Exploiting neutron-rich radioactive ion beams to constrain the symmetry energy

被引：12

作者：

Kohley, Z. ^{[1
,2
]}

Christian, G. ^{[1
,3
]}

Baumann, T. ^{[1
]}

DeYoung, P. A. ^{[4
]}

Finck, J. E. ^{[5
]}

Frank, N. ^{[6
]}

Jones, M. ^{[1
,3
]}

Smith, J. K. ^{[1
,3
]}

Snyder, J. ^{[1
,3
]}

Spyrou, A. ^{[1
,3
]}

Thoennessen, M. ^{[1
,3
]}

机构：

[1] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[4] Hope Coll, Dept Phys, Holland, MI 49423 USA

[5] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA

[6] Augustana Coll, Dept Phys & Astron, Rock Isl, IL 61201 USA

来源：

PHYSICAL REVIEW C | 2013年 / 88卷 / 04期

基金：

美国国家科学基金会;

关键词：

EQUATION-OF-STATE; NUCLEAR-MATTER; RADIUS;

D O I：

10.1103/PhysRevC.88.041601

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 Modular Neutron Array (MoNA) and 4 Tm Sweeper magnet were used to measure the free neutrons and heavy charged particles from the radioactive ion beam induced Mg-32 + Be-9 reaction. The fragmentation reaction was simulated with the constrained molecular dynamics model (CoMD), which demonstrated that the < N/Z > of the heavy fragments and free neutron multiplicities were observables sensitive to the density dependence of the symmetry energy at subsaturation densities. Through comparison of these simulations with the experimental data, constraints on the density dependence of the symmetry energy were extracted. The advantage of radioactive ion beams as a probe of the symmetry energy is demonstrated through examination of CoMD calculations for stable and radioactive-beam-induced reactions.

引用

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