Statistical multifragmentation of non-spherical expanding sources in central heavy-ion collisions
Creators
- Le Fevre, A.
- Ploszajczak, M.
- Toneev, V.D.
- Auger, G.
- Begemann-Blaich, M.L.
- Bellaize, N.
- Bittiger, R.
- Bocage, F.
- Borderie, B.
- Bougault, R.
- Bouriquet, B.
- Charvet, J.L.
- Chbihi, A.
- Dayras, R.
- Durand, D.
- Frankland, J.D.
- Galichet, E.
- Gourio, D.
- Guinet, D.
- Hudan, S.
- Hurst, B.
- Lautesse, P.
- Lavaud, F.
- Legrain, R.
- Lopez, O.
- Lukasik, J.
- Lynen, U.
- Mueller, W.F.J.
- Nalpas, L.
- Orth, H.
- Plagnol, E.
- Rosato, E.
- Saija, A.
- Schwarz, C.
- Sfienti, C.
- Tamain, B.
- Trautmann, W.
- Trzcinski, A.
- Turzo, K.
- Vient, E.
- Vigilante, M.
- Volant, C.
- Zwieglinski, B.
- Botvina, A.S.
Description
We study the anisotropy effects measured with INDRA at GSI in central collisions of 129Xe+natSn at 50 A MeV and 197Au+197Au at 60, 80, 100 A MeV incident energy. The microcanonical multifragmentation model with non-spherical sources is used to simulate an incomplete shape relaxation of the multifragmenting system. This model is employed to interpret observed anisotropic distributions in the fragment size and mean kinetic energy. The data can be well reproduced if an expanding prolate source aligned along the beam direction is assumed. An either non-Hubblean or non-isotropic radial expansion is required to describe the fragment kinetic energies and their anisotropy. The qualitative similarity of the results for the studied reactions suggests that the concept of a longitudinally elongated freeze-out configuration is generally applicable for central collisions of heavy systems. The deformation decreases slightly with increasing beam energy
Additional details
Identifiers
- DOI
- 10.1016/j.nuclphysa.2004.01.133;
- arXiv
- arXiv:nucl-ex/0309016v2;
- PII
- S0375947404001861;
Publishing Information
- Journal Title
- Nuclear Physics. A
- Journal Volume
- 735
- Journal Issue
- 1-2
- Journal Page Range
- p. 219-247
- ISSN
- 0375-9474
- CODEN
- NUPABL
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35056617
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ANISOTROPY; GOLD 197 REACTIONS; GOLD 197 TARGET; KINETIC ENERGY; NUCLEAR DEFORMATION; NUCLEAR FRAGMENTATION; NUCLEAR FRAGMENTS; TIN 116 TARGET; TIN 118 TARGET; TIN 120 TARGET; TIN 124 TARGET; XENON 129 REACTIONS
- Descriptors DEC
- DEFORMATION; ENERGY; HEAVY ION REACTIONS; NUCLEAR REACTIONS; TARGETS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.