Fragment Flow and the Multifragmentation Phase Space

Authors

Document Type

Article

Publication Date

1-2-1995

Publication Source

Physical Review Letters

Volume Number

74

Issue Number

1

First Page

38

Last Page

41

Publisher

American Physical Society

Abstract

Fragment distributions have been measured for Au + Au collisions at EA=100 and 1000 MeV. A high detection efficiency for fragments was obtained by combining the ALADIN spectrometer and the MSU-Miniball/WU-Miniwall array. At both energies the maximum multiplicity of intermediate mass fragments (IMF) normalized to the size of the decaying system is about one IMF per 30 nucleons but the element distributions show significant differences. Within a coalescence picture the suppression of heavy fragments in central collisions at EA=100 MeV may be related to a reduction of the density in momentum space which is caused by the collective expansion.

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