TY - JOUR
T1 - Signals for the transition from liquid to gas in hot nuclei
AU - Viola, V. E.
AU - Lefort, T.
AU - Beaulieu, L.
AU - Kwiatkowski, K.
AU - Wang, G.
AU - De Souza, R.
AU - Pienkowski, L.
AU - Botvina, A.
AU - Breuer, H.
AU - Durand, D.
AU - Korteling, R. G.
AU - Laforest, R.
AU - Martin, E.
AU - Ramakrishnan, E.
AU - Rowland, D.
AU - Ruangma, A.
AU - Winchester, E.
AU - Yennello, S. J.
PY - 2001/1/29
Y1 - 2001/1/29
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0035966758&partnerID=8YFLogxK
U2 - 10.1016/s0375-9474(00)00526-1
DO - 10.1016/s0375-9474(00)00526-1
M3 - Article
AN - SCOPUS:0035966758
VL - 681
SP - 267
EP - 274
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
SN - 0375-9474
IS - 1-4
ER -