C / C ratio 12 13 − determination in nanodiamonds by atom - probe tomography
نویسندگان
چکیده
The astrophysical origins of ∼3 nm-diameter meteoritic nanodiamonds can be inferred from the ratio of C/ C 12 13 . It is essential to achieve high spatial and mass resolving power and minimize all sources of signal loss in order to obtain statistically significant measurements. We conducted atom-probe tomography on meteoritic nanodiamonds embedded between layers of Pt. We describe sample preparation, atom-probe tomography analysis, 3D reconstruction, and bias correction. We present new data from meteoritic nanodiamonds and terrestrial standards and discuss methods to correct isotopic measurements made with the atom-probe tomograph. & 2015 Elsevier B.V. All rights reserved.
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