FIG. 7.

The entropic part, the energy part, and the total free energy of the system, ${\mathrm{\lambda }}_s$, ${\mathrm{\lambda }}_u$, and $\mathrm{\lambda }$, respectively, in the exterior state, as a function of $\kappa R$ for two values of the strength of the potential, B: (a) B = 400 and (b) B = 2000. Free energy F is related to $\mathrm{\lambda }$ as $F={\kappa }^2\ell {\ell }_{eff}\mathrm{\lambda }∕6$.