Fragment properties of fragmenting heavy nuclei produced in central and semi-peripheral collisions

被引：20

作者：

Bonnet, E. ^{[1
,2
]}

Borderie, B. ^{[1
]}

Le Neindre, N. ^{[1
]}

Rivet, M. F. ^{[1
]}

Bougault, R. ^{[3
]}

Chbihi, A. ^{[2
]}

Dayras, R. ^{[4
]}

Frankland, J. D. ^{[2
]}

Galichet, E. ^{[1
,5
]}

Gagnon-Moisan, F. ^{[1
,6
]}

Guinet, D. ^{[7
]}

Lautesse, P. ^{[7
]}

Lukasik, J. ^{[8
]}

Mercier, D. ^{[3
,7
]}

Parlog, M. ^{[3
,12
]}

Rosato, E. ^{[9
,10
]}

Roy, R.

Sfienti, C. ^{[11
]}

Vigilante, M. ^{[9
,10
]}

Wieleczko, J. P. ^{[2
]}

Zwieglinski, B. ^{[13
]}

机构：

[1] Univ Paris 11, Inst Phys Nucl, CNRS, IN2P3, F-91406 Orsay, France

[2] IN2P3, CNRS, CEA, DSM,GANIL, F-14076 Caen, France

[3] Univ Caen, ENSICAEN, IN2P3, CNRS,LPC, F-14050 Caen, France

[4] CEA, IRFU, SPhN, F-91191 Gif Sur Yvette, France

[5] Conservatoire Natl Arts & Metiers, F-75141 Paris 03, France

[6] Univ Laval, Dept Phys Genie Phys & Opt, Phys Nucl Lab, Quebec City, PQ G1K 7P4, Canada

[7] Univ Lyon 1, CNRS, Inst Phys Nucl, IN2P3, F-69622 Villeurbanne, France

[8] Inst Nucl Phys IFJ PAN, PL-31342 Krakow, Poland

[9] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy

[10] Univ Naples Federico II, Sez INFN, I-80126 Naples, Italy

[11] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[12] Natl Inst Phys & Nucl Engn, RO-76900 Bucharest, Romania

[13] Andrzej Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

来源：

NUCLEAR PHYSICS A | 2009年 / 816卷

关键词：

NUCLEAR REACTIONS Sn(Xe-129; X); E=25; 32; 39; 45; 50; MeV/nucleon; Au-197(Au-197; E=80; measured fragment charge partitions; average fragment and charged-particle multiplicities using the INDRA detector; deduced radial collective energy for quasi-fusion and quasi-projectile sources; GAS PHASE-TRANSITION; ION COLLISIONS; INDRA ARRAY; HOT NUCLEI; SPINODAL DECOMPOSITION; CSI(TL) SCINTILLATORS; ATOMIC-NUMBER; LARGE RANGE; FREEZE-OUT; MULTIFRAGMENTATION;

D O I：

10.1016/j.nuclphysa.2008.11.005

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：

Fragment properties of hot fragmenting sources of similar sizes produced in central and semi-peripheral collisions are compared in the excitation energy range 5-10 A MeV. For semi-peripheral collisions a method for selecting compact quasi-projectiles sources in velocity space similar to those of fused systems (central collisions) is proposed. The two major results are related to collective energy. The weak radial collective energy observed for quasi-projectile sources is shown to originate from thermal pressure only. The larger fragment multiplicity observed for fused systems and their more symmetric fragmentation are related to the extra radial collective energy due to expansion following a compression phase during central collisions. A first attempt to locate where the different Sources break in the phase diagram is proposed. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1 / 18

页数：18

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