| J-L.Charvet, R.Dayras, D.Durand, O.Lopez, L.Nalpas,
A.Van Lauwe, C.Volant, G.Auger, B.Bouriquet,
A.M.Buta, A.Chbihi, J.Colin, D.Cussol, D.Doré,
J.D.Frankland, S.Hudan, F.Lavaud, J.F.Lecolley,
L.Manduci, J.Normand, P.Pawlowski, E.Rosato,
J.C.Steckmeyer, E.Vient, M.Vigilante |
A recent analysis of the charge (Z) correlations in the Delta(Z)- plane
for Xe+Sn central collisions at 32 MeV/u has shown an enhancement in the
production of equally sized fragments (low Delta(Z)) which was interpreted as
evidence for spinodal decomposition. However the signal was weak.
After a critical analysis of its robustness, we propose in this paper
a new technique to build the uncorrelated
yield in the charge correlation function. The application of this method to
Xe+Sn central collision data at
32, 39, 45 and 50 MeV/u does not show any significant enhancement at low
Delta(Z) at variance with what it is expected from spinodal decomposition.
|
