Progress on multi-nuclide AMS of JAEA-AMS-TONO

Saito‐Kokubu, Yoko; Matsubara, Atsushi; Miyake, Masakazu; Nishizawa, A.; Ohwaki, Y.; Nishio, Toshiyuki; Sanada, Katsuki; Hanaki, T.

doi:10.1016/j.nimb.2015.04.071

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…The charcoal fragments were cleaned chemically with acid-alkali-acid (AAA) treatment, and combusted to CO 2 . The CO 2 produced was purified cryogenically and then converted catalytically to graphite (Kitagawa et al 1993), and measured by the NEC 15SDH-2 AMS system (JAEA-AMS-TONO) at the Tono Geoscience Center, JAEA (Saito-Kokubu et al 2015). All three carbon isotopes in both samples and an NIST oxalic acid standard (HOxII) were measured with the system.…”

Section: Methodsmentioning

confidence: 99%

AMS Radiocarbon Dates of Pyroclastic-Flow Deposits on the Southern Slope of the Kuju Volcanic Group, Kyushu, Japan

et al. 2016

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The Kuju volcanic group, located in central Kyushu, Japan, consists of small stratovolcanoes and lava domes. To refine the eruptive history of the group, we conducted accelerator mass spectrometry (AMS) radiocarbon dating of charcoal fragments from three pyroclastic-flow (PF) deposits on the southern slope. The obtained 14C dates are consistent with the geomorphology, stratigraphy, and thermoluminescence (TL) ages. The Handa PF deposits, which are products of the largest eruption of the group, were dated to ~53.5 ka BP. The Shirani and Muro PF deposits, which are block-and-ash flows, were dated to 44 to >50 cal ka BP and 35–39 cal ka BP, respectively. These ages can be correlated with TL ages for lava domes. This study demonstrates that the lava domes and associated PF deposits formed after the Handa eruption.

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Section: Methodsmentioning

confidence: 99%

AMS Radiocarbon Dates of Pyroclastic-Flow Deposits on the Southern Slope of the Kuju Volcanic Group, Kyushu, Japan

et al. 2016

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“…The 14 C age of the SOC fraction was determined by an accelerator mass spectrometer at Tono Geoscience Center, Japan Atomic Energy Agency (Saito-Kokubu et al, 2015). The SOC sample was wrapped in a tin capsule and combusted at 920°C in an elemental analyzer (vario MICRO cube, Elementar).…”

Section: C Datingmentioning

confidence: 99%

Formation and mobility of soil organic carbon in a buried humic horizon of a volcanic ash soil

et al. 2020

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“…The 14 C/ 12 C ratio and 13 C/ 12 C ratio of carbon isotopes were measured using an accelerator mass spectrometer (JAEA-AMS-TONO) at the Tono Geoscience Center of the Japan Atomic Energy Agency. 6,7) Oxalic acid (HOxII, SRM-4990C) supplied by the National Institute of Standards and Technology (NIST) was used as the standard substance. The value of the 14 C/ 12 C ratio calculated in this way corresponds to the 14 C concentration that guarantees that 1950 AD is the starting year of the 14 C age (BP).…”

Section: Measurementsmentioning

confidence: 99%

Production Years of Iron of Old Japanese Nails of Amanosan-Kongo-ji and Kasugataisha Shrine Calibrated from <sup>14</sup>C Age

Nagata

Furunushi

2021

ISIJ Int.

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The production age of iron of old Japanese nails used at the eaves of the Kondo (main hole) of the Amanosan-Kongo-ji temple and the corridor of the Kasugataisha shrine was measured by the 14 C age method. The 14 C concentration of charcoal absorbed by iron during ironmaking is the value at the time of logging, and it was taken into consideration that the trees were logged between 20 and 25 years old. By referring to the history and repair records of each temple and shrine, it was found that iron for the nails at the Kongo-ji temple and the Kasugataisha shrine was produced between 1150-1155 and 1555-1560, respectively. These values were compared with the production year of iron of the old Japanese nails at the Daibutsuden in the Todai-ji temple, the Kuri in the Kyoto Manshuin temple and the Zaodo in the Yoshino-Kinpusen-ji temple in the previous report. 1) It was found that the iron production years of the nails at the Kasugataisha shrine and the Kinpusen-ji temple were the same, and there was a difference of 80 years in the production years between the two nails at the Kinpusen-ji temple. KEY WORDS: old Japanese nail; iron; Amanosan-Kongo-ji temple; Kasugataisya shrine; 14 C age.

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Progress on multi-nuclide AMS of JAEA-AMS-TONO

Cited by 13 publications

References 20 publications

AMS Radiocarbon Dates of Pyroclastic-Flow Deposits on the Southern Slope of the Kuju Volcanic Group, Kyushu, Japan

AMS Radiocarbon Dates of Pyroclastic-Flow Deposits on the Southern Slope of the Kuju Volcanic Group, Kyushu, Japan

Formation and mobility of soil organic carbon in a buried humic horizon of a volcanic ash soil

Production Years of Iron of Old Japanese Nails of Amanosan-Kongo-ji and Kasugataisha Shrine Calibrated from <sup>14</sup>C Age

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