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arXiv 1408.2840nucl-thnucl-ex
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碰撞核的angular momentum和库仑相互作用对多重碎裂的影响

Influence of angular momentum and Coulomb interaction of colliding nuclei on their multifragmentation

A. Ergun, H. Imal, N. Buyukcizmeci, R. Ogul, A. S. Botvina

摘要:

通过理论计算,研究了费米能区周围重离子碰撞中角动量和库仑效应对碎裂和多重碎裂的影响。考虑到非均匀分布的热碎片的冻结出体积内的统计多重碎裂模型(SMM)的微正则马尔可夫链计算。包括角动量和远程库仑之间的相互作用的弹丸和目标残留物导致新的功能的统计破碎图片。在这种情况下,可以获得发射碎片的尺寸与它们的速度和在反应平面中的发射的特定相关性。此外,人们可以看到这些效应对中快度和射弹/靶的运动学区域的同位素产生的显著影响。这种方法与动力学模型的碰撞模拟的关系也进行了讨论。

英文摘要:

Theoretical calculations are performed to investigate the angular momentum and Coulomb effects on fragmentation and multifragmentation in peripheral heavy-ion collisions at Fermi energies. Inhomogeneous distributions of hot fragments in the freeze-out volume are taken into account by microcanonical Markov chain calculations within the Statistical Multifragmentation Model (SMM). Including an angular momentum and a long-range Coulomb interaction between projectile and target residues leads to new features in the statistical fragmentation picture. In this case, one can obtain specific correlations of sizes of emitted fragments with their velocities and an emission in the reaction plane. In addition, one may see a significant influence of these effects on the isotope production both in the midrapidity and in the kinematic regions of the projectile/target. The relation of this approach to the simulations of such collisions with dynamical models is also discussed.

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