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The total energy of the bud and the neck, Ftot, as a function of the coat aperture radius, rap. The curves (1–6) correspond to values of R as in Fig. 3 a. The lines (a–c) represent the energies corresponding to spontaneous hemifission (ΔFhf = 0) for Js = 0.26 nm−1, Js = 0, and Js = −0.11 nm−1, respectively.
