title: Isotope 18O/16O ratio measurements of water vapor by use of the 950-nm wavelength region with cavity ring-down and photoacoustic spectroscopic techniques.
abstract: Two optical methods, cavity ring-down spectroscopy and photoacoustic spectroscopy, are applied to the measurement of the isotope ratio 18O/16O in water-vapor samples with a Nd3+:YAG pumped-dye laser. The combination band of (2v1 + v3) in the 960-nm region of water molecules is investigated for two standard water samples, the Vienna Standard Mean Ocean Water and the Standard Light Antarctic Precipitation. The results demonstrate that the two methods have the potential of compact systems for in-situ measurements of H2O isotope ratio in the environment.
authors: Department of Molecular Engineering, Graduate School of Global Environmental Studies, Kyoto University, Japan.
authors: Ken
authors: K
authors: Samura
authors: Satoshi
authors: S
authors: Hashimoto
authors: Masahiro
authors: M
authors: Kawasaki
authors: Akira
authors: A
authors: Hayashida
authors: Eriko
authors: E
authors: Kagi
authors: Takashi
authors: T
authors: Ishiwata
authors: Yutaka
authors: Y
authors: Matsumi