A Vision for Nuclear Theory

NUCLEAR AND PARTICLE PHYSICS AN INTRODUCTION, 2021

Journal of Physics: Conference Series, 2010

It is more than a century since the discovery by J. J. Thomson of the electron. The electron is still thought to be a structureless point particle, and one of the elementary particles of Nature. Other particles that were subsequently discovered and at firstthought to be elementary, like the proton and the neutron, have since been found to have a complex structure. What then are the ultimate constituents of matter? How are they categorised? How do they interact with each other? What, indeed, should we ask of a mathematical theory of elementary particles? Since the discovery of the electron, and more particularly in the last sixty years, there has been an immense amount of experimental and theoretical effort to determine answers to these questions. The present Standard

1999

This paper briefly reviews the present status of strange nuclearphysics. Recently, significant progress has been made. Oneexample to be discussed is a new, electroproduction experimentwhich offers the possibility of obtaining hypernuclearspectra with at least a factor of 3 better resolution thanpreviously. However, many different experiments impact a spectrumof problems from weak interactions to astrophysics. Although inthis short paper it is not possible to cover many topics in depth,sufficient information is provided so that the interested readercan obtain all of the most relevant material.

2017

The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made.

1977

1986

The .published works since July i, 1986 are divided into three broad categoriess A. Spin Physics in Nuclei# B. Surprising Near Degeneracies and C. Incom?resslbility, Isotope Shifts and Breathing Mode States. A, Spln Physics in Nuclei i. Operator [_(1)X_(2)]It.(1)t.(2): Signature Selection Rules, Phys. Rev. C34, (1986)290 with E. Moya de Ouerra 2. New Spin Modes in Nuclei, Physics Reports C148, (1987)217 with B. Casuel 3. Collective Magnetic Dipole Transitions: Dependence of the Energies and Rates on the Nuclear Effective Interactiont Nucl. Phys. A467, (1987)29 with Huan Liu 4. The Rotational and the Shell Model Pictures of Magnetic Dipole Excitations, Phys. Rev. C36, (1987)2057 with Huan Liu 48 5. Collective Magnetic Multipole Excltations in Open Shells: TJ, _ Phys. Rev. C36, (1987)2064 with Huan Liu 6. Magnetic Mc,nents of Excited States in Stable Chromium Isotopes, Phys. Rev. C36, (1987)20_8 with N. Bencyer Koller and collaborators 7. Relations between Gamow-Teller and M_)gnetic Dipole Transitions,

Recent Developments in Theoretical Physics, 2009

Nuclear Physics has had its ups and downs. However in recent years, bucked up by some new and often puzzling data, it has become a potentially very rich field. We review some of these exciting developments in a few important sectors of nuclear physics. Emphasis shall be on the study of exotic nuclei and the new physics that these nuclei are teaching us.

1979

isara solutions, 2021

Nuclear physics provides information about the structure of nuclei that can be obtained from highenergy electron scattering experiments. The results of these experiments show that the density of nuclear matter is roughly the same at the center of all nuclei. The nuclear density increases with A, but appears to approach a limiting value of about 0.17 nucleons per fm−3 for large A. All nuclei appear to have an inner region where the density is approximately uniform and a thin surface region where the distribution of nuclear matter falls off exponentially to zero. The binding energy and mass of nuclei can be accurately described by empirical formulas. Superimposed upon the slowly varying properties of the nucleus described by the empirical formulas are deviations that are quantum mechanical in nature. The protons and neutrons in the nucleus move in a finite region of space with definite values of the angular momentum. The description of the nucleus in terms of the angular momentum of individual nucleons, which is known as the shell mode, makes it possible to understand the spin and parity of nuclei and to describe the spectra of excited states.