In rt

Fig. 6.12. Ions produced directly from desorption of a C^q/Cjo extract from a silicon substrate using 248 nm photons and a laser fluence of (a) 20 mJ/cm2, (b) 30 mJ/cm2, and (c) 90 mJ/cm2. The inset in (a) shows the isotope distribution of the C^ peak, with the numbers x/y referring to the isotopic ratio (12C,13C)+ [6.43],

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