Figure 48

Figure 48: Pippard’s coherence length for the neutron star crust model of Negele & Vautherin[303]. The coherence length has been calculated from Equation (138View Equation), assuming that the neutron superfluid is uniform with the density of unbound neutrons denoted by &tidle;ρG in [303]. Three representative cases have been considered: the BCS pairing gap ΔF, and the more realistic pairing gaps of Cao et al. [69] and Schwenk et al. [366]. The gaps are shown in Figure 46. For comparison, we also show the radius Rcell of the Wigner–Seitz sphere and the mean inter-neutron spacing dn.