Multifragmentation of very heavy nuclear systems (III):: Fragment velocity correlations and event topology at freeze-out

被引:26
|
作者
Tabacaru, G
Rivet, MF [1 ]
Borderie, B
Pârlog, M
Bouriquet, B
Chbihi, A
Frankland, JD
Wieleczko, JP
Bonnet, E
Bougault, R
Dayras, R
Galichet, E
Guinet, D
Lautesse, P
Le Neindre, N
Lopez, O
Manduci, L
Nalpas, L
Pawlowski, P
Rosato, E
Roy, R
Salou, S
Tamain, B
Vient, E
Vigilante, M
Volant, C
机构
[1] CNRS, IN2P3, Inst Phys Nucl, F-91406 Orsay, France
[2] Natl Inst Phys & Nucl Engn, RO-76900 Bucharest, Romania
[3] CEA, GANIL, F-14076 Caen, France
[4] CNRS, IN2P3, F-14076 Caen, France
[5] ENSICAEN, CNRS, IN2P3, Lab Phys Corpusculaire Caen, F-14050 Caen, France
[6] Univ Caen, F-14050 Caen, France
[7] CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France
[8] Conservatoire Natl Arts & Metiers, F-75141 Paris 03, France
[9] CNRS, IN2P3, Inst Nucl Phys, F-69622 Villeurbanne, France
[10] Univ Villeurbanne, F-69622 Villeurbanne, France
[11] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[12] Univ Naples Federico II, Sez INFN, Dipartimento Sci Fisiche, I-80126 Naples, Italy
[13] Univ Laval, Dept Phys, Quebec City, PQ G1K 7P4, Canada
关键词
NUCLEAR REACTIONS Sn(Xe-129; X); E=32; MeV/nucleon; U(Gd-155; E=36; measured fragments energy and charge distributions; yields; velocity correlations for central collisions; comparison to stochastic mean-field calculation; deduced freeze-out parameters;
D O I
10.1016/j.nuclphysa.2005.08.019
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Kinetic energy spectra and fragment velocity correlations, simulated by means of stochastic mean-field calculations, are successfully confronted with experimental data for single multifragmenting sources prepared at the same excitation energy per nucleon in 32 A MeV Xe-129 + Sn-nat and 36 A MeV Gd-155 + U-nat central collisions. Relying thus Oil Simulations, average freeze-out times of 200-240 fm/c are estimated. The corresponding spatial distributions of fragments are more compact for the lighter system (similar to 3-4V(0) vs. similar to 8V(0)). (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:371 / 386
页数:16
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