A fast effusive-flow vapor-transport system for ISOL-based radioactive ion beam facilities
✍ Scribed by G.D. Alton; Y. Zhang
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 397 KB
- Volume
- 539
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
In order to generate useful beam intensities of short-lived radioactive isotopes for nuclear and nuclear-astrophysics research at ISOL-based radioactive ion beam facilities, delay times associated with diffusion release from target materials and effusive-flow transport from production targets to ion sources must be reduced to as low as practically achievable levels. A fast vapor-transport system has been conceived that reduces effusive-flow times from target to ion source by42 orders of magnitude over those of conventional transport systems used at CERN-ISOLDE and the Holifield Radioactive Ion Beam Facility. For target material thicknesses of $1 mm, the new system permits the generation of useful RIB intensities of species with lifetimes of a few tens of milliseconds to a few seconds and target/ species combinations with diffusion coefficients in the range, 10 À8 XD(cm 2 /s)X10 À10 .