LASER ABLATION SYSTEM WITH A DIODE LASER FOR AMS 14 C MEASUREMENT OF ORGANIC MATERIALS

We constructed a laser ablation (LA) system using a diode laser for the accelerator mass spectrometry radiocarbon (AMS 14 C) measurement of organic materials. The system could extract adequate CO 2 to analyze small masses (0.1 mg C) at a resolution of 250 µm by a 5.5 W diode laser. The LA system was...

Full description

Saved in:
Bibliographic Details
Published in:Radiocarbon 2023-08, p.1-10
Main Authors: Minamitani, Fumina, Omori, Takayuki, Yamazaki, Kohei, Ozaki, Hiromasa, Hakozaki, Masataka, Yoneda, Minoru
Format: Article
Language:English
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We constructed a laser ablation (LA) system using a diode laser for the accelerator mass spectrometry radiocarbon (AMS 14 C) measurement of organic materials. The system could extract adequate CO 2 to analyze small masses (0.1 mg C) at a resolution of 250 µm by a 5.5 W diode laser. The LA system was assessed using standard materials (IAEA-C1, IAEA-C2, IAEA-C3, IAEA-C6, and Ox II) and applied to natural tree ring samples. For the LA sampling of organic samples, which generally results in incomplete combustion, tungsten (VI) oxide was used as an oxidant to achieve complete burning. The results of the measurement of standard materials showed a low 14 C background of F 14 C 0.0085 ± 0.0005 and reasonable reproduction of 14 C values. Finally, we applied this system to a single-year analysis of tree-ringed spruce timber in Alaska. It was observed to have a detectable background for the 14 C bomb peak.
ISSN:0033-8222
1945-5755
DOI:10.1017/RDC.2023.71