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Implantation and Release of Krypton with Copper Foils.

DE2001786814

Publication Date	2001
Personal Author	Oliver, B. M.; Eiden, G. C.; Ballou, N. E.
Page Count	26
Abstract	A system and a method providing high-efficiency implantation and release of Kr ions in metal foils have been developed. Implantation and release measurements were performed with a static mass spectrometer. Efficient implantation/retention of rare-gas isotopic ions in a target and their subsequent efficient volatilization from the target is the first of two central requirements for developing an ultrasensitive (10 parts per trillion) method to determine the isotopic content of rare gases. In a number of initial Kr ion implantation runs in Cu, with subsequent volatilization of the implanted Kr by heating, implantation/release efficiencies averaging about 52% were observed. This low value was determined to be due to only partial interception of the Kr ion beam by the target. With modifications to the target assembly, mass spectrometer, and target size, the efficiencies for implantation/release of Kr in Cu were raised to essentially 100%. These efficiencies meet the first requirement for developing this method.
Keywords	Krypton ions Implanation Mass spectrometery Metals Copper foils Release measurements
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Pacific Northwest National Lab., Richland, WA.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200302
Contract Number	AC06-76RLO1830

Implantation and Release of Krypton with Copper Foils.

Implantation and Release of Krypton with Copper Foils.
DE2001786814

Publication Date	2001
Personal Author	Oliver, B. M.; Eiden, G. C.; Ballou, N. E.
Page Count	26
Abstract	A system and a method providing high-efficiency implantation and release of Kr ions in metal foils have been developed. Implantation and release measurements were performed with a static mass spectrometer. Efficient implantation/retention of rare-gas isotopic ions in a target and their subsequent efficient volatilization from the target is the first of two central requirements for developing an ultrasensitive (10 parts per trillion) method to determine the isotopic content of rare gases. In a number of initial Kr ion implantation runs in Cu, with subsequent volatilization of the implanted Kr by heating, implantation/release efficiencies averaging about 52% were observed. This low value was determined to be due to only partial interception of the Kr ion beam by the target. With modifications to the target assembly, mass spectrometer, and target size, the efficiencies for implantation/release of Kr in Cu were raised to essentially 100%. These efficiencies meet the first requirement for developing this method.
Keywords	Krypton ions Implanation Mass spectrometery Metals Copper foils Release measurements
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Pacific Northwest National Lab., Richland, WA.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200302
Contract Number	AC06-76RLO1830