A new AMS facility at the JNC Tono Geoscience Center, Japan

A new AMS facility (NEC 15SDH-2) based on a 5 MV tandem accelerator has been installed at the Japan Nuclear Cycle Development Institute (JNC) Tono Geoscience Center in March 1997. It has two cesium sputter negative ion sources (for solid and gas samples) which are connected to a fast sequential inje...

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Bibliographic Details
Published inNuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 172; no. 1; pp. 8 - 12
Main Authors Xu, Sheng, Ito, Shigeru, Iwatsuki, Teruki, Abe, Masahito, Watanabe, Masato
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2000
Subjects
AMS
JNC
Performance test
Radiocarbon
Radiocarbon
AMS
91.35.N
07.75
41.75
JNC
Performance test
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Summary:A new AMS facility (NEC 15SDH-2) based on a 5 MV tandem accelerator has been installed at the Japan Nuclear Cycle Development Institute (JNC) Tono Geoscience Center in March 1997. It has two cesium sputter negative ion sources (for solid and gas samples) which are connected to a fast sequential injection beam line. A number of performance tests have been done on the MC-SNICS solid source for radiocarbon. Precision measurements with modern samples have shown that a precision below 0.5% is feasible on a routine basis. The 14C background of the machine and the chemistry blank are 0.04 and 0.10 pMC respectively, indicating a 14C dating limit of 56,000 yr BP. The normalized JNC 14C values for IAEA standard materials (C-2 to C-8) agree well with the nominal values. Since October 1998, the MC-SNICS solid source is used for routine radiocarbon dating. Preliminary results of performance tests of the MGF-SNICS gas source are reported, too.
ISSN:0168-583X
1872-9584
DOI:10.1016/S0168-583X(00)00379-7