Photoexcitation of Nuclear Isomers PDF Download
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Author: Thomas H. Dupree
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Author: Thomas H. Dupree
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
Author: Árpád Veres
Publisher: Akademiai Kiads
ISBN:
Category : Science
Languages : en
Pages : 208
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Book Description
In the recent years it has been recognized that experiments with isomers of stable nuclei offer great scientific opportunities for the study of rare but important nuclear species. This field is now considered as one of the priority areas for nuclear astrophysics and gamma-ray laser-technique for the coming decade. Gamma ray line astronomy has a unique potential to provide information on nuclear processes and high energy interaction going on presently in the universe. Despite many negative conclusions the investigators have found for more obvious proposals, and there are more potential approaches to X-ray laser programs today than ever before. The fundamental precept is that the very highest densities of energy storage would be found within the isomeric state of the nucleus, but the central problem of X-ray laser is to pump the gadget without heating the lattice and so destroying the Mssbauer and Bormann effect. This book deals with the most recent state of the photoexcitation of isome
Author: Edward C. Booth
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
Isomeric states of stable nuclei have been excited by photons and electrons via short-lived higher states. The isomer excitation experiments were undertaken in order to determine the relationship between the total inelastic electron scattering cross section and the radiative width, and to use the isomer excitation function to determine the energies widths, and angular momenta of accessible states. The following isotopes were studied: strontium-87, rhodium-103, cadmium-111, indium-113, indium-115, tin-117, barium-135, barium-137, platinum-195, and mercury-199.
Author: Simone Gargiulo
Publisher: Springer Nature
ISBN: 3031562623
Category :
Languages : en
Pages : 141
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Author: John Stewart Brownson
Publisher:
ISBN:
Category : Atoms
Languages : en
Pages : 148
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Book Description
![Excitation and Deexcitation of Selected Nuclear Isomers Through [gamma Sign] Reactions PDF](https://books.google.com/books/content/images/frontcover/yjtsNwAACAAJ?fife=w80-h100)
Author: James Jefferson Carroll
Publisher:
ISBN:
Category : Nuclear excitation
Languages : en
Pages : 306
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Author: Donald Strominger
Publisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 94
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Author: Ashok Kumar Jain
Publisher: Springer Nature
ISBN: 3030786757
Category : Science
Languages : en
Pages : 151
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Book Description
Nuclear isomers are the long-lived excited states of nuclei. Therefore, they constitute the meta-stable landscape of nuclei. The first isomer was probably identified as early as 1921. Since then, the number of isomers has been growing steadily picking up pace in recent times. Interest in nuclear isomers has grown in recent years for many reasons. The experimental capabilities to observe isomers have been expanding to cover a wider time scale. This has opened up new windows to observe and decipher the underlying nuclear structure and interactions. Further, the isomers are beginning to be seen as potential energy storage devices and nuclear clocks with a host of applications. Possible discovery of a gamma ray laser has also ignited many researches in this area. Isomers now cover the full nuclear landscape with structural peculiarities specific to each region of the nuclear chart. Exploring the nuclear isomers, therefore, provides a novel insight into the nuclear structure properties of that region. There could be many different reasons for the long lives of excited nuclear states, which lead to the classification of isomers. Isomers are broadly classified in to four classes: Spin isomers, shape isomers, fission isomers and K-isomers. Seniority isomers have also been identified which are often clubbed with the spin isomers. We discuss this classification and the underlying causes in detail. Many examples are considered to highlight the large variety of isomers. The range of half-lives covered by the isomers varies from billions of years to nano-seconds and even small. To understand this vast variation is a fascinating endeavor in itself. The angular momentum couplings, nuclear shapes, pairing etc. conspire together to give this vast range of half-lives. We go through these aspects in detail, highlighting the various selection rules at work. It is interesting that the nuclear shapes play an important role in many types of isomers. The spin isomers, which occur in spherical or, near-spherical nuclei, are generally confined to the magic numbers. Seniority isomers are largely found in semi-magic nuclei and should be explored in conjunction with the spin isomers. New developments in seniority and generalized seniority isomers are discussed in detail. As the nuclei deform; the nature of isomers changes. We take a close look into the decay properties of isomers in deformed nuclei, particularly the K isomers, the shape isomers and the fission isomers. While doing so, the theoretical and experimental developments of isomers are also addressed. A number of open questions are posed for possible new experiments and better understanding of the isomers.
Author: Carl B. Collins
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
This report focuses upon a breakthrough recently realized along the more complex direction toward the coherent pumping of a gamma-ray laser. The intent is to mix the quantum properties of long-lived nuclear states with those able to radiate freely. In this way the metastability of an isomeric state could be switched off. The critical experiment is to show that some laboratory level of coherent input power can affect the properties of a nuclear level. Reported here are the details of a series of experiments which clearly demonstrated that large levels of modulation of the phases of nuclear states can be obtained with relatively modest input powers. Now many more critical experiments become possible even along this more complex path toward a gamma-ray laser. Also reported here are the most recent advances we have made in the preparation of the thin film diamond materials. Efficacy of the unique laser plasma process we describe is so great that it already has become clear that applications will range far beyond the support of this gamma-ray laser project. Table of Contents: A Laser Plasma Source of Amorphic Diamond; and Observations Of Large Scale Nuclear Phase Modulation Effects.
Author: Roy Sidney Tilbury
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"In 1917 Soddy in discussing his ideas about atomic nuclei conceived the possibility of nuclei having the same charge and mass but being different in their radioactive behaviour. Hahn first discovered this phenomenon of nuclear isomerism in 1921. He found two beta activities of half-lives 1.15 minutes and 6.7 hours in the decay of thorium extracted from natural uranium, both of which activities reverted to uranium. We now know the decay chain to be as follows." --
