{"_buckets": {"deposit": "60e8cb69-f714-40c0-a86a-f46b1525429c"}, "_deposit": {"id": "12869", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "12869"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00012869", "sets": ["1318"]}, "author_link": ["83140", "83141", "83142", "83143"], "item_1615768549627": {"attribute_name": "出版タイプ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_970fb48d4fbd8a85", "subitem_version_type": "VoR"}]}, "item_9_alternative_title_19": {"attribute_name": "その他のタイトル", "attribute_value_mlt": [{"subitem_alternative_title": "A first step toward small-mass AMS radiocarbon analysis", "subitem_alternative_title_language": "en"}]}, "item_9_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2010-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "169", "bibliographicPageStart": "166", "bibliographicVolumeNumber": "21", "bibliographic_titles": [{"bibliographic_title": "名古屋大学加速器質量分析計業績報告書", "bibliographic_titleLang": "ja"}]}]}, "item_9_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "The AMS facility at Center for Chronological Research, Nagoya University, is performing ^\u003c14\u003eC analysis of various organic samples for many research projects in archaeology, earth sciences, environmental studies and so on. Recently, we are increasingly demanded for ^\u003c14\u003eC analysis of small-mass samples in these projects, and we have just started to establish a small-mass sample preparation system. In this first step, NIST Ox-II standard samples below 0.6 mgC, graphitized using our regular sample preparation protocol, were measured for ^\u003c14\u003eC. The small-mass samples produced low graphite yield and decreased ^\u003c12\u003eC^3+ beam currents. ^\u003c14\u003eC/^\u003c12\u003eC ratios were affected by the decrease in beam current intensity generated by samples \u003c0.3mgC. We investigated two different Fe/C ratios of ～2 and \u003e5 where amount of Fe catalyst is fixed to ～3mg in sample graphitization. Ion beam currents from targets produced with less catalyst were initially higher compared with those from targets with the usual amount of ～3mg Fe catalyst, but they did not last long and collapsed immediately as the sample was being sputtered by the Cs beam. Therefore, the graphite reduced on ～ 3mg of Fe, regardless or sample size, could give better ^\u003c14\u003eC/^\u003c12\u003eC result. For samples with \u003c0.3 mgC, isotopic fractionation between graphitization and/or measurement was observed. We should build a new reduction system suitable for small-mass samples.", "subitem_description_language": "en", "subitem_description_type": "Abstract"}, {"subitem_description": "1-1.5mgCの試料を調製するために使用している当センターの通常のシステムを用いて、0.2-0.6mgCの微量のシュウ酸標準試料を調製した場合に、どの程度の^\u003c14\u003eC測定精度･確度が得られるかどうかの検討を行った。微量試料の場合、通常の試料量の場合に比べてグラファイト率が低下し、^\u003c12\u003eC^3+ビーム強度がかなり低い結果となった。特に0.3mgC以下の試料においては、ほとんどビーム強度が得られず、^\u003c14\u003eC/^\u003c12\u003eC比は明らかに低い値を示した。Fe/C比を2-3に調製したターゲットは、Fe/C比が5以上のターゲットより、はじめはイオンビームが高いが、測定過程で急激に減少し、結果的に確度も精度も悪い結果となった。これらのことから、今後、試料量にかかわらず、Fe量は3mgにし、穴径の小さいターゲットを使用する必要があると考えられる。さらに、グラファイト化の際に生成する水を効率的にトラップし、高グラファイト率な\"微量飲料に特化したグラファイト化システム\"を構築する必要がある。", "subitem_description_language": "ja", "subitem_description_type": "Abstract"}]}, "item_9_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.18999/sumrua.21.166", "subitem_identifier_reg_type": "JaLC"}]}, "item_9_publisher_32": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "名古屋大学年代測定資料研究センター", "subitem_publisher_language": "ja"}]}, "item_9_select_15": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "open access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_abf2"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "南, 雅代", "creatorNameLang": "ja"}], "nameIdentifiers": [{"nameIdentifier": "83140", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "中村, 俊夫", "creatorNameLang": "ja"}], "nameIdentifiers": [{"nameIdentifier": "83141", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Minami, Masayo", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "83142", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Nakamura, Toshio", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "83143", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2018-02-20"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "21-25.pdf", "filesize": [{"value": "2.1 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_note", "mimetype": "application/pdf", "size": 2100000.0, "url": {"label": "21-25.pdf", "objectType": "fulltext", "url": "https://nagoya.repo.nii.ac.jp/record/12869/files/21-25.pdf"}, "version_id": "d5d1ab8f-715d-461b-b365-134bef76eccc"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "AMS", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Radiocarbon", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Graphitization", "subitem_subject_scheme": "Other"}, {"subitem_subject": "加速器質量分析法", "subitem_subject_scheme": "Other"}, {"subitem_subject": "放射性炭素", "subitem_subject_scheme": "Other"}, {"subitem_subject": "グラファイト化", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "少量炭素試料のAMS^\u003c14\u003eC分析に向けて", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "少量炭素試料のAMS^\u003c14\u003eC分析に向けて", "subitem_title_language": "ja"}]}, "item_type_id": "9", "owner": "1", "path": ["1318"], "permalink_uri": "https://doi.org/10.18999/sumrua.21.166", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2011-05-11"}, "publish_date": "2011-05-11", "publish_status": "0", "recid": "12869", "relation": {}, "relation_version_is_last": true, "title": ["少量炭素試料のAMS^\u003c14\u003eC分析に向けて"], "weko_shared_id": -1}