Signals for the transition from liquid to gas in hot nuclei Conference Paper uri icon

abstract

  • Hot nuclei produced in 5-15 GeV proton-, pion-and antiproton-induced reactions on 197Au have been studied with the Indiana Silicon Sphere (ISiS) charged-particle detector array at the Brookhaven AGS accelerator. Each event has been reconstructed from the data to determine the excitation energy, charge and mass of the emitting source. Using E*/A as a sorting variable, the IMF kinetic energy spectra have been examined to assess the degree of thermal expansion in these reactions. Relative to SMM and SIMON-explosion calculations, the data suggest a weak extra thermal expansion energy above E*/A 5 MeV. IMF-IMF correlation functions show an order-of-magnitude decrease in the relative emission time in the interval E*/A 2-5 MeV. Above this value, a constant limiting time of 20-50 fm/c is found. These observations are consistent with the transition from liquid to vapor due to thermal heating.

published proceedings

  • NUCLEAR PHYSICS A

author list (cited authors)

  • Viola, V. E., Lefort, T., Beaulieu, L., Kwiatkowski, K., Wang, G., de Souza, R., ... Yennello, S. J.

citation count

  • 9

complete list of authors

  • Viola, VE||Lefort, T||Beaulieu, L||Kwiatkowski, K||Wang, G||de Souza, R||Pienkowski, L||Botvina, A||Breuer, H||Durand, D||Korteling, RG||Laforest, R||Martin, E||Ramakrishnan, E||Rowland, D||Ruangma, A||Winchester, E||Yennello, SJ

publication date

  • January 2001