Detnex Project: Dispersion, Structure and Tracking of Exotic Nuclei (original) (raw)
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1.1 General survey It is customary to regard nuclear physics as the field of study that includes the structure of atomic nuclei, the reactions that take place between them, and the techniques, both experimental and theoretical, that shed light on these subjects. Rigid adherence to such limits would, however, exclude much that is both exciting and informative. The nucleus entered physics as a necessary component of the atomic model and nuclear effects in spectroscopy and solid state physics now provide not only elegant methods for determination of nuclear properties but also convincing demonstrations of the powers of quantum mechanics. Equally, those particles sometimes described as elementary or fundamental, although first recognized in the cosmic radiation, soon assumed a role of importance in nuclear problems, especially in the understanding of the forces between neutrons and protons. Advances in the study of particles, or sub-nuclear physics, besides leading to the discovery of new and previously unsuspected physical laws, have frequently stimulated back-reference to complex nuclei
RECENT TRENDS IN NUCLEAR PHYSICS
In Europe, the United States, and Japan, there is a worldwide effort to set up powerful research facilities that can provide beams of radioactive nuclei of various kinds, as well as beams of exceptionally enormous energies, to study the origins of the physical world. Complex and massive detector arrays with better technical capabilities are either created around or independently of these facilities (dedicated to cosmic rays). Superheavy nuclei, cold binary and ternary fission and nuclear shell structure are just a few of the areas where progress has been achieved recently. Cosmic rays have an energy spectrum that is beyond the capabilities of artificial accelerators. The installation of a massive detector array has been agreed upon by an international consortium. The field of nuclear physics is expanding in three distinct directions. Investigations on the behaviour of hot and dense nuclear materials are among them. Gluons and quarks make up the nuclear force. Distinction between stable and unstable nuclei. For the sake of this presentation, we will only be discussing the research of exotic nuclei, ranging from stability to the drip line. Nuclear force, nuclear stability, and shell structure and shape have all been studied in this study. Nuclei with a short lifespan are being produced using new experimental techniques. The fabrication of heavy nuclei with Z=114 and beyond has made significant progress.
International Symposium on Exotic Nuclei
The differential cross sections of elastic and inelastic ("C', 2+, 4.44 MeV) scattering of 'Li on I2C were measured in the angular range from 10' to 95" in the c.m. system with resolution of f0.7". Calculations of angular distributions of the elastic and inelastic scattering were performed in the framework of the optical model and the DWBA method, respectively. We propose a set of parameters of the optical potential for the interaction of 'Li at 50-80 MeV with target nuclei having mass from 12 to 208. The possibilities of future experiments using radioactive beams at DRlBs are discussed.
A program in medium-energy nuclear physics. Progress report, January 1, 1992--March 31, 1995
1994
This progress report and continuation proposal summarizes our achievements for the period &om July 1, 1994 to September 30, 1995 and requests continued fbnding for our program in experimental medium-energy nuclear physics. The focus of our program remains the understanding of the short-range part of the strong interaction in the nuclear medium. Ln the past year we have focused our attention ever more sharply on experiments with real tagged photons, and we have successfblly defended two new experimental proposals: Photofision of Actinide ami Preuctinide Nuclei at S A L and Pho fopr&ction of the p Mesonj-om the Proton with Linearly Polarized Photons at CEBAF. (We are cospokespersons on two previously approved Hall-B experiments at CEBAF, Photoreactions on 3He and Photoabsorption and Photofission of Nuclei.) As part of the team that is instrumenting the Photon Tagger for Hall B; we report excellent progress on the focal-plane detector array that is being built at our Nuclear Detector Laboratory, as well as progress on our plans for instrumentation of a tagged polarized-photon beam using coherent bremsstrahlung. Also, we shall soon receive a large computer system (from the SSC) which will form the basis for our new Data Analysis Center, which, like the Nuclear Detector Laboratory, will be operated under the auspices of The George Washington University Center for Nuclear Studies. Finally, during the past year we have published six more papers on the results of our measurements of pion scattering at LAMPF and of electron scattering at NMHEF and Bates, and we can report that nearly all of the remaining papers documenting this long series of measurements are in the pipeline. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or senice by trade name, trademark, manufacturer. or otherwise docs not necessarily constitute or imply its endorsement, recornmendktion, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. DISCLAIMER Portions of this document may be illegible electronic image products. Images are produced from the best available original document.
Acta Physica Hungarica A) Heavy Ion Physics, 2006
We report on applications of the ab initio, no-core shell model with the primary goal of achieving an accurate description of nuclear structure and reactions from the fundamental inter-nucleon interactions. We show that realistic two-nucleon interactions are inadequate to describe the low-lying structure of 10 B, and that realistic three-nucleon interactions are essential. We report preliminary attempts to compute astrophysical S-factors