A batch preparation method for graphite targets with low background for AMS [sup 14]C measurements

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Radiocarbon; (United States)

OSTI ID:6184053

Kitagawa, Hiroyuki ^[1]; Masuzawa, Toshiyuki; Matsumoto, Eiji ^[2]; Makamura, Toshio ^[3]

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1. Water Research Inst., Nagoya Univ. (Japan) International Research Center for Japanese Studies, Nishikyp-ku, Kyoto (Japan)
2. Water Research Inst., Nagoya Univ. (Japan)
3. Dating and Materials Research Center, Nagoya Univ. (Japan)

The authors have developed a method of graphitization from CO[sub 2] samples for accurate [sup 14]C measurements by accelerator mass spectrometry. Their batch method, using a sealed Vycor tube, reduces the risk of contamination during graphitization and makes it possible to prepare many samples in a short time (typically 20 samples per day). They also describe details of the target-preparation method involving carbon isotopic fractionation during graphitization, yield of graphite from CO[sub 2], ion-beam intensity of the target, and background (or blank) level estimated using bituminous coal.

• OSTI ID: 6184053
• Journal Information: Radiocarbon; (United States), Vol. 35:2; ISSN 0033-8222
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
29 ENERGY PLANNING
POLICY AND ECONOMY
CARBON DIOXIDE
MASS SPECTROSCOPY
CARBON 14
GRAPHITE
GRAPHITIZATION
ISOTOPE DATING
SAMPLE PREPARATION
AGE ESTIMATION
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON OXIDES
CHALCOGENIDES
ELEMENTAL MINERALS
ELEMENTS
EVEN-EVEN NUCLEI
ISOTOPES
LIGHT NUCLEI
MINERALS
NONMETALS
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOISOTOPES
SPECTROSCOPY
YEARS LIVING RADIOISOTOPES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
290301 - Energy Planning & Policy- Environment
Health
& Safety- Regional & Global Environmental Aspects- (1992-)