-2 -1 0 1 2 1 10 100  [mb] ground particle-stable all  -2 -1 0 1 2 0,1 1 10 100 -2 -1 0 1 2 N - Z 1 10 100  [mb] -2 -1 0 1 2 N - Z 0,1 1 10 100 N B Be C Figure 1: (Color online) Primary fragment production cross sections of Be, B, C and N isotopes as a function of the neutron excess, N − Z . important contributions to the primary fragmentation yields. We also point out that the calculation using all excited states cannot be considered complete, as the discrete level sets of the RIPL-2 library are incomplete at the energies available to the heavier fragments of several two-body decay modes, in particular, of n + $^{15}$O, p + $^{15}$N and α + $^{12}$C. Nevertheless, the discrete level sets contain a sufficient number of levels to clarify the principal differences to be expected between the models. The calculations were performed using the steepest-descent approximation in all cases. They furnish 16 two-fragment, 38 three-fragment, 33 four-fragment, 8 five-fragment and 2 six-fragment decay channels. The contributions of the five- and six-fragment modes are negligible and the contributions of the four-fragment modes are small. The primary fragment production cross sections of the isotopes of nitrogen, carbon, boron and beryllium are shown in Fig. 1 as functions of the neutron excess, N − Z . The ground-state-only calculation yields flatter isotopic distributions than the others, which, with the exception of boron, do not have their peaks at N = Z, the minimum of the valley of stability. The particle-stable state calculation tends to be more irregular than the ground-state-only one. It depresses $^{8}$Be production, due to its lack of particle-bound states to compete with those of other nuclei. It places the nitrogen isotope peak at A = 14 , but maintains the carbon isotope maximum at 8