{"_buckets": {"deposit": "53a768cf-241d-4ee9-97f8-7ba4fea3b734"}, "_deposit": {"id": "11318", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11318"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011318", "sets": ["1220"]}, "item_9_alternative_title_19": {"attribute_name": "その他の言語のタイトル", "attribute_value_mlt": [{"subitem_alternative_title": "A preparation method of graphite target by reduction of CO_2 with H_2 for AMS \u003c14\u003e^C measurement"}]}, "item_9_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1991-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "122", "bibliographicPageStart": "113", "bibliographicVolumeNumber": "2", "bibliographic_titles": [{"bibliographic_title": "名古屋大学加速器質量分析計業績報告書"}]}]}, "item_9_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "Carbon-14 has been used extensively as a tracer in environmental science and a dating method for geological and archaeological samples. The recent developement in ^\u003c14\u003eC measurements by accelerator mass spectrome-tory (AMS) has been reduced amounts of carbon and its application has been expanded largely to many new fields. However, several difficulties have been remained in dealing with small amounts of carbon. We have improved the H_2 reduction method with iron powder (Vorgel, et al., 1984,1987) and developed a simple and reliable method of graphite target preparation applicable to samples of sub-milligram carbon. The targets have intense and long-lived ion beams and extremely low ^\u003c14\u003eC background and have allowed us to achieve : (1) For samples in the range of 0.2-3mg carbon, ^\u003c14\u003eC background of targets from coal is 0.11% modern on average (equivalent age 55kyr) and do not vary with the amount of carbon. (2) The isotopic fractionation during the preparation is within 3〓. (3) The beam intensity of produced targets is typically 75% of that of natural graphite. The required time to accumulate 10,000 counts of ^\u003c14\u003eC for a modern sample is 10-15 minutes. (4) Some samples for duration tests of beam currents yield stable currents that decrease gradually and extreamly stable isotope ratio (^\u003c14\u003eC/^\u003c13\u003eC). The AMS ^\u003c14\u003eC measurements for milligram to sub-milligram carbon are made possible with high accuracies.", "subitem_description_type": "Abstract"}]}, "item_9_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.18999/sumrua.2.113", "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 天然放射性元素測定小委員会"}]}, "item_9_relation_43": {"attribute_name": "異版である", "attribute_value_mlt": [{"subitem_relation_type": "isVersionOf", "subitem_relation_type_id": {"subitem_relation_type_id_text": "http://ci.nii.ac.jp/naid/110000475778/", "subitem_relation_type_select": "URI"}}]}, "item_9_rights_12": {"attribute_name": "権利", "attribute_value_mlt": [{"subitem_rights": "名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会"}, {"subitem_rights": "本文データは学協会の許諾に基づきCiNiiから複製したものである"}]}, "item_9_select_15": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_9_text_14": {"attribute_name": "フォーマット", "attribute_value_mlt": [{"subitem_text_value": "application/pdf"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "北川, 浩之"}], "nameIdentifiers": [{"nameIdentifier": "79464", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Kitagawa, Hiroyuki"}], "nameIdentifiers": [{"nameIdentifier": "79465", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "増澤, 敏行"}], "nameIdentifiers": [{"nameIdentifier": "79466", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Masuzawa, Toshiyuki"}], "nameIdentifiers": [{"nameIdentifier": "79467", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "松本, 英二"}], "nameIdentifiers": [{"nameIdentifier": "79468", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Matsumoto, Eiji"}], "nameIdentifiers": [{"nameIdentifier": "79469", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "山口, 和典"}], "nameIdentifiers": [{"nameIdentifier": "79470", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Yamaguchi, Kazunori"}], "nameIdentifiers": [{"nameIdentifier": "79471", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "中村, 俊夫"}], "nameIdentifiers": [{"nameIdentifier": "79472", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Nakamura, Toshio"}], "nameIdentifiers": [{"nameIdentifier": "79473", "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": "KJ00000187509.pdf", "filesize": [{"value": "462.3 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 462300.0, "url": {"label": "KJ00000187509.pdf", "url": "https://nagoya.repo.nii.ac.jp/record/11318/files/KJ00000187509.pdf"}, "version_id": "c2a9a9b2-d0c0-423d-b36f-17a3532c3b0e"}]}, "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": "水素還元法によるAMS法炭素-14測定のためのグラファイトターゲットの作成法", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "水素還元法によるAMS法炭素-14測定のためのグラファイトターゲットの作成法"}]}, "item_type_id": "9", "owner": "1", "path": ["1220"], "permalink_uri": "https://doi.org/10.18999/sumrua.2.113", "pubdate": {"attribute_name": "公開日", "attribute_value": "2010-04-26"}, "publish_date": "2010-04-26", "publish_status": "0", "recid": "11318", "relation": {}, "relation_version_is_last": true, "title": ["水素還元法によるAMS法炭素-14測定のためのグラファイトターゲットの作成法"], "weko_shared_id": null}