Helium-3 production from Pb plus Pb collisions at SPS energies with the UrQMD model and the traditional coalescence afterburner

被引：10
|
作者：
Li, QingFeng [1 ]
Wang, YongJia [1 ]
Wang, XiaoBao [1 ]
Shen, CaiWan [1 ]
机构：
[1] Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2016年 / 59卷 / 03期
基金：
中国国家自然科学基金;
关键词：
rapidity distribution of Helium-3; UrQMD model; coalescence model; Lorentz transformation; HEAVY-ION COLLISIONS; SYMMETRY ENERGY; BALANCE ENERGY; DYNAMICS;
D O I：
10.1007/s11433-015-5775-3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A potential version of the UrQMD (UrQMD/M) transport model and a traditional coalescence model are combined to calculate the production of He-3 fragments in central Pb+Pb collisions at SPS energies 20-80 GeV/nucleon. It is found that the Lorentz transformation in the afterburner influences visibly the He-3 yield and should be considered in calculations. The rapidity distribution of He-3 multiplicities (including the concave shape) can be described well with UrQMD/M when it stops during t(cut)=(100 +/- 25) fm/c and the coalescence afterburner with one parameter set of (R-0,P-0)=(3.8 fm, 0.3 GeV/c) is taken into use afterwards.
引用
收藏
页码：1 / 4
页数：4
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