{"created":"2023-07-27T06:58:43.268172+00:00","id":57671,"links":{},"metadata":{"_buckets":{"deposit":"2de62f00-a488-44d4-9a45-ea52b348377c"},"_deposit":{"created_by":18,"id":"57671","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"57671"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00057671","sets":["2812:2813:2834"]},"author_link":["15005","81211"],"item_9_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2001-10-22","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"2p.","bibliographicVolumeNumber":"1998 – 1999","bibliographic_titles":[{"bibliographic_title":"平成11(1999)年度 科学研究費補助金 基盤研究(B) 研究成果報告書概要"},{"bibliographic_title":"1999 Fiscal Year Final Research Report Summary","bibliographic_titleLang":"en"}]}]},"item_9_creator_33":{"attribute_name":"著者別表示","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{}],"nameIdentifiers":[{},{},{}]}]},"item_9_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"縄文期の貝塚で大量の獣骨が発掘されているそれらの年代を求める簡便な方法として非破壊γ線計測によるウラン系列核種の非平衡年代測定(230Th/234U法の変法としての226Ra/238U法の摘要の可能性を検討した。測定には水深換算270mの地下空間に設置した地上測定より2桁高感度の極低バックグラウンド井戸型Ge検出器を使用した。獣骨の放射性核種取込みパターンは埋没環境で異なること、すなわち、鳥浜貝塚のように海水の関与が大きい遺跡では、ウランよりもラジウム濃度が高いこと、北海道戸井遺跡及び千葉県殿台遺跡では、ウランのみの初期取り込みを仮定して年代算出が可能なことを見い出した。鳥浜貝塚試料は半減期の短い228Raが存在することから、発掘時も埋没環境とラジウムの交換が存在することを示唆しているが、トリウム同位体の取込みはほとんどないことをアルファ線測定により確認した。非破壊年代あるいはアルファ線計測による年代は考古学から推定された年代より約1000年古くなるが、その原因は初期の取り込みによる可能性が高い。化石骨の非破壊γ線測定を単独の方法として確率することは出来なかったが、他法を適用する前の迅速な予備測定としての有効性を確認した。\n非破壊測定によるウランおよびトリウム系列核種の非平衡は埋没環境についての情報を得る有力な手段として適用するのが最も有効と考える。なお、表面電離型質量分析計による234U/238Uウラン同位体比の測定は実試料には適用できなかったが、今後に繋がる基礎データを得た。","subitem_description_type":"Abstract"},{"subitem_description":"In order to estimate ages of animal bones excavated from shell mounds of Jyomon-era, non-destructive dating method using Ra-226/U-238 activity ratio has been examined as a new and simple dating technique. Gamma-ray measurements of animal bones were performed using extremely low background well type Ge detector set in underground laboratory (270 mwe of depth) in a tunnel of former Ogoya Copper Mine. It was found that there are three pattern of in-situ incorporation of uranium series nuclides ; (1) rather high amount of radium relative to uranium is incorporated during degradation stage of bone samples (Torihama shell mound Fukui Pref.), (2) rather high amount of uranium is selectively incorporated into bone sample (Tonodai shell mound, Chiba Pref.) and (3) small amount of uranium without radium is incorporated in bone sample in early stage (Toi shell mound, Hokkaido).\nAge of bone samples in case (2) and (3) can be calculated from Ra-226/U-238 activity ratios. Torihama sample could not be dated by non-destructive method because the concentration of Ra-226 is higher than parent uranium, therefore, age of Torihama sample was measured by alpha spectrometry. Present methods was found to give c.a. 1000 year older than archaeological ages. Even if non-destructive dating method cannot be applied to bone samples, gamma spectrometry was found to be very useful to get information on environmental circumstances of Jyomon-era.","subitem_description_type":"Abstract"}]},"item_9_description_22":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"研究課題/領域番号:10480025, 研究期間(年度):1998 – 1999","subitem_description_type":"Other"},{"subitem_description":"出典：「極低レベルγ線計測による縄文期獣骨の年代測定」研究成果報告書　課題番号10480025\n（KAKEN：科学研究費助成事業データベース（国立情報学研究所））\n（https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-10480025/104800251999kenkyu_seika_hokoku_gaiyo/）を加工して作成","subitem_description_type":"Other"}]},"item_9_description_5":{"attribute_name":"提供者所属","attribute_value_mlt":[{"subitem_description":"金沢大学理学部","subitem_description_type":"Other"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24517/00063941","subitem_identifier_reg_type":"JaLC"}]},"item_9_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/ja/search/?kw=00110601"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/ja/search/?kw=00110601","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-10480025/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-10480025/","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-10480025/104800251999kenkyu_seika_hokoku_gaiyo/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-10480025/104800251999kenkyu_seika_hokoku_gaiyo/","subitem_relation_type_select":"URI"}}]},"item_9_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2021-09-13"}],"displaytype":"detail","filename":"SC-PR-KOMURA-K-kaken 2001-2p.pdf","filesize":[{"value":"89.1 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"SC-PR-KOMURA-K-kaken 2001-2p.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/57671/files/SC-PR-KOMURA-K-kaken 2001-2p.pdf"},"version_id":"a78fd2c1-2917-40f9-a405-0d3e9cc84c91"}]},"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":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"極低レベルγ線計測による縄文期獣骨の年代測定","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"極低レベルγ線計測による縄文期獣骨の年代測定"},{"subitem_title":"Radioactive dating of animal bones of Jyomon-era by extremely low-level gamma-ray spectrometry.","subitem_title_language":"en"}]},"item_type_id":"9","owner":"18","path":["2834"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-09-13"},"publish_date":"2021-09-13","publish_status":"0","recid":"57671","relation_version_is_last":true,"title":["極低レベルγ線計測による縄文期獣骨の年代測定"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-07-27T14:55:36.682758+00:00"}