phenomena in the past decade. In high energy heavy ion collisions, there will be intrinsic fluctuations even if the initial conditions are…

核理论 · 物理学 2013-06-18 Joseph I. Kapusta , Juan M. Torres-Rincon

This paper investigates the impacts of the different surface energy coefficients on the compound nucleus decay modes during heavy ion fusion reactions, with focus given to the superheavy nuclei (SHN) in the range of $Z=112-118$. The…

核理论 · 物理学 2024-01-01 R. Zargini , S. A. Seyyedi

We make predictions for momentum-integrated elliptic and triangular flow as well as mean transverse momentum for 5.02 TeV Pb-Pb collisions, as planned at the Large Hadron Collider. We use hydrodynamic calculations to predict the change of…

核理论 · 物理学 2016-03-30 Jacquelyn Noronha-Hostler , Matthew Luzum , Jean-Yves Ollitrault

The entrance-channel mass-asymmetry dependence of the compound nucleus formation time in light heavy-ion reactions has been investigated within the framework of semiclassical dissipative collision models. the model calculations have been…

核理论 · 物理学 2009-09-25 A. Szanto de Toledo , B. V. Carlson , C. Beck , M. Thoenessen

Here I review measurements of v2, the second component in a Fourier decomposition of the azimuthal dependence of particle production relative to the reaction plane in heavy-ion collisions. v2 is an observable central to the interpretation…

核实验 · 物理学 2016-12-21 Paul Sorensen

$^{50}$Ti-induced fusion reactions to synthesize superheavy elements are studied systematically with the two-step model developed recently, where fusion process is divided into approaching phase and formation phase. Furthermore, the residue…

核理论 · 物理学 2016-03-23 Ling Liu , Caiwan Shen , Qingfeng Li , Ya Tu , Xiaobao Wang , Yongjia Wang

We review recent developments in the QCD description of jet production and modification in reactions with heavy nuclei at relativistic energies. Our goal is to formulate a perturbative expansion in the presence of nuclear matter that allows…

高能物理 - 唯象学 · 物理学 2011-05-27 I. Vitev

The role of the entrance channel in the fusion-fission reactions leading to nearly the same superheavy compound nucleus is studied in the framework of dynamic model. The calculations are done for $^{48}$Ca + $^{244}$Pu and $^{74,76}$Ge +…

核理论 · 物理学 2007-05-23 R. V. Jolos , A. I. Muminov , A. K. Nasirov