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Among these, AMS is the most promising technique at MALT. After the AMS-8 conference in 1999, the overall performance was greatly improved for 10Be-, 26Al- and 14C-AMS. For 10Be-AMS, the negative ion current was considerably increased by a new Cs-ionizer system and the replacement of the compound powder (Nb instead of Ag) for the BeO target. More than 3 μA current of BeO− ions can be extracted while it had been typically 1 μA before. For 26Al-AMS, by examining the sample ignition process, the negative ion gain was increased more than 200 nA (typically 100 nA before), which greatly improved the overall efficiency. For 14C-AMS, the 12C− current dependency problem has been moderated substantially by installing a fine controllable Cs oven and careful beam tuning. As a consequence, the precision is now better than 0.5% for modern carbon.  In addition, systems for 36Cl-AMS and 129I-AMS are currently being developed for future research programs at MALT."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383670319017223173","@type":"Researcher","foaf:name":[{"@value":"Hiroyuki Matsuzaki"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319017223172","@type":"Researcher","foaf:name":[{"@value":"Chuichiro Nakano"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319017223169","@type":"Researcher","foaf:name":[{"@value":"Hiroshi Yamashita"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319017223168","@type":"Researcher","foaf:name":[{"@value":"Yuji Maejima"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319017223174","@type":"Researcher","foaf:name":[{"@value":"Yosuke Miyairi"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319017223170","@type":"Researcher","foaf:name":[{"@value":"Sachi Wakasa"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319017223171","@type":"Researcher","foaf:name":[{"@value":"Kazuho Horiuchi"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"0168583X"}],"prism:publicationName":[{"@value":"Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2004-08","prism:volume":"223-224","prism:startingPage":"92","prism:endingPage":"99"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license","https://doi.org/10.15223/policy-017","https://doi.org/10.15223/policy-037","https://doi.org/10.15223/policy-012","https://doi.org/10.15223/policy-029","https://doi.org/10.15223/policy-004"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0168583X04005385?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0168583X04005385?httpAccept=text/plain"}],"createdAt":"2004-05-29","modifiedAt":"2025-07-30","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002216097833728","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"10Be measurements at MALT using reduced-size samples of bulk 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