A New 1MV AMS Facility at KIGAM

Abstract

A 1MV AMS was installed in KIGAM (Korea Institute of Geoscience and Mineral Resources). After 4 months of installation, the AMS started normal operation from January 2008. This multi-element AMS was developed by HVEE to measure 14C, 10Be, and 26Al. The results of an acceptance test demonstrate that this machine is capable of routine 14C age dating and of measurements of other radioisotopes in terms of accuracy and precision as well as the background level. After installation, an investigation aimed at determining the stable operating conditions was conducted, and background levels were determined to be as low as 10–15 for 14C and 10–14 for 10Be and 26Al.

Age Determination of the Kawagodaira Volcanic Eruption in Japan by 14C Wiggle-Matching

“…The CO 2 was then cryogenically separated, and a portion of about 1.2 mg carbon was reduced to graphite at 600 C in the presence of hydrogen gas and catalytic iron powder. The graphite was pressed into an aluminum cathode for AMS measurement, and the 14 C/ 12 C and 13 C/ 12 C ratios were measured by a 1MV AMS system at the Korea Institute of Geoscience and Mineral Resources, KIGAM (Hong et al 2010). …”

Factors controlling typhoons and storm rain on the Korean Peninsula during the Little Ice Age

“…Carbonate samples were milled. Samples were combusted in an elemental analyzer and generated CO 2 gas was purified cryogenically in a high-vacuum automatic preparation system (Hong et al 2010a) and converted to graphite by reduction on Fe powder with hydrogen gas in a quartz tube. We corrected for carbon isotope fractionation using δ 13 C values measured at the AMS facility (Hong et al 2010b).…”

Water pH and temperature in Lake Biwa from MBT'/CBT indices during the last 280 000 years

“…2). The age-depth model for core BIW07-6 was generated from 6 well-dated, widespread ash layers and 13 accelerator mass spectrometry (AMS) 14 C ages of plant wood fossils (partly reported in Kitagawa et al, 2010) analysed at 3 AMS facilities during the past decade: the Center for Chronological Research at Nagoya University (Laboratory code NUTA2; Nakamura et al, 2000Nakamura et al, , 2004, the W. M. Keck Carbon Cycle Accelerator Mass Spectrometry Laboratory (UCIAMS; Southon et al, 2004a, b), and the Korean Institute of Geoscience and Mineral Resources (KIGAM; Hong et al, 2010) (Table 1). The 14 C ages were converted to calendar ages using the IntCal13 data set (Reimer et al, 2013).…”

“…2; Takemura et al, 2010). The age-depth model for core BIW08-B was generated from 17 dated widespread ash layers, 2 AMS 14 C age of plant wood fossils analysed at KIGAM (Hong et al, 2010), and 9 dated anhysteretic remanent magnetisation (ARM) events (Table 2). The 14 C ages were converted to calendar ages using the IntCal13 data set (Reimer et al, 2013).…”