Fig. D.1

Effects on isotopic ratios of differing branching ratios, 1.5 and 0.69, respectively, for the reactions of 14N14N and 14N15N with He+ (Sect. 4.2.3). Results with different branching ratio (full curves) are compared to those obtained with both branching ratios equal to 1.5 (dashed curves). The R15 set of fractionation reactions was used in these calculations.
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