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Total Pages | : 3 |
Release | : 1994 |
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Download Selection of RIB Targets Using Ion Implantation Book in PDF, ePub and Kindle
Experimental studies are under way at the Oak Ridge National Laboratory (ORNL) which are designed to measure the time evolution, ionization efficiencies, and release efficiencies of implanted elements diffused from refractory target materials which are candidates for forming radioactive ion beams (RIBs) at the Holifield Radioactive Ion Beam Facility (HRIBF). The diffusion coefficients are derived by comparing experimental data with numerical solutions to a one-dimensional form of Fick's second law for ion implanted distributions. In this report, we describe the experimental arrangement and provide time release data and diffusion coefficients for releasing ion implanted Cl from Zr5Si3 and 75As, 79Br, and 78Se from Zr5Ge3.
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Total Pages | : 24 |
Release | : 1995 |
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Download Selection of RIB Targets Using Ion Implantation at the Holifield Radioactive Ion Beam Facility Book in PDF, ePub and Kindle
Among several major challenges posed by generating and accelerating adequate intensities of RIBs, selection of the most appropriate target material is perhaps the most difficult because of the requisite fast and selective thermal release of minute amounts of the short-lived product atoms from the ISOL target in the presence of bulk amounts of target material. Experimental studies are under way at the Oak Ridge National Laboratory (ORNL) which are designed to measure the time evolution of implanted elements diffused from refractory target materials which are candidates for forming radioactive ion beams (RIBs) at the Holifield Radioactive Ion Beam Facility (HRIBF). The diffusion coefficients are derived by comparing experimental data with numerical solutions to a one-dimensional form of Fick's second law for ion implanted distributions. In this report, we describe the experimental arrangement, experimental procedures, and provide time release data and diffusion coefficients for releasing ion implanted 37Cl from Zr5Si3 and 75As, 79Br, and 78Se from Zr5Ge3 and estimates of the diffusion coefficients for35Cl, 63Cu, 65Cu, 69Ga and 71Ga diffused from BN; 35Cl, 63Cu, 65Cu, 69Ga, 75As, and 78Se diffused from C; 35Cl, 68Cu, 69Ga, 75As, and 78Se diffused from Ta.
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Total Pages | : 702 |
Release | : 1995 |
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Total Pages | : 508 |
Release | : 1994-12 |
Genre | : Power resources |
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Download Energy Research Abstracts Book in PDF, ePub and Kindle
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Total Pages | : 38 |
Release | : 1995 |
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Download Selection of Targets and Ion Sources for RIB Generation at the Holifield Radioactive Ion Beam Facility Book in PDF, ePub and Kindle
In this report, the authors describe the performance characteristics for a selected number of target ion sources that will be employed for initial use at the Holifield Radioactive Ion Beam Facility (HRIBF) as well as prototype ion sources that show promise for future use for RIB applications. A brief review of present efforts to select target materials and to design composite target matrix/heat-sink systems that simultaneously incorporate the short diffusion lengths, high permeabilities, and controllable temperatures required to effect fast and efficient diffusion release of the short-lived species is also given.
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Total Pages | : 592 |
Release | : 1996 |
Genre | : Science |
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Download Government Reports Announcements & Index Book in PDF, ePub and Kindle
Author | : Themis Paradellis |
Publisher | : SPIE-International Society for Optical Engineering |
Total Pages | : 558 |
Release | : 1995 |
Genre | : Science |
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Total Pages | : 730 |
Release | : 1996 |
Genre | : Nuclear energy |
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Author | : Cyriel Wagemans |
Publisher | : World Scientific |
Total Pages | : 332 |
Release | : 2010-10-11 |
Genre | : Science |
ISBN | : 9814464082 |
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This conference is the seventh in a series of topical meetings dealing with the nuclear fission process, mainly at low excitation energy. During these meetings, actual topics are discussed by a group of experts. These proceedings give an overview of the topics treated, and permit a rapid overview of the current activities in the field.
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Total Pages | : 55 |
Release | : 1995 |
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Download Targets for Ion Sources for RIB Generation at the Holifield Radioactive Ion Beam Facility Book in PDF, ePub and Kindle
The Holifield Radioactive Ion Beam Facility (HRIBF), now under construction at the Oak Ridge National Laboratory, is based on the use of the well-known on-line isotope separator (ISOL) technique in which radioactive nuclei are produced by fusion type reactions in selectively chosen target materials by high-energy proton, deuteron, or He ion beams from the Oak Ridge Isochronous Cyclotron (ORIC). Among several major challenges posed by generating and accelerating adequate intensities of radioactive ion beams (RIBs), selection of the most appropriate target material for production of the species of interest is, perhaps, the most difficult. In this report, we briefly review present efforts to select target materials and to design composite target matrix/heat-sink systems that simultaneously incorporate the short diffusion lengths, high permeabilities, and controllable temperatures required to effect maximum diffusion release rates of the short-lived species that can be realized at the temperature limits of specific target materials. We also describe the performance characteristics for a selected number of target ion sources that will be employed for initial use at the HRIBF as well as prototype ion sources that show promise for future use for RIB applications.