500A MeV ^(56)Fe+Em相互作用中产生的靶核碎片研究  

Investigation of Target Fragments Form 500A GeV ^(56)Fe+Em

作　　者：白彩艳[1,2] 梁云阶[1] 牛耀婕[2] 

机构地区：[1]晋中学院物理与电子工程学院,山西晋中030600 [2]山西师范大学粒子物理研究所,山西临汾041004

出　　处：《晋中学院学报》2010年第3期4-7,共4页Journal of Jinzhong University

基　　金：山西省自然科学基金<中高能原子核多重碎裂研究>项目(200811005)

摘　　要：高能核-核碰撞中靶核和射弹核的碎片分布,是研究核碎裂机制的重要方面.通过对500AMeV56Fe与原子核乳胶相互作用产生的靶核碎片的角分布的测量,可以发现重靶AgBr的黑粒子的发射角关于90°方向近似对称,即表明在90°方向存在侧向流.我们知道黑粒子是从激发的剩余靶核蒸发出来的,从流体力学模型的角度上来看,侧向流产生原因可能是弹核旁观体的弹出与弹核参加者产生侧向集体流造成了靶核旁观体向相反方向运动,从而在接近90°的方向上产生靶核碎片集体流.The fragment distribution of the target nucleus and projectile nuclear were studied in the high-energy nucleusnucleus collisions. They are the important aspects of the mechanism of nuclear fragmentation. In 500 A MeV 56 Fe and nuclear emulsion interaction the target fragment angular distribution was measured. The rearget AgBr black particle emission angle and the spatial angular distribution on the 90° direction for approximately symmetrical were found. This suggests that in the 90°direction there is lateral flow. It is known that the black particles are evaporated from the target of nuclear spectator body. From the viewpoint of the hydrodynamic model, the lateral flow may be produced by the movement of the target nuclear spectator body in the opposite direction, which was caused by the collective flow of nuclear debris resulting from the collision of the projectile spectator body＇s ＂pop＂ and the projectile participants in the direction of about 90° .

关 键 词：靶核碎片 黑粒子 角分布 

分 类 号：O571[理学—粒子物理与原子核物理]