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Description Of Light Ion Collisions In The Time Dependent Cluster Model
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Book Synopsis Description of Light-ion Collisions in the Time-dependent Cluster Model by : M. (Niels Bohr Institutet) Ploszajczak
Download or read book Description of Light-ion Collisions in the Time-dependent Cluster Model written by M. (Niels Bohr Institutet) Ploszajczak and published by . This book was released on 1985 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-dependent Description of Heavy-ion Collisions by : Hao Lin
Download or read book Time-dependent Description of Heavy-ion Collisions written by Hao Lin and published by . This book was released on 2020 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we aim to advance the time-dependent transport theories for the description of heavy-ion collisions, from two perspectives. As an attempt to address multifragmentation in nuclear collisions, we develop a stochastic transport model based on one-body Langevin dynamics. The new model is subsequently tested and benchmarked with a series of other existing models with satisfaction. The model is also applied to address and confirm the so-called "hierarchy effect" observed in the multifragmentation for certain systems around Fermi energies. Parallel to the development towards a stochastic theory, we also extend an approach based on non-equilibrium Green's function for the description of correlated nuclear systems in one dimension.Firstly, we present a new framework to treat the dissipation and fluctuation dynamics associated with nucleon-nucleon scattering in heavy-ion collisions. The two-body collisions are effectively described in terms of the diffusion of nucleons in viscous nuclear media, governed by a set of Langevin equations in momentum space. The new framework combined with the usual mean-field dynamics, forming the basis of the new stochastic model, can be used to simulate heavy-ion collisions at intermediate energies.Subsequently, as a proof of principle for the new model, we simulate Au + Au reactions 100 MeV/nucleon and at 400 MeV/nucleon and look at observables such as rapidity distribution and flow as a function of rapidity. The results are found to be consistent with other existing models under the same constrained conditions. To demonstrate the model's ability to describe multifragmentation, we also study the formation of fragments in Sn +Sn reactions at 50 MeV/nucleon, and the fragment distribution and properties are discussed and compared to two other models commonly employed for collisions.Next, we move on to tackle the "hierarchy effect" observed experimentally for reactions around Fermi energies. We simulate Ta + Au at 39.6 MeV/nucleon and compare mainly the charge and velocity distributions of the fragments from the QP with experimental data. Our simulation results can reproduce the trends observed in data, and a semi-quantitative agreement can be reached. This is the first time, to our knowledge, that one has succeeded in addressing the "hierarchy effect" with a dynamic model. The simulation of U + C is also discussed.Finally, we present a fully quantum-mechanical model based on non-equilibrium Green's function, with short-range two-body correlations incorporated as an extension. We examine its applications to one-dimensional nuclear systems, such as the preparation and properties of the ground states, the isovector oscillation of symmetric systems and the boosting of a"slab" in a periodic box. In particular, the dissipation brought by two-body correlations and the Galilean covariance of the theory are demonstrated. These studies lay the groundwork for the future exploration of collisions of correlated nuclear systems in one dimension.
Book Synopsis Nuclear Physics in the 1990's by : D.H. Feng
Download or read book Nuclear Physics in the 1990's written by D.H. Feng and published by Elsevier. This book was released on 2016-06-04 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear Physics in the 1990's
Book Synopsis Progress of Time-Dependent Nuclear Reaction Theory by : Yoritaka Iwata
Download or read book Progress of Time-Dependent Nuclear Reaction Theory written by Yoritaka Iwata and published by Bentham Science Publishers. This book was released on 2019-07-03 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of the latest theoretical methods for treating models in nuclear reactions. Initial chapters in this volume explain different aspects of time-dependent nuclear density functional theory, such as numerical calculations, density constrained models, multinucleon transfer reactions, and superfluid time dependent density functional theory. In addition, the volume also presents chapters covering other topics in nuclear physics, such as quantum molecular dynamics, cluster models in stable and unstable nuclei, chain structure theory in light nuclei, many-body systems and more. The volume is intended as a guidebook for graduate students and researchers to understand recent theories used in applied nuclear particle physics and astrology.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Perspectives in Heavy Ion Physics by : Massimo Di Toro
Download or read book Perspectives in Heavy Ion Physics written by Massimo Di Toro and published by . This book was released on 1993 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Cluster Dynamics by : Paul-Gerhard Reinhard
Download or read book Introduction to Cluster Dynamics written by Paul-Gerhard Reinhard and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clusters as mesoscopic particles represent an intermediate state of matter between single atoms and solid material. The tendency to miniaturise technical objects requires knowledge about systems which contain a "small" number of atoms or molecules only. This is all the more true for dynamical aspects, particularly in relation to the qick development of laser technology and femtosecond spectroscopy. Here, for the first time is a highly qualitative introduction to cluster physics. With its emphasis on cluster dynamics, this will be vital to everyone involved in this interdisciplinary subject. The authors cover the dynamics of clusters on a broad level, including recent developments of femtosecond laser spectroscopy on the one hand and time-dependent density functional theory calculations on the other.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-02 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics and Thermodynamics with Nuclear Degrees of Freedom by : Philippe Chomaz
Download or read book Dynamics and Thermodynamics with Nuclear Degrees of Freedom written by Philippe Chomaz and published by Springer Science & Business Media. This book was released on 2007-07-28 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the outcome of a community-wide review of the field of dynamics and thermodynamics with nuclear degrees of freedom. It presents the achievements and the outstanding open questions in 26 articles collected in six topical sections and written by more than 60 authors. All authors are internationally recognized experts in their fields.
Download or read book Physics Briefs written by and published by . This book was released on 1991 with total page 1454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ion-Atom Collisions by : Matthew Baxter
Download or read book Ion-Atom Collisions written by Matthew Baxter and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-dependent density functional theory (TDDFT) is an alternate formulation of time-dependent N-body quantum mechanics which allows one to describe a system via the single-particle density, n, rather than the full N-body wave function. While this reformulation is in theory exact in practice it necessitates at least two approximations. First, the exchange-correlation potential which encodes the two-particle interactions present in the time-dependent Schrdinger equation into the language of the single-particle description is not precisely known. Even if one had perfect knowledge of this potential a further approximation would be required when attempting to extract the values of observables as the exact relation between the one-particle density and most observables of interest is also unknown. This dissertation investigates these issues using ion-atom collision systems as a testbed. First, the observable problem is explored in antiproton-helium, proton-helium, and He^{2+}-He collision systems. Total cross sections for all charge transfer processes in these systems, the observables of choice in the present situation, are determined using a two-centred extension of a correlation-integral model that was originally applied to single-centred situations. Following this theoretical total cross section results for all ionization/capture processes in the He^{+}-He collision system are presented in the approximate impact energy range 10-1000 keV/amu. Calculations were performed within the framework of a spin-dependent extension of TDDFT. These cross sections are used as a benchmark to test an accurate exchange-correlation potential generated via the Krieger-Li-Iafrate approximation applied within the exchange-only limit in which correlation is ignored. The results of two models, one where electron translation factors in the orbitals used to calculate the potential are ignored and another where partial electron translation factors are included, are compared with available experimental data as well as a selection of previous theoretical calculations.
Download or read book INIS Atomindeks written by and published by . This book was released on 1987 with total page 1362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Interactions by : David A. Micha
Download or read book Molecular Interactions written by David A. Micha and published by John Wiley & Sons. This book was released on 2020-01-02 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern, comprehensive text and reference describing intermolecular forces, this book begins with coverage of the concepts and methods for simpler systems, then moves on to more advanced subjects for complex systems – emphasizing concepts and methods used in calculations with realistic models and compared with empirical data. Contains applications to many physical systems and worked examples Proceeds from introductory material to advanced modern treatments Has relevance for new materials, biological phenomena, and energy and fuels production
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1977 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Data for Science and Technology by : K.H. Bockhoff
Download or read book Nuclear Data for Science and Technology written by K.H. Bockhoff and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1049 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the International Conference, Antwerp, Belgium, September 6-10, 1982