Dipolar degrees of freedom and isospin equilibration processes in heavy ion collisions

被引：17

作者：

Papa, M. ^{[1
]}

Berceanu, I. ^{[2
]}

Acosta, L. ^{[3
]}

Amorini, F. ^{[3
]}

Agodi, C. ^{[3
]}

Anzalone, A. ^{[3
]}

Auditore, L. ^{[4
,5
]}

Cardella, G. ^{[1
]}

Cavallaro, S. ^{[3
]}

Chatterjee, M. B. ^{[6
]}

De Filippo, E. ^{[1
]}

Francalanza, L. ^{[3
,7
]}

Geraci, E. ^{[1
,7
]}

Grassi, L. ^{[1
,7
]}

Gnoffo, B. ^{[1
,7
]}

Han, J. ^{[3
]}

La Guidara, E. ^{[1
]}

Lanzalone, G. ^{[3
,8
]}

Lombardo, I. ^{[9
]}

Maiolino, C. ^{[3
]}

Minniti, T. ^{[4
]}

Pagano, A. ^{[1
]}

Pagano, E. V. ^{[3
,7
]}

Pirrone, S. ^{[1
]}

Politi, G. ^{[7
]}

Porto, F. ^{[3
,7
]}

Quattrocchi, L. ^{[4
]}

Rizzo, F. ^{[3
,7
]}

Rosato, E. ^{[9
]}

Russotto, P. ^{[3
]}

Trifiro, A. ^{[4
,5
]}

Trimarchi, M. ^{[5
,9
]}

Verde, G. ^{[1
]}

Vigilante, M. ^{[10
]}

机构：

[1] Ist Nazl Fis Nucl, I-95129 Catania, Italy

[2] Natl Inst Phys, Bucharest, Romania

[3] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95129 Catania, Italy

[4] Ist Nazl Fis Nucl, Messina, Italy

[5] Univ Fac Fis, Messina, Italy

[6] Saha Inst Nucl Phys Kolkata, Kolkata, India

[7] Univ Fac Fis & Astron, Catania, Italy

[8] Kore Univ, Enna, Italy

[9] Univ Fac Fis, Naples, Italy

[10] Ist Nazl Fis Nucl, I-80125 Naples, Italy

来源：

PHYSICAL REVIEW C | 2015年 / 91卷 / 04期

关键词：

SYMMETRY ENERGY; FRAGMENTS; EMISSION; DYNAMICS; SYSTEMS;

D O I：

10.1103/PhysRevC.91.041601

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：

The dipolar degrees of freedom on the Ca-48 + Al-27 system at 40 MeV/nucleon have been investigated for the first time with the 4 pi multidetector CHIMERA. The global variable < Dz > was measured for well-reconstructed events in binary dissipative processes. Both the close link with isospin equilibration processes and its insensitivity to later statistical hot source decays have been discussed. This latter feature provides the opportunity to investigate globally and exclusively the dynamics of the equilibration processes. At this first level of investigation the experimental evidence, supported by the study of the reference system Al-27 + Ca-40 and the auxiliary one Ca-27 + Ca-48, substantially agree with the CoMD- III calculations by describing the isovectorial forces through stiffness parameter values gamma approximate to 0.8-1.2.

引用

页数：6

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