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(Color online) SIMS depth profile of sample A showing the intensity related to 12C and 13C diamond (m/z = 12 and m/z = 13) as well as that related to nitrogen (CN at m/z = 26).
(Color online) High spectral resolution CL spectra of exciton recombinations at ∼10 K in 13C and 12C diamond. Spectra are taken in parts of the sample far from the 12C/13C interface (sample B).
(Color online) (a) Principle of LD measurement in 13C diamond by CL. The e-beam is moved along the x direction on the cross section while the collecting mirror is kept fixed. (b) CL spectra recorded each Δx = 100 nm (c) Attenuation plots of the exciton recombination intensity in the 12C layer as a function of x. For samples A and B, the GV diameter is indicated and LD is deduced from a linear regression.
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