Abstract:
A basic feature of the nuclear equation of state is not yet understood: the dependence of the nuclear caloric curve on the neutron-proton asymmetry. Predictions of theoretical models differ on the magnitude and even the sign of this dependence. In this work, the nuclear caloric curve is examined for fully reconstructed quasi-projectiles around mass A= 50. The caloric curve extracted with the momentum quadrupole fluctuation thermometer shows that the temperature varies linearly with quasi-projectile asymmetry N-ZA. An increase in asymmetry of 0.15 units corresponds to a decrease in temperature on the order of 1 MeV. These results also highlight the importance of a full quasi-projectile reconstruction in the study of thermodynamic properties of hot nuclei. © 2013 Elsevier B.V.
Authors:
McIntosh, A.B.
Bonasera, A.
Cammarata, P.
Hagel, K.
Heilborn, L.
Kohley, Z.
Mabiala, J.
May, L.W.
Marini, P.
Raphelt, A.
Souliotis, G.A.
Wuenschel, S.
Zarrella, A.
Yennello, S.J.
