Signals for a transition from surface to bulk emission in thermal multifragmentation Academic Article uri icon

abstract

  • Excitation-energy-gated two-fragment correlation functions have been studied between E*/A = (2-9) A MeV for equilibriumlike sources formed in 810 GeV/c and p+197 Au reactions. Comparison with an N-body Coulomb-trajectory code shows an order of magnitude decrease in the fragment emission time in the interval E*/A =(2-5) A MeV, followed by a nearly constant breakup time at higher excitation energy. The decrease in emission time is strongly correlated with the onset of multifragmentation and thermally induced radial expansion, consistent with a transition from surface-dominated to bulk emission expected for spinodal decomposition. 2000 The American Physical Society.

published proceedings

  • Physical Review Letters

author list (cited authors)

  • Beaulieu, L., Lefort, T., Kwiatkowski, K., de Souza, R. T., Hsi, W. C., Pienkowski, L., ... Yennello, S. J.

citation count

  • 93

complete list of authors

  • Beaulieu, L||Lefort, T||Kwiatkowski, K||de Souza, RT||Hsi, WC||Pienkowski, L||Back, B||Bracken, DS||Breuer, H||Cornell, E||Gimeno-Nogues, F||Ginger, DS||Gushue, S||Korteling, RG||Laforest, R||Martin, E||Morley, KB||Ramakrishnan, E||Remsberg, LP||Rowland, D||Ruangma, A||Viola, VE||Wang, G||Winchester, E||Yennello, SJ

publication date

  • January 2000