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The Compound-Nuclear Reaction and Related Topics (CNR*) international workshop series was initiated in 2007 with a meeting near Yosemite National Park. It has since been held in Bordeaux (2009), Prague (2011), Sao Paulo (2013), Tokyo (2015), and Berkeley, California (2018). The workshop series brings together experts in nuclear theory, experiment, data evaluations, and applications, and fosters interactions among these groups. Topics of interest include: nuclear reaction mechanisms, optical model, direct reactions and the compound nucleus, pre-equilibrium reactions, fusion and fission, cross section measurements (direct and indirect methods), Hauser-Feshbach theory (limits and extensions), compound-nuclear decays, particle and gamma emission, level densities, strength functions, nuclear structure for compound-nuclear reactions, nuclear energy, nuclear astrophysics, and other topics. This peer-reviewed proceedings volume presents papers and poster summaries from the 6th International Workshop on Compound-Nuclear Reactions and Related Topics CNR*18, held on September 24-28, 2018, at Lawrence Berkeley National Lab, Berkeley, CA.
All papers have been peer-reviewed. Compound-nuclear reactions play a crucial role in nuclear astrophysics, nuclear energy, and national security. Although the concept of the compound nucleus dates back to the 1930s, a comprehensive, quantitative description of compound-nuclear reactions remains to be established. CNR* 2007 brought together experts in nuclear theory, experiment, and data evaluation to review current efforts aimed at understanding compound-nuclear reactions and to identify strategies for addressing open questions.
Nuclear Reactions deals with the mechanisms of nuclear reactions and covers topics ranging from quantum mechanics and the compound nucleus to the optical model, nuclear structure and nuclear forces, and direct interactions. The structure of the atomic nucleus and capture of slow neutrons are also discussed, along with nuclear reactions at high energies, neutron capture and nuclear constitution, and elastic and inelastic diffraction scattering. This book is comprised of 17 chapters and begins with an overview of early successes and difficulties experienced by nuclear physics as a discipline, paying particular attention to early applications of quantum mechanics and reactions with neutrons. The next chapter explores the compound nuclear and considers the theory of Breit and Wigner, resonances in nuclear reactions, and the statistical model or compound nucleus model. The reader is methodically introduced to the optical model and elastic scattering experiments; nuclear structure and nuclear forces; and direct interactions. The remaining chapters look at the theory of the effect of resonance levels on artificial disintegration; fluctuations of nuclear reaction widths; scattering of high-energy neutrons by nuclei; and regularities in the total cross-sections for fast neutrons. This monograph will be a useful resource for nuclear scientists and physicists as well as undergraduate students who have taken a first course in quantum mechanics.
The purpose of CNR*15 is to assess the status of knowledge of compound-nuclear reactions, to review current theoretical and experimental efforts aimed at understanding compound-nuclear reactions, to identify areas in need of development, and to outline possible strategies for addressing these needs. The goal is to bring together experts in nuclear theory, experiment, and data evaluation.
The symposium covered the following topics: Physical foundation of preequilibrium reaction models; Randomness in nuclei and nuclear reactions; Statistical multistep compound and direct reactions; Exit channels in nuclear reactions: n, p, α, and γ-emission as well as fission; Multiple emission processes; Parameter systematics for nuclear model calculations; New approaches to angular distributions; Experiments for reaction mechanism studies; Applications for nuclear data evaluation.
Until the publication of the first edition of Introduction to Nuclear Reactions in 2004, an introductory reference on nuclear reactions had been unavailable. Now, fully updated throughout, this second edition continues to provide an authoritative overview of nuclear reactions. It discusses the main formalisms, ranging from basic laws to the final formulae used in academic research to calculate measurable quantities. Well known in their fields, the authors begin with a basic introduction to elements of scattering theory followed by a study of its applications to specific nuclear reactions. Early chapters give a framework of compound nucleus formation and its decay, fusion, fission, and direct reactions, that can be easily understood by the novice. These chapters also serve as prototypes for applications of the underlying physical ideas presented in previous chapters. The largest section of the book comprises the physical models that have been developed to account for the various aspects of nuclear reaction phenomena, including reactions in stellar environments, cosmic rays, and during the big bang. The final chapters survey applications of the eikonal wavefunction and of nuclear transport equations to nuclear reactions at high energies. By combining a thorough theoretical approach with applications to recent experimental data, Introduction to Nuclear Reactions helps you understand the results of experimental measurements rather than describe how they are made. A clear treatment of the topics and coherent organization make this information understandable to students and professionals with a solid foundation in physics as well as to those with a more general science and technology background. Features: Analyses in detail different models of the nucleus and discusses their interrelations. Fully updated throughout, with new sections and additional discussions on stellar evolution, big bang nucleosynthesis, neutron stars and relativistic heavy ion collisions. Discusses the latest developments in nuclear reaction theory and experiments and explores both direct reaction theories and heavy ion reactions, which are newly important to nuclear physics in reactions with rare nuclear isotopes.
The book presents an extended version of the lecture course on the theory of nuclear reactions that has been given by the author for some years in Kiev State University. An account is given of the nonrelativistic nuclear reaction theory. The R — matrix description of nuclear reactions is considered and the dispersion method is formulated. Mechanisms of nuclear reactions and their relationship are studied in detail. Attention is paid to nuclear reactions involving the compound nuclear formation and to direct nuclear processes. The optical model, the diffraction approach and high — energy diffraction nuclear processes involving composite particles are discussed. It also deals with some problems treated only in special journal papers.
An Introduction to Experimental Nuclear Reactions is a book with a concise and simple approach to the subject of experimental nuclear physics. The subject being very technical, it is dealt with in a lucid way so that the reader can grasp the concept and later gain hands-on experience while doing fieldwork. In this book, theoretical, experimental and instrumentation aspects are covered with an emphasis on accelerator-based techniques, which form the basis for the subject of experimental nuclear physics. Other books on similar topics either concentrate on the physics aspects or are more focussed on the instrumentation and radiation detection techniques while accelerator-related concepts are less explained. One of the main standalone features of the book is its to-the-point approach so that the beginner is not lost in the never-ending details. This book discusses the following aspects: Basic introduction to nuclear reactions Two- and three-body kinematics Accelerator-based experimental techniques Basic aspects of the accelerator and accessories Vacuum physics Radiation detector physics and its associated electronics Theoretical modelling and errors This book is mainly intended for students who aspire to pursue a career in experimental nuclear physics research or work in a nuclear accelerator laboratory. Chinmay Basu, PhD, is a researcher in the field of experimental nuclear physics, and his present interests are in the field of low-energy nuclear astrophysics. He is a professor and head of an accelerator facility at the Saha Institute of Nuclear Physics, Kolkata, India.
Until the publication of Introduction to Nuclear Reactions, an introductory reference on nonrelativistic nuclear reactions had been unavailable. Providing a concise overview of nuclear reactions, this reference discusses the main formalisms, ranging from basic laws to the final formulae used to calculate measurable quantities. Well known in their fields, the authors begin with a discussion of scattering theory followed by a study of its applications to specific nuclear reactions. Early chapters give a framework of scattering theory that can be easily understood by the novice. These chapters also serve as an introduction to the underlying physical ideas. The largest section of the book comprises the physical models that have been developed to account for the various aspects of nuclear reaction phenomena. The final chapters survey applications of the eikonal wavefunction to nuclear reactions as well as examine the important branch of nuclear transport equations. By combining a thorough theoretical approach with applications to recent experimental data, Introduction to Nuclear Reactions helps you understand the results of experimental measurements rather than describe how they are made. A clear treatment of the topics and coherent organization make this information understandable to students and professionals with a solid foundation in physics as well as to those with a more general science and technology background.