A Study of Actinide De-excitation Through Neutron Emission from the Deuteron Induced Fission of 238U PDF Download
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Author: Peter Hayden Sprunger
Publisher:
ISBN:
Category : Nuclear fission
Languages : en
Pages : 320
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Book Description
The process of de-excitation of the actinides is a very important question in both pure and applied science. In this dissertation the process was studied using the neutrons emitted in coincidence with fission induced by the bombardment of 238U with 14.85 MeV deuterons. Neutrons can be emitted at multiple stages during the de-excitation process, with each stage producing its own unique neutron spectrum. The neutron spectrum in the lab frame is broken down into its constituent components using kinematic corrections to place them in their own reference frame. It was found that 5.270 [plus or minus] 0.067 prompt neutrons are emitted per fission with an average source temperature of 1.094 [plus or minus] 0.011. In addition to the prompt neutrons spectrum, a pre-equilibrium component of 0.458 [plus or minus] 0.023 neutrons per fission was observed coming from a source with a temperature of 3.15 [plus or minus] 0.25 MeV. Unfortunately, the desired compound nucleus components were not resolveable because the magnitudes of the components were smaller than the magnitudes of the errors on the data.
Author: Peter Hayden Sprunger
Publisher:
ISBN:
Category : Nuclear fission
Languages : en
Pages : 320
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Book Description
The process of de-excitation of the actinides is a very important question in both pure and applied science. In this dissertation the process was studied using the neutrons emitted in coincidence with fission induced by the bombardment of 238U with 14.85 MeV deuterons. Neutrons can be emitted at multiple stages during the de-excitation process, with each stage producing its own unique neutron spectrum. The neutron spectrum in the lab frame is broken down into its constituent components using kinematic corrections to place them in their own reference frame. It was found that 5.270 [plus or minus] 0.067 prompt neutrons are emitted per fission with an average source temperature of 1.094 [plus or minus] 0.011. In addition to the prompt neutrons spectrum, a pre-equilibrium component of 0.458 [plus or minus] 0.023 neutrons per fission was observed coming from a source with a temperature of 3.15 [plus or minus] 0.25 MeV. Unfortunately, the desired compound nucleus components were not resolveable because the magnitudes of the components were smaller than the magnitudes of the errors on the data.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 782
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Book Description
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 676
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Book Description
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1080
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Book Description
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1422
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Author: Norman M. Edelstein
Publisher: Elsevier
ISBN: 148319051X
Category : Science
Languages : en
Pages : 621
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Book Description
Actinides in Perspective presents in proceedings of the Actinides-1981 Conference held in Pacific Grove, California, USA on September 10-15, 1981. The book contains papers on the different aspect of the physics and chemistry of the actinides. The text includes papers on the history of the discovery of the transplutonium elements; the photoemission techniques; and the neutron scattering studies of the actinides. The new elements in the transfermium region; the isotope identification in the transfermium region by ?-? correlation after in-flight-separation; and the fission properties of the actinides are also considered. The book further tackles papers on the status of superheavy element research; the single crystal preparation of actinides and actinide compounds; and the preparation of transplutonium metals and compounds, protactinium metal and compounds, and actinide metals. The text also includes papers on the complex oxide systems of the actinides; thermodynamic properties of the actinides; and the chemical and physicochemical properties of actinide organometallic compounds.
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 180
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Book Description
Author: Arthur J. Freeman
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 602
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Book Description
In the last 20 years actinide research has presented unique challenges both for experimentalists and theorists. Their uniqueness stems not only from their nuclear properties, which since the early 1940's have led to their important role in nuclear energy and nuclear technology, but also from their unusual chemical and physical properties which have added new excitement and discoveries to both these disciplines. Containing comprehensive, critical, broad and up to date reviews covering both the physics and chemistry of these exotic elements the Handbook is primarily directed at and a must for those active in the field. It will also be invaluable to those about to enter or marginally interested in this field.
Author: Christopher J. Francy
Publisher:
ISBN:
Category : Actinide elements
Languages : en
Pages : 110
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Book Description
The detection of illicit weapons-grade nuclear material is a significant technical challenge receiving a great deal of attention in the nuclear community. A proposed solution is to actively bombard the material under investigation with neutrons, populating nuclear isomers in any potential fissile material. These isomers decay quickly, releasing gamma rays that have a higher energy than those from natural radioactive decay, significantly increasing the probability of detection. This research covers an experiment related to the Actinide Isomer Identification project (AID). The AID project is the investigation of an active interrogation technique that utilizes nuclear isomer production, with the goal of assisting in the interdiction of illicit nuclear materials. In an attempt to find and characterize isomers belonging to 235U and its fission fragments, a 232Th target was bombarded with a monoenergetic 6Li ion beam, operating at 45 MeV. The experimental data was gathered using an array of silicon, high purity germanium (HPGe) and bismuth germanate (BGO) radiation detectors. The silicon detectors were used to detect reaction products, which were used to start a clock to time gamma ray interactions in the HPGe detectors. The BGO detectors were used to filter out Compton scatter events and background signals. The data was processed with the spectroscopic software gf3m to identify the signals originating from isomers. The analysis led to the identification and characterization of 19 isomers, of which several were recognized as useful to the goals of the AID project.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 632
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Book Description
Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
