Correlations of intermediate mass fragments from Fe+Ta, Au, and Th collisions

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.1280· OSTI ID:6402957

Sangster, T C; Begemann-Blaich, M; Blaich, T; Britt, H C; Hansen, L F; Namboodiri, M N; Peilert, G ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States) Gesellschaft fuer Schwerionenforschung, D-64220 Darmstadt (Germany) Universitaet Mainz, D-55099 Mainz (Germany)

Charge, velocity, and angular correlations between intermediate mass fragments (IMF) are presented for 50 and 100 MeV/nucleon Fe bombardments of Ta, Au, and Th targets. Correlation functions generated as a function of the relative velocity and the opening angle between two IMF's are qualitatively independent of the projectile energy and target mass and show a suppression at small relative velocities and opening angles due to the Coulomb repulsion between the fragments. The correlations are consistent with IMF's emitted primarily from a highly excited target residue following a rapid preequilibrium cascade. The correlation data are compared to model calculations using the event generator MENEKA and the quantum molecular dynamics (QMD) code with a statistical deexcitation of residual fragments utilizing the multifragmentation code SMM. All data are consistent with a simultaneous multifragmentation at a freeze-out density of 0.1--0.3 times normal nuclear matter density or a more sequential emission with time constant [tau][le]500 fm/[ital c].

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6402957
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 51:3; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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