Pulsed reactive crossed beam laser ablation of La0.6Ca0.4CoO3 using 18O. Where does the oxygen come from?

Montenegro MJ, Conder K, Döbeli M, Lippert T, Willmott PR & Wokaun A
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Montenegro, M. J., Conder, K., Döbeli, M., Lippert, T., Willmott, P. R., & Wokaun, A. (2006). Pulsed reactive crossed beam laser ablation of La0.6Ca0.4CoO3 using 18O. Where does the oxygen come from? Applied Surface Science, 252(13 SPEC. ISS.), 4642-4646. https://doi.org/10.1016/j.apsusc.2005.07.105