ON THE FORMATION OF HOLLOW CONFIGURATIONS IN HEAVY-ION COLLISIONS

Citation
M. Borunda et Ja. Lopez, ON THE FORMATION OF HOLLOW CONFIGURATIONS IN HEAVY-ION COLLISIONS, Nuovo cimento della Società Italiana di Fisica. A. Nuclei, particles and fields, 107(12), 1994, pp. 2773-2787
Citations number
22
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
11241861
Volume
107
Issue
12
Year of publication
1994
Pages
2773 - 2787
Database
ISI
SICI code
1124-1861(1994)107:12<2773:OTFOHC>2.0.ZU;2-J
Abstract
The formation of the so-called hollow configurations, ie. regions of l ow density, during the expansion of an excited nucleus is investigated . It is argued that these subnormal density regions are a direct conse quence of the liquidlike behavior of compressed nuclear matter. To stu dy this, the free isotropic expansion of an initially hot and dense sp here of nuclear matter is investigated using the hydrodynamic equation s coupled to a simple, but realistic, equation of state. An approximat e solution of these equations is obtained using a novel similarity met hod. The observed behavior of the radial nuclear density shows the app earance of subnormal density regions and matter shells early in the ex pansion. This result occurs for all values of interest of the nuclear compressibility but only for certain initial conditions of the velocit y, thus confirming the possibility of creating hollow configurations d uring the break-up of nuclei as predicted by other numerical calculati ons.