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  1. 原著論文

Abundances of Uranium and Thorium Elements in Earth Estimated by Geoneutrino Spectroscopy

https://repo.qst.go.jp/records/2000170
https://repo.qst.go.jp/records/2000170
dec50068-42e9-4cb7-be3a-027216b79039
アイテムタイプ 学術雑誌論文 / Journal Article(1)
公開日 2023-07-03
タイトル
タイトル Abundances of Uranium and Thorium Elements in Earth Estimated by Geoneutrino Spectroscopy
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
著者 S. Abe

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S. Abe

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S. Asami

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S. Asami

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M. Eizuka

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M. Eizuka

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S. Futagi

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S. Futagi

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A. Gando

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A. Gando

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Y. Gando

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Y. Gando

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T. Gima

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T. Gima

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A. Goto

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A. Goto

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T. Hachiya

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T. Hachiya

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K. Hata

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K. Hata

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K. Hosokawa

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K. Hosokawa

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K. Ichimura

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K. Ichimura

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S. Ieki

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S. Ieki

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H. Ikeda

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H. Ikeda

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K. Inoue

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K. Inoue

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K. Ishidoshiro

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K. Ishidoshiro

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Y. Kamei

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Y. Kamei

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N. Kawada

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N. Kawada

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Y. Kishimoto

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Y. Kishimoto

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M. Koga

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M. Koga

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M. Kurasawa

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M. Kurasawa

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N. Maemura

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N. Maemura

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T. Mitsui

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H. Miyake

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T. Nakahata

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K. Nakamura

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K. Nakamura

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R. Nakamura

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H. Ozaki

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T. Sakai

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H. Sambonsugi

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抄録
内容記述タイプ Abstract
内容記述 The decay of the primordial isotopes 238U, 235U, 232Th, and 40K has contributed to the terrestrial heat budget throughout the Earth's history. Hence, the individual abundance of those isotopes are key parameters in reconstructing contemporary Earth models. The geoneutrinos produced by the radioactive decays of uranium and thorium have been observed with the Kamioka Liquid-Scintillator Antineutrino Detector (KamLAND). Those measurements have been improved with more than 18-year observation time, and improvement in detector background levels mainly with an 8-year nearly reactor-free period, which now permit spectroscopy with geoneutrinos. Our results yield the first constraint on both uranium and thorium heat contributions. The KamLAND result is consistent with geochemical estimations based on elemental abundances of chondritic meteorites and mantle peridotites. The High-Q model is disfavored at 99.76% C.L. and a fully radiogenic model is excluded at 5.2σ assuming a homogeneous heat producing element distribution in the mantle.
書誌情報 Geophysical Research Letters

巻 49, 号 16, p. e2022GL099566, 発行日 2022-08
出版者
出版者 John Wiley & Sons
ISSN
収録物識別子タイプ ISSN
収録物識別子 1944-8007
DOI
識別子タイプ DOI
関連識別子 10.1029/2022GL099566
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