Zobrazeno 1 - 10
of 47
pro vyhledávání: '"John C. Rucklidge"'
Autor:
X.-L. Zhao, Graham C. Wilson, William E. Kieser, A.E. Litherland, J.S.A. Krestow, John C. Rucklidge
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 259:194-198
The operating parameters for a high current caesium sputter source have been modified so that stable beams of anions can be obtained from natural non-conducting samples. This technique has been applied to the analysis of gold and platinum group eleme
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 189:387-393
This article illustrates the application of the proton-induced X-ray emission (PIXE) technique to detailed documentation of mineral assemblages, with emphasis on base–metal ores. Some of the investigations aided by the PIXE laboratory at Guelph sin
Publikováno v:
The Canadian Mineralogist. 40:473-479
La cabriite, dont la composition ideale est Pd 2 SnCu, n'a ete signalee qu'a cinq endroits au monde depuis sa decouverte dans le camp minier de Noril'sk-Talnakh, dans le nord-ouest de la Russie. Nous resumonsles decouvertes anterieures a propos de la
Autor:
William E. Kieser, J.P Doupé, Graham C. Wilson, J.S.A. Krestow, John C. Rucklidge, R.P. Beukens, A.E. Litherland, X.-L. Zhao, I. Tomski
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 172:206-210
Some of the continuing research into AMS at IsoTrace: neutral injection AMS, heavy element backgrounds, the analysis of non-conducting samples and low level 14C detection is described.
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 123:583-588
We have measured the abundances of seven precious metals in NiFe phases (kamacite and plessite) in six iron meteorites. These in-situ analyses, obtained by accelerator mass spectrometry (AMS) on small polished samples previously characterized by e
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 123:424-430
Accelerator Mass Spectrometry (AMS) has been applied to determine ReOs isochrons for the NiFe phases of a set of iron meteorites with emphasis on group IIA. The method requires no chemical sample treatment and permits in-situ analysis of the Re
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 123:579-582
A brief overview is provided of the uses of AMS in mineral analysis, emphasizing the selection of appropriate samples. Simple guidelines are given for judging the suitability of a set of samples (and the type of problem that they pose) for AMS, as op
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 123:414-423
We have applied an in-situ method of Accelerator Mass Spectrometry (AMS) to determine 107Ag and 109Ag compositions in several groups of iron meteorites and we have observed extreme variations of 107Ag and 109Ag counting rates from those samples as a
Autor:
A.E. Litherland, John C. Rucklidge, X.-L. Zhao, Linas R. Kilius, R.P. Beukens, William E. Kieser
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 123:5-9
The requirements for AMS solid sample ion sources: high stable currents, high efficiency, low memory effect, rapid sample switching and isobar separation are reviewed and the application of a variety of sources, using negative and neutral primary spu
Publikováno v:
Economic Geology. 90:255-270
The mineralogical residence of rare elements is of great academic and practical interest. In situ analytical methods employing largely nondestructive means (electron or proton bombardment) or sputtering by ion beams or laser ablation can be used to m