LASER-BASED ANALYSIS OF CARBON-ISOTOPE RATIOS

被引：70

作者：

MURNICK, DE

PEER, BJ

机构：

[1] Department of Physics, Rutgers University, Newark

[2] Department of Geology and Planetary Science, University of Pittsburgh, Pittsburgh

来源：

SCIENCE | 1994年 / 263卷 / 5149期

关键词：

D O I：

10.1126/science.8310291

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A laser technique for analysis of carbon-13:carbon-12 ratios with the specificity of laser resonance spectroscopy and the sensitivity and accuracy typical of isotope ratio mass spectrometers is reported. The technique is based on laser optogalvanic effect spectroscopy, in which an electrical (galvanic) signal is detected in response to the optical stimulation of a resonance transition in a gas discharge species. Carbon dioxide molecular gas lasers are used, with the probed transitions being identical to the lasing transitions. Measurements for carbon dioxide samples with 100-second averaging times yield isotopic ratios with a precision of better than 10 parts per million.

引用

页码：945 / 947

页数：3

共 18 条

[1] OPTOGALVANIC SPECTROSCOPY [J].