THE SYMMETRY ENERGY IN NUCLEAR REACTIONS

被引：14

作者：

Trautmann, W. ^{[1
]}

Bianchin, S. ^{[1
]}

Botvina, A. S. ^{[1
]}

Le Fevre, A. ^{[1
]}

Leifels, Y. ^{[1
]}

Sfienti, C. ^{[1
]}

Buyukcizmeci, N. ^{[2
]}

Ogul, R. ^{[2
]}

Mishustin, I. N. ^{[3
]}

Chartier, M. ^{[4
]}

Wu, P. Z. ^{[4
]}

Lemmon, R. C. ^{[5
]}

Li, Q. ^{[6
]}

Lukasik, J. ^{[7
]}

Pawlowski, P. ^{[7
]}

Pagano, A. ^{[8
,9
]}

Russotto, P. ^{[8
,9
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[2] Selcuk Univ, Dept Phys, TR-42079 Konya, Turkey

[3] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[4] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[5] STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[6] Huzhou Teachers Coll, Sch Sci, Huzhou 313000, Peoples R China

[7] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[8] Ist Nazl Fis Nucl, Sez Catania, I-95123 Catania, Italy

[9] LNS, I-95123 Catania, Italy

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2010年 / 19卷 / 8-9期

关键词：

EQUATION-OF-STATE; NEUTRON; DEPENDENCE; MULTIFRAGMENTATION; COLLISIONS; EMISSION;

D O I：

10.1142/S0218301310016077

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：

New results for the strength of the symmetry energy are presented which illustrate the complementary aspects encountered in reactions probing nuclear densities below and above saturation. A systematic study of isotopic effects in spectator fragmentation was performed at the ALADIN spectrometer with Sn-124 primary and Sn-107 and La-124 secondary beams of 600 MeV/nucleon incident energy. The analysis within the Statistical Fragmentation Model shows that the symmetry-term coefficient entering the liquid-drop description of the emerging fragments decreases significantly as the multiplicity of fragments and light particles from the disintegration of the produced spectator systems increases. Higher densities were probed in the FOPI/LAND study of nucleon and light-particle flows in central and mid-peripheral collisions of Au-197 + Au-197 nuclei at 400MeV/nucleon incident energy. From the comparison of the measured neutron and hydrogen squeeze-out ratios with predictions of the UrQMD model a moderately soft symmetry term with a density dependence of the potential term proportional to (rho=rho(0))(gamma) with gamma = 0.9 +/- 0.3 is favored.

引用

页码：1653 / 1663

页数：11

共 50 条

[31] Flow probe of symmetry energy in relativistic heavy-ion reactions
Russotto, P.
Cozma, M. D.
Le Fevre, A.
Leifels, Y.
Lemmon, R.
Li, Q.
Lukasik, J.
Trautmann, W.
EUROPEAN PHYSICAL JOURNAL A, 2014, 50 (02) : 1 - 20
[32] Transverse emission of isospin ratios as a probe of high-density symmetry energy in isotopic nuclear reactions
Feng, Zhao-Qing
PHYSICS LETTERS B, 2012, 707 (01) : 83 - 87
[33] Nuclear symmetry energy and the role of the tensor force
Vidana, Isaac
Polls, Artur
Providencia, Constanca
PHYSICAL REVIEW C, 2011, 84 (06):
[34] Decoding the density dependence of the nuclear symmetry energy
Lynch, W. G.
Tsang, M. B.
PHYSICS LETTERS B, 2022, 830
[35] Phase transitions and symmetry energy in nuclear pasta
Dorso, C. O.
Frank, G. A.
Lopez, J. A.
NUCLEAR PHYSICS A, 2018, 978 : 35 - 64
[36] Crustal torsional oscillations and nuclear symmetry energy
Sotani, Hajime
PROCEEDINGS OF THE 14TH INTERNATIONAL SYMPOSIUM ON NUCLEI IN THE COSMOS (NIC2016), 2016,
[37] Isobaric yield ratios and the symmetry energy in heavy-ion reactions near the Fermi energy
Huang, M.
Chen, Z.
Kowalski, S.
Ma, Y. G.
Wada, R.
Keutgen, T.
Hagel, K.
Barbui, M.
Bonasera, A.
Bottosso, C.
Materna, T.
Natowitz, J. B.
Qin, L.
Rodrigues, M. R. D.
Sahu, P. K.
Wang, J.
PHYSICAL REVIEW C, 2010, 81 (04):
[38] Symmetry Energy of Dilute Warm Nuclear Matter
Natowitz, J. B.
Roepke, G.
Typel, S.
Blaschke, D.
Bonasera, A.
Hagel, K.
Klaehn, T.
Kowalski, S.
Qin, L.
Shlomo, S.
Wada, R.
Wolter, H. H.
PHYSICAL REVIEW LETTERS, 2010, 104 (20)
[39] Fragmentation in isotopic and isobaric systems as probe of density dependence of nuclear symmetry energy
Kaur, Mandeep
Gautam, Sakshi
Puri, Rajeev K.
NUCLEAR PHYSICS A, 2016, 955 : 133 - 144
[40] Studying sub-saturation density symmetry energy with different nuclear thermometers
Duan, Hui-Xiao
Zhang, Fan
Su, Jun
Zhu, Long
Guo, Chen-Chen
EUROPEAN PHYSICAL JOURNAL A, 2023, 59 (04)

← 1 2 3 4 5 →