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We employ classical molecular dynamics simulations to investigate the molecular-level structure of water during the isothermal compression of hexagonal ice (I$h$) and low-density amorphous (LDA) ice at low temperatures. In both cases, the…

化学物理 · 物理学 2018-07-11 Fausto Martelli , Nicolas Giovambattista , Salvatore Torquato , Roberto Car

High energy heavy-ion collisions are proposed as a novel means to constrain stringently the high density (HD) behaviour of nuclear symmetry energy. Within an isospin-dependent hadronic transport model, it is shown for the first time that…

核理论 · 物理学 2011-05-05 Bao-An Li

The foundation of the local energy-density functional method to describe the nuclear ground-state properties is given. The method is used to investigate differential observables such as the odd-even mass differences and odd-even effects in…

核理论 · 物理学 2009-11-07 S. A. Fayans , S. V. Tolokonnikov , E. L. Trykov , D. Zawischa

We present a general multi-component density functional theory in which electrons and nuclei are treated completely quantum mechanically, without the use of a Born-Oppenheimer approximation. The two fundamental quantities in terms of which…

材料科学 · 物理学 2007-05-23 Thomas Kreibich , Robert van Leeuwen , E. K. U. Gross

Reactive chemistry of molecular hydrogen at surfaces, notably dissociative sticking and hydrogen evolution, plays a crucial role in energy storage and fuel cells. Theoretical studies can help to decipher underlying mechanisms and reaction…

Background: The tensor interaction is known to play an important role in the nuclear structure studies of exotic nuclei. However, most microscopic studies of low-energy nuclear reactions neglect the tensor force, resulting in a lack of…

核理论 · 物理学 2018-12-19 Lu Guo , K. Godbey , A. S. Umar

Machine learning is employed to build an energy density functional for self-bound nuclear systems for the first time. By learning the kinetic energy as a functional of the nucleon density alone, a robust and accurate orbital-free density…

核理论 · 物理学 2022-03-21 X. H. Wu , Z. X. Ren , P. W. Zhao

We investigate heterogeneous and homogeneous nucleation in nearest-neighbor and long-range Ising models for various quench depths. We find that the system has a true crossover from heterogeneous to homogeneous nucleation for increasing…

统计力学 · 物理学 2007-05-23 Natali Gulbahce , W. Klein , Harvey Gould

In heavy-ion collisions at intermediate energies, the production and propagation of $\Delta$ particles are crucial to understanding the nuclear equation of state and inferring the properties of nuclear matter at high densities. Based on the…

核理论 · 物理学 2024-05-29 Manzi Nan , Pengcheng Li , Yongjia Wang , Qingfeng Li , Wei Zuo

Nuclear density functional theory is the prevalent theoretical framework for accurately describing nuclear properties at the scale of the entire chart of nuclides. Given an energy functional and a many-body scheme (e.g., single- or…

核理论 · 物理学 2020-06-19 N. Schunck , J. O'Neal , M. Grosskopf , E. Lawrence , S. M. Wild

The supra-molecular structure of a liquid is strongly connected to its dynamics which in turn controls macroscopic properties such as viscosity. Consequently, detailed knowledge about how this structure changes with temperature is essential…

软凝聚态物质 · 物理学 2025-08-05 Jan Philipp Gabriel , Robin Horstmann , Martin Tress

Past experiments about hydrogen absorption in niobium have revealed specific properties about interactions between interstitial hydrogen atoms. It has been reported that there are long-range attractive and short-range repulsive interactions…

材料科学 · 物理学 2020-03-17 Arvind Ramachandran , Houlong Zhuang , Klaus S. Lackner

We study the initial stages of homogeneous melting of a hexagonal ice crystal at coexistence and at moderate superheating. Our trajectory-based computer simulation approach provides a comprehensive picture of the events that lead to…

化学物理 · 物理学 2021-10-04 Clemens Moritz , Phillip L. Geissler , Christoph Dellago

Density-functional theory is a formally exact description of a many-body quantum system in terms of its density; in practice, however, approximations to the universal density functional are required. In this work, a model based on deep…

计算物理 · 物理学 2016-08-02 Jeffrey M. McMahon

The rotating nuclei represent one of most interesting subjects for theoretical and experimental studies. They open a new dimension of nuclear landscape, namely, spin direction. Contrary to the majority of nuclear systems, their properties…

核理论 · 物理学 2016-04-27 A. V. Afanasjev

Recent high precision experimental data for heavy-ion fusion cross sections at energies in the vicinity of the Coulomb barrier systematically show that a strikingly large surface diffuseness parameter for a Woods-Saxon potential is required…

核理论 · 物理学 2017-08-23 K. Hagino , M. Dasgupta , I. I. Gontchar , D. J. Hinde , C. R. Morton , J. O. Newton

The presence of methanol among the common ice components in interstellar clouds and protostellar envelopes has been confirmed by the James Webb Space Telescope. Methanol is often detected in the gas phase toward lines of sight shielded from…

天体物理仪器与方法 · 物理学 2023-08-14 H. Carrascosa , M. Á. Satorre , B. Escribano , R. Martín-Doménech , G. M. Muñoz Caro

We study if commonly used nucleon-nucleon effective interactions, obtained from fitting the properties of cold nuclear matter and of finite nuclei, can properly describe the hot dense nuclear matter produced in intermediate-energy heavy-ion…

核理论 · 物理学 2019-08-21 Jun Xu , Arianna Carbone , Zhen Zhang , Che Ming Ko

The density functional theory of nuclear structure provides a many-particle wave function that is useful for static properties, but an extension of the theory is necessary to describe correlation effects or other dynamic properties. Here we…

核理论 · 物理学 2009-11-11 Y. Alhassid , G. F. Bertsch , L. Fang , B. Sabbey

Water (H2O) ice is an important solid constituent of many astrophysical environments. To comprehend the role of such ices in the chemistry and evolution of dense molecular clouds and comets, it is necessary to understand the freeze-out,…

天体物理学 · 物理学 2009-11-06 Helen J. Fraser , Mark P. Collings , Martin R. S. McCoustra , David A. Williams