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紀元前4世紀、宮崎クスノキ材年輪中の放射性炭素濃度の測定(第 19回名古屋大学年代測定総合研究センターシンポジウム平成18(2006)年度報告,第2部)
https://doi.org/10.18999/sumrua.18.105
52481823-19fd-48ed-8c62-0b5b43a53449
| 名前 / ファイル | ライセンス | アクション | |
|---|---|---|---|
KJ00005461885.pdf (453.9 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-06-10 | |||||
| タイトル | ||||||
| タイトル | 紀元前4世紀、宮崎クスノキ材年輪中の放射性炭素濃度の測定(第 19回名古屋大学年代測定総合研究センターシンポジウム平成18(2006)年度報告,第2部) | |||||
| その他のタイトル | ||||||
| その他のタイトル | Measurement of ^<14>C content in 4^<th> century BC Japanese camphor tree rings(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part 2) | |||||
| 著者 |
永冶, 健太朗
× 永冶, 健太朗× Nagaya, Kentaro× 北澤, 恭平× Kitazawa, Kyohe× 増田, 公明× Masuda, Kimiaki× 村木, 綏× Muraki, Yasushi× 宮原, ひろ子× Miyahara, Hiroko× 中村, 俊夫× Nakamura, Toshio |
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| 権利 | ||||||
| 権利情報 | 名古屋大学年代測定資料研究センター | |||||
| 権利 | ||||||
| 権利情報 | 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 | |||||
| 抄録 | ||||||
| 内容記述 | Sunspot numbers, which reflect solar activity, have presented clear 11-year periodicity since the beginning of the 18^<th> century. But in the period around 1645 to 1715 AD sunspots were nearly absent, so we can not know if 11-year periodicity of solar activity was continued or not during the period by the records of sunspot numbers. This period is called as the Maunder Minimum. Radiocarbon ^<14>C, which is one of cosmogenic radioisotopes, is a good indicator of solar activity too. By determining the concentration of the ^<14>C in each tree ring, we can get information on the change of solar activity in grand solar minima like Maunder Minimum. Variation of decadal ^<14>C content measured by Stuiver et al. shows that grand solar minima, a period solar activity was extremely weak for decades or more, occurred several times in the last 10000 years. Stuiver classifies grand solar minima into 3 categories depending on the length of their durations. The Maunder type minima have a period of 〜80 yr and the Sporer type minima last 〜40 yr longer. We have already obtained the records of ^<14>C content in Japanese cedar tree rings of 1413 to 1745 AD including the Spoerer Minimum and the Maunder Minimum with annual time resolution. As a result of frequency analysis of these ^<14>C records, we found that the Sun maintained its periodic activity even if during the minima. We found, however, the cycle length of the "11-year cycle" during the Maunder Minimum was around 14 years and that during the Spoerer Minimum was around 11 years. This suggests that a pattern of the "11-year cycle" cycle length variation depends on a type of minima. In order to verify this hypothesis, we have measured ^<14>C content in Japanese camphor tree rings of 431 to 323 BC. The age, when this tree was growing has been determined by comparing ^<14>C records measured by us with world typical ^<14>C records called as the IntCal04. The period 431 to 323 BC covers start of ^<14>C increase to around its peak in the 4^<th> century BC solar minimum. We will measure and analyze the ^<14>C content during the last half of the 4^<th> century BC solar minimum and find out the actual cycle length of the "11-year cycle". | |||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | ||||||
| 内容記述 | 第19回名古屋大学年代測定総合研究センターシンポジウム平成18(2006)年度報告<第2部> Proceedings of the 19th symposiumon on Chronological Studies at the Nagoya University Center for Chronological Research\ in 2006 日時:平成19 (2007)年1月15日(月)～17日(水) 会場:名古屋大学シンポジオン Date:January15th-17th, 2007 Venue:Nagoya Uhiversity Symposion Hall |
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| 内容記述タイプ | Other | |||||
| 出版者 | ||||||
| 出版者 | 名古屋大学年代測定資料研究センター | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/sumrua.18.105 | |||||
| ID登録タイプ | JaLC | |||||
| 関連情報 | ||||||
| 関連タイプ | isVersionOf | |||||
| 関連識別子 | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://ci.nii.ac.jp/naid/110007150991/ | |||||
| 書誌情報 |
名古屋大学加速器質量分析計業績報告書 巻 18, p. 105-111, 発行日 2007-03 |
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| フォーマット | ||||||
| application/pdf | ||||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
