Giant Resonances

Giant Resonances

This highlights one of the main problems in studying giant resonances , namely that the various resonances overlap in excitation energy . To make matters even worse , they also have a large width of 3-5 MeV in the 2ħw excitation ...

Author: M. N. Harakeh

Publisher: Oxford University Press on Demand

ISBN: 0198517335

Category: Science

Page: 638

View: 919

Resonances are a common feature of many systems in nature. They reveal much about the structure of such systems. The present book provides a comprehensive and up-to-date account of a similar phenomenon in atomic nuclei, the giant resonances. It describes experimental facts, how these are obtained, and how they fit into existing theoretical models. It also includes a short history and an overview of the main achievements in this field.
Categories: Science

Giant Resonances

Giant Resonances

2.6 Gamma - Decay of Giant Resonances The basic property of photon decay is its extreme sensitivity to the multipolarity of the giant resonance . This can be seen from Figure 2.9 , where the groundstate gamma width ry expected for a ...

Author: P. F. Bortignon

Publisher: CRC Press

ISBN: 9781351444897

Category: Science

Page: 296

View: 513

This volume presents a comprehensive introduction to the study of nuclear structure at finite temperature. By measuring the frequencies of the high-energy photons emitted or absorbed by an atomic nucleus it is possible to visualize the structure of that nucleus. In such experiments it is observed that the atomic nucleus displays resonant behavior, absorbing or emitting photons within a relatively narrow range of frequencies. To study emission processes one measures the y-decay of compound nuclei, and by this means it is possible to probe the structure of the nucleus at finite temperature. This book is divided into two main parts: the study of giant resonances based on the atomic nucleus ground state (zero temperature), and the study of the y-decay of giant resonances from compound (finite temperature) nuclei. As this work is an outgrowth of their lectures to fourth-year students at the University of Milan, the authors have placed special emphasis on the general concepts that form the foundation of the phenomenon of giant resonances. This basic subject matter is supplemented with material taken from work going on at the forefront of research on the structure of hot nuclei. Thus, this volume will serve as an essential reference for both young researchers and experienced practitioners.
Categories: Science

Electric and Magnetic Giant Resonances in Nuclei

Electric and Magnetic Giant Resonances in Nuclei

The Isovector Giant Dipole Resonance : GDR Of all the resonances the isovector dipole resonance is known best . It has been extensively studied now for almost 40 years . Its main features have been very well documented in various review ...

Author: J. Speth

Publisher: World Scientific

ISBN: 9810237987

Category: Science

Page: 648

View: 618

This is the most recent and complete review on giant resonances in nuclei. It includes electric as well as magnetic collective states and a detailed discussion on the excitation mechanisms and the decay properties is given.
Categories: Science

Giant Resonances in Atoms Molecules and Solids

Giant Resonances in Atoms  Molecules  and Solids

(iv) If a 'giant resonance' is present in an atom, then we expect to find it, with perhaps slight variations of the profile shape, in molecules containing this atom, or indeed in the condensed phase. This persistence of the resonance is ...

Author: J.P. Connerade

Publisher: Springer

ISBN: 9781489920041

Category: Technology & Engineering

Page: 570

View: 668

Often, a new area of science grows at the confines between recognised subject divisions, drawing upon techniques and intellectual perspectives from a diversity of fields. Such growth can remain unnoticed at first, until a characteristic fami ly of effects, described by appropriate key words, has developed, at which point a distinct subject is born. Such is very much the case with atomic 'giant resonances'. For a start, their name itself was borrowed from the field of nuclear collective resonances. The energy range in which they occur, at the juncture of the extreme UV and the soft X-rays, remains to this day a meeting point of two different experimental techniques: the grating and the crystal spectrometer. The impetus of synchrotron spectroscopy also played a large part in developing novel methods, described by many acronyms, which are used to study 'giant resonances' today. Finally, although we have described them as 'atomic' to differentiate them from their counterparts in Nuclear Physics, their occurrence on atomic sites does not inhibit their existence in molecules and solids. In fact, 'giant resonances' provide a new unifying theme, cutting accross some of the traditional scientific boundaries. After much separate development, the spectroscopies of the atom in various environments can meet afresh around this theme of common interest. Centrifugal barrier effects and 'giant resonances' proper emerged almost simultaneously in the late 1960's from two widely separated areas of physics, namely the study of free atoms and of condensed matter.
Categories: Technology & Engineering

Giant Resonance Phenomena in Intermediate Energy Nuclear Reactions

Giant Resonance Phenomena in Intermediate Energy Nuclear Reactions

This phenomenon was termed the "nuclear giant resonance", and was quickly interpreted by Goldhaber and Teller (1948) as the excitation of a collective mode of nuclear vibrations in which all the protons in the nucleus moved together ...

Author: F. Cannata

Publisher: Springer

ISBN: 9783540382577

Category: Science

Page: 114

View: 763

Categories: Science

NBS Monograph

NBS Monograph

The T = } part of the N13 giant resonance has been excited [ 135 ] in the reaction C12 ( p , yo ) N13 . ... O'Connell [ 138 ] has derived a sum rule relating the strengths of the two giant resonances to the mean square radius of the ...

Author:

Publisher:

ISBN: MINN:30000010266561

Category: Physics

Page:

View: 433

Categories: Physics

Nuclear Reaction Dynamics Of Nucleon hadron Many Body System From Nucleon Spins And Mesons In Nuclei To Quark Lepton Nuclear Physics Proceedings Of The 14th Rcnp Osaka International Symposium

Nuclear Reaction Dynamics Of Nucleon hadron Many Body System   From Nucleon Spins And Mesons In Nuclei To Quark Lepton Nuclear Physics   Proceedings Of The 14th Rcnp Osaka International Symposium

Highly Excited States and Giant Resonances in Nuclei Mamoru Fujiwara Research Center for Nuclear Physics, Osaka University, Mihigaoka 10-1, Ibaraki, Osaka 567, Japan E-mail: mamoru Orcnpax.rcmp.osaka-u.ac.jp ABSTRACT Experiments to ...

Author: Ejiri Hiroyasu

Publisher: World Scientific

ISBN: 9789814547598

Category:

Page: 512

View: 576

The 14th RCNP OSAKA International Symposium on Nuclear Reaction Dynamics of Nucleon-Hadron Many Body System was held in Osaka from December 6 to 9, 1995. The symposium covered current topics from Nucleon Spins and Mesons in Nuclei to Quark Lepton Nuclear Physics. Thus it included the field of hadron/nuclear physics from sub-GeV to multi-GeV energy region, as well as recent activities and development at RCNP. It was also intended to be a kind of winter school for young researchers/graduate students.This proceedings consists of the invited talks and lectures presented by leading physicists in the field and short oral presentations.
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Fiscal year 1985 Department of Energy authorization

Fiscal year 1985 Department of Energy authorization

One of the disadvantages of heavy - ion , inelastic excitation of giant resonances is that the shapes of the low - l transfer angular distribution are nearly identical , hence , identification of resonance multipolarity is not possible ...

Author: United States. Congress. House. Committee on Science and Technology. Subcommittee on Energy Development and Applications

Publisher:

ISBN: MINN:31951D03580002G

Category:

Page:

View: 584

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Nuclear Structure in China 2010

Nuclear Structure in China 2010

The nuclear isoscalar giant resonances actually correspond to the nuclear collective excitations with different values of l. However, the nuclear isovector giant resonances correspond to the nuclear collective excitation states that the ...

Author: Hong-Bo BAI

Publisher: World Scientific

ISBN: 9789814458429

Category: Science

Page: 292

View: 978

This volume is a collection of the contributions to the 13th National Conference on Nuclear Structure in China (NSC2010). It provides an important updated resource in the nuclear physics literature for researchers and graduate students studying nuclear structure and related topics. Recent progress made in the study of exotic nuclear structure, the structure and synthesis mechanism of superheavy nuclei, nuclear astrophysics, and the development of quantum many body approaches are covered. Contents:Personal View on Nuclear Physics Research (Jie Meng)Wobbling Rotation in Atomic Nuclei (Y S Chen and Zao-Chun Gao)Production of Heavy Isotopes with Collisions between Two Actinide Nuclides (Z Q Feng et al.)Complex Scaling Method and the Resonant States (Jian-You Guo et al.)Rotational Bands in Transfermium Nuclei (X T He)The Evolution of Protoneutron Stars with Kaon Condensate (Ang Li)Covariant Description of the Low-Lying states in Neutron-Deficient Krisotopes (Z X Li et al.)New Band Structures in Odd-Odd 120I and 122I (Liu GongYe et al.)Cross Section Distributions of Fragments in the Calcium Isotopes Projectile Fragmentation at the Intermediate Energy (C W Ma et al.)Uncertainties of Th/Eu and Th/Hf Chronometers From Nucleus Masses (Z M Niu et al.)A Theoretical Prospective on Triggered Gamma Emission From 178Hfm2 Isomer (ShuiFa Shen et al.)The study of the Neutron N=90 Nuclei (W X Teng et al.)and other papers Readership: Graduate students and professionals working in the field of nuclear physics. Keywords:Nuclear Structure;Exotic Nuclei;Density Functional Theory;Shell Model;Superheavy Elements;Nuclear Astrophysics
Categories: Science

Collective Excitations In Fermi And Bose Systems

Collective Excitations In Fermi And Bose Systems

THE ISOSCALAR GIANT DIPOLE RESONANCE : WHAT'S NEW ? ... 1 Introduction 1.1 Giant Resonances over the years Giant resonances are highly collective modes of nuclear excitation in which a large fraction of the nucleons of a nucleus move ...

Author: Carlos A Bertulani

Publisher: World Scientific

ISBN: 9789814544078

Category:

Page: 576

View: 262

Collective excitations in Fermi and Bose systems are key phenomena in understanding the structure and dynamics of many-body systems with the manifestation of different statistics. This volume presents recent developments in atomic and nuclear physics which have revealed intriguing features which are under intense scrutiny by both theorists and experimentalists.
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