Isoscaling bearing information on the nuclear caloric curve

We show that the qualitative behavior of the nuclear caloric curve can be inferred from the energy dependence of the isoscaling parameters. Since there are strong indications that the latter are not distorted by the secondary decay of primary hot fragments, in contrast to other observables, this suggests that valuable information on the nuclear caloric curve may be obtained through the analysis presented in this work.

Figure 1

Caloric curve predicted by the ISMM for the neutron (triangles) and proton (squares) rich sources. In the upper panel it is assumed that the breakup occurs at a fixed density whereas the breakup volume is allowed to change in the results displayed in the bottom panel. For details see text.

Figure 2

Reciprocal of the isoscaling parameter $\alpha$ as a function of the excitation energy. Constant breakup volume is assumed in the upper panel, while in the lower one the results were obtained with variable breakup volume. The lines illustrate the slopes in each region. For details see text.

Figure 3

Same as Fig. 2. The circles represent the predictions of the microcanonical approach, whereas the results obtained with the grand-canonical ensemble are depicted by the squares. For details see text.