Author: W. S. KoskiPublisher:
ISBN:
Category : Nuclear isomers
Languages : en
Pages : 6
Book Description
Separation of Nuclear Isomers
Author: W. S. KoskiPublisher:
ISBN:
Category : Nuclear isomers
Languages : en
Pages : 6
Book Description
Nuclear Isomer Separation
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Pure specimens of nuclear isomers are required for gamma-ray lasers. Atoms containing isomeric nuclei of 197Hg are selectively photoionized. The isomers were produced by the 197Au(d,2n)197Hg reaction and distilled. Three pulsed dye lasers were used to selectively ionize mercury atoms by doubly resonant three-step photoionization. Other isomer separation techniques and their limitations are discussed. 7 refs., 4 figs.
1. The Mechanism of the Chemical Separation of Nuclear Isomers
Author: Gerhart FriedlaenderPublisher:
ISBN:
Category : Isomerism
Languages : en
Pages :
Book Description
The Separation of the Nuclear Isomers of Tellurium Mercury and Tin
Author: A Continuous Extraction System for the Separation of Nuclear Isomers of Tellurium
Author: John Edward EsterlNuclear Isomers
Author: Ashok Kumar JainPublisher: Springer Nature
ISBN: 3030786757
Category : Science
Languages : en
Pages : 151
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.
Proposed Separation of Isomeric /sup 197m/Hg
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We explore the feasibility of separating 1014-atom quantities of the nuclear isomer /sup 197m/Hg, using a three-step resonance ionization technique. It should be straightforward to achieve the separation in times of the order of 100 seconds, and there is a possibility of attaining separation times well under 1 second, as would be required for direct use in a gamma-ray laser.
Multiple Nuclear Isomerism
Author: Nuclear Science Abstracts
Author: Medical Isotope Production Without Highly Enriched Uranium
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309130395
Category : Medical
Languages : en
Pages : 220
Book Description
This book is the product of a congressionally mandated study to examine the feasibility of eliminating the use of highly enriched uranium (HEU2) in reactor fuel, reactor targets, and medical isotope production facilities. The book focuses primarily on the use of HEU for the production of the medical isotope molybdenum-99 (Mo-99), whose decay product, technetium-99m3 (Tc-99m), is used in the majority of medical diagnostic imaging procedures in the United States, and secondarily on the use of HEU for research and test reactor fuel. The supply of Mo-99 in the U.S. is likely to be unreliable until newer production sources come online. The reliability of the current supply system is an important medical isotope concern; this book concludes that achieving a cost difference of less than 10 percent in facilities that will need to convert from HEU- to LEU-based Mo-99 production is much less important than is reliability of supply.