Download or read book Microscopic Approaches to Nuclear Structure Calculations written by Società italiana di fisica and published by . This book was released on 1986 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microscopic Approaches to Nuclear Structure Calculations written by Università di Napoli. Struttura della Materia e Fisica Applicata. Dipartimento di Fisica Nucleare and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microscopic approaches to nuclear structure calculations written by A. Covello and published by . This book was released on 1986 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Algebraic Approaches to Nuclear Structure written by A. Castenholz and published by CRC Press. This book was released on 2020-10-07 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to algebraic models and their applications. It presents a simple, but thorough, pedagogic approach, starting from the most elementary ideas and building up to the most recent results of advanced theories. The book is designed for a graduate level treatment.
Download or read book The Future of Nuclear Structure Challenges and Opportunities in the Microscopic Description of Nuclei written by Luigi Coraggio and published by Frontiers Media SA. This book was released on 2021-03-10 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microscopic Calculations of Nuclear Structure and Nuclear Correlations written by and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major goal in nuclear physics is to understand how nuclear structure comes about from the underlying interactions between nucleons. This requires modelling nuclei as collections of strongly interacting particles. Using realistic nucleon-nucleon potentials, supplemented with consistent three-nucleon potentials and two-body electroweak current operators, variational Monte Carlo methods are used to calculate nuclear ground-state properties, such as the binding energy, electromagnetic form factors, and momentum distributions. Other properties such as excited states and low-energy reactions are also calculable with these methods.
Download or read book Advances in Time Dependent Methods for Nuclear Structure and Dynamics written by Paul Denis Stevenson and published by Frontiers Media SA. This book was released on 2021-03-08 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Structure Calculations for Astrophysical Applications written by and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here we present calculated results on such diverse properties as nuclear energy levels, ground-state masses and shapes, [beta]-decay properties and fission-barrier heights. Our approach to these calculations is to use a unified theoretical framework within which the above properties can all be studied. The results are obtained in the macroscopic-microscopic approach in which a microscopic nuclear-structure single-particle model with extensions is combined with a macroscopic model, such as the liquid drop model. In this model the total potential energy of the nucleus may be calculated as a function of shape. The maxima and minima in this function correspond to such features as the ground state, fission saddle points and shape-isomeric states. Various transition rate matrix elements are determined from wave-functions calculated in the single-particle model with pairing and other relevant residual interactions taken into account.
Download or read book Global Nuclear structure Calculations written by and published by . This book was released on 1990 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The revival of interest in nuclear ground-state octupole deformations that occurred in the 1980's was stimulated by observations in 1980 of particularly large deviations between calculated and experimental masses in the Ra region, in a global calculation of nuclear ground-state masses. By minimizing the total potential energy with respect to octupole shape degrees of freedom in addition to?2 and?4 used originally, a vastly improved agreement between calculated and experimental masses was obtained. To study the global behavior and interrelationships between other nuclear properties, we calculate nuclear ground-state masses, spins, pairing gaps and?-decay and half-lives and compare the results to experimental qualities. The calculations are based on the macroscopic-microscopic approach, with the microscopic contributions calculated in a folded-Yukawa single-particle potential.
Download or read book ON THE MICROSCOPIC AND MACROSCOPIC ASPECTS OF NUCLEAR STRUCTURE WITH APPLICATIONS TO SUPERHEAVY NUCLEI written by and published by . This book was released on 1969 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis is concerned with the relation between a microscopic approach and a macroscopic approach to the study of the nuclear binding energy as a function of neutron number, proton number and nuclear deformations. First of all we give a general discussion of the potential energy of a system which can be divided into a bulk region and a thin skin layer. We find that this energy can be written down in the usual liquid drop type of expression, i.e., in terms of the volume, the surface area and other macroscopic properties of the system. The discussion is illustrated by a study of noninteracting particles in an orthorhombic potential well with zero potential inside and infinite potential outside. The total energy is calculated both exactly (a microscopic approach) and also from a liquid drop type of expression (a macroscopic approach). It turns out that the latter approach reproduces the smooth average of the exact results very well. We next make a digression to study the saddle point shapes of a charged conducting drop on a pure liquid drop model. We compare the properties of a conducting drop with those of a drop whose charges are distributed uniformly throughout its volume. The latter is the usual model employed in the study of nuclear fission. We also determined some of the more important symmetric saddle point shapes. In the last part of the thesis we generalize a method due to Strutinski to synthesize a microscopic approach (the Nilsson model) and a macroscopic approach (the liquid drop model). The results are applied to realistic nuclei. The possible occurrence of shape isomers comes as a natural consequence of the present calculation. Their trends as a function of neutron and proton members are discussed and the results are tabulated. We also work out the stabilities of the predicted superheavy nuclei with proton number around 114 and neutron number around 184 and 196. Some of these nuclei appear to have extremely long life times. The possible experimental production of these superheavy nuclei are also discussed.
Download or read book Microscopic Approach to Heavy ion Reactions written by Kirsten Vo-Phuoc and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy-ion reactions are affected by the nuclear structure of the reactants and other dynamical processes during the collision. Theoretical studies of such reactions lead to a clearer understanding of prohibitive mechanisms to heavy-ion fusion. One application of this is superheavy element formation, where quasifission is the major competing process to the formation of a compound nucleus in this region of the nuclear chart. Microscopic approaches that use mean field approximations, such as the time-dependent Hartree-Fock (TDHF) theory, have been increasingly used to study low energy heavy-ion reactions. In addition to reactions, nuclear structure properties can also be studied with microscopic theory. Such approaches do not require empirical knowledge of the nucleus and can be used as a predictive tool for studying structure or reactions involving exotic nuclei. In this thesis, TDHF is used to study nuclear vibrations and heavy-ion reactions at near barrier energies. The TDHF approach is applied first to a systematic study of low-lying octupole and quadrupole vibrational modes of {40-54}Ca isotopes. Then, fusion reactions are calcuated for Ca+Sn systems, using the barrier energy as the main observable. Fusion reactions are first calculated with no couplings (static HF calculations) before including all dynamics that the mean field approximation offers (TDHF calculations). The addition of dynamics often results in a lower fusion barrier compared to the static barrier, with the exception of systems involving the neutron rich {52,54}Ca projectiles. The difference in fusion barriers between the two sets of calculations are explored by considering couplings to vibrational states and transfer channels. To separate the effects of individual couplings, the coupled-channels approach is used with the HF calculations of the vibrational states as inputs. Such couplings account for most of the lowering of the static barrier. For the most neutron rich systems, coupling to vibrational states does not account for the dynamical barrier increase. Transfer channels, in particular proton pickup, are explored within TDHF and may play a role in this increased barrier energy. Following from fusion reactions, the factors and dynamics that may hinder fusion in heavier systems are studied in the reactions 48Ca, 50Ti, 52Cr, 54Fe, 56,64Ni, 58Zn+208Pb at energies ranging from 0% to 30% above the static HF barrier. Although most of these systems fuse at energies within this range, some systems reseparate for which emission of nucleons was apparent at scission point. The contact times were in most cases less than 10 zs and the attempt at $N/Z$ equilibration of these systems happen on fast time scales (1-2 zs). Larger amounts of mass transfer occur in systems with longer neck times and fewer magic numbers such as 34S+232Th and Cr+Pt systems that were also calculated for comparison. Further studies are required to better understand the role of shell effects as well as nucleon emission in quasifission reactions, and subsequently reactions leading to superheavy element formation.
Download or read book Microscopic Nuclear structure Calculations for the Neutrino and LSP scattering Processes written by Eero Holmlund and published by . This book was released on 2004 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Methods And Nuclear Equation Of State written by Marcello Baldo and published by World Scientific. This book was released on 1999-11-15 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical study of the nuclear equation of state (EOS) is a field of research which deals with most of the fundamental problems of nuclear physics. This book gives an overview of the present status of the microscopic theory of the nuclear EOS. Its aim is essentially twofold: first, to serve as a textbook for students entering the field, by covering the different subjects as exhaustively and didactically as possible; second, to be a reference book for all researchers active in the theory of nuclear matter, by providing a report on the latest developments. Special emphasis is given to the numerous open problems existing at present and the prospects for their possible solutions.The general framework of the different approaches presented in the book is the meson theory of nuclear forces — where no free parameter is introduced — and the many-body treatment of nucleon-nucleon correlations. The ultimate hope of this world-wide effort is the understanding of the structure of nuclear matter, both in the ground state and at finite temperature.The main audience addressed is the community of theoretical nuclear physicists, but nuclear experimentalists and astrophysicists will also find in the book an extensive amount of material of direct interest for their everyday work, particularly for those studying heavy-ion collisions, where the nuclear EOS is of special relevance. Finally, theoretical physicists working on elementary particle theory could find in the book some stimulating ideas and problems directly related to their field.
Download or read book Computational Nuclear Physics 1 written by K. Langanke and published by Springer Science & Business Media. This book was released on 2013-11-22 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of standard problems in theoretical nuclear-structure physics is addressed by the well-documented computer codes presented in this book. Most of these codes were available up to now only through personal contact. The subject matter ranges from microscopic models (the shell, Skyrme-Hartree-Fock, and cranked Nilsson models) through collective excitations (RPA, IBA, and geometric model) to the relativistic impulse approximation, three-body calculations, variational Monte Carlo methods, and electron scattering. The 5 1/4'' high-density floppy disk that comes with the book contains the FORTRAN codes of the problems that are tackled in each of the ten chapters. In the text, the precise theoretical foundations and motivations of each model or method are discussed together with the numerical methods employed. Instructions for the use of each code, and how to adapt them to local compilers and/or operating systems if necessary, are included.
Download or read book Structure of Atomic Nuclei written by L. Satpathy and published by Alpha Science Int'l Ltd.. This book was released on 1999 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an outcome or a SERC School on the nuclear physics on the theme ?Nuclear Structure?. The topics covered are nuclear many-body theory and effective interaction, collective model and microscopic aspects of nuclear structure with emphasis on details of technique and methodology by a group of working nuclear physicists who have adequate expertise through decades of experience and are generally well known in their respective fieldsThis book will be quite useful to the beginners as well as to the specialists in the field of nuclear structure physics.
Download or read book Nuclear Collective Motion Models And Theory written by David J Rowe and published by World Scientific. This book was released on 2010-05-31 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two most important developments in nuclear physics were the shell model and the collective model. The former gives the formal framework for a description of nuclei in terms of interacting neutrons and protons. The latter provides a very physical but phenomenological framework for interpreting the observed properties of nuclei. A third approach, based on variational and mean-field methods, brings these two perspectives together in terms of the so-called unified models. Together, these three approaches provide the foundations on which nuclear physics is based. They need to be understood by everyone practicing or teaching nuclear physics, and all those who wish to gain an understanding of the foundations of the models and their relationships to microscopic theory as given by recent developments in terms of dynamical symmetries.This book provides a simple presentation of the models and theory of nuclear collective structure, with an emphasis on the physical content and the ways they are used to interpret data. Part 1 presents the basic phenomenological collective vibrational and rotational models as introduced by Bohr and Mottelson and their many colleagues. It also describes the extensions of these models to parallel unified models in which neutrons and protons move in a mean-field with collective degrees of freedom. Part 2 presents the predominant theories used to describe the collective properties of nuclei in terms of interacting nucleons. These theories, which are shared with other many-body systems, are shown to emerge naturally from the unified models of Part 1.
Download or read book Lectures on the Microscopic Theory of Nuclear Structure written by Vincent Gillet and published by . This book was released on 1970 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
