期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 66, 期 11-12, 页码 767-775出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2011.12.002
关键词
Optical isotopic measurement; Laser ablation plasma; Molecular emission spectrum; LIBS analysis; LAMIS of strontium
类别
资金
- Defense Threat Reduction Administration (DTRA) of the U. S. Department of Defense [LB09005541, LB09005541A]
- U.S. Department of Energy through the National Nuclear Security Administration (NNSA) [DE-AC02-05CH11231]
- NASA [NNX10CA07C]
The experimental details are reported of Laser Ablation Molecular Isotopic Spectrometry (LAMIS) and its application for performing optical isotopic analysis of solid strontium-containing samples in ambient atmospheric air at normal pressure. The LAMIS detection method is described for strontium isotopes from samples of various chemical and isotopic compositions. The results demonstrate spectrally resolved measurements of the three individual Sr-86, Sr-87, and Sr-88 isotopes that are quantified using multivariate calibration of spectra. The observed isotopic shifts are consistent with those calculated theoretically. The measured spectra of diatomic oxide and halides of strontium generated in laser ablation plasmas demonstrate the isotopic resolution and capability of LAMIS. In particular, emission spectra of SrO and SrF molecular radicals provided clean and well resolved spectral signatures for the naturally occurring strontium isotopes. A possibility is discussed of using LAMIS of strontium isotopes for radiogenic age determination. (C) 2011 Elsevier B.V. All rights reserved.
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