Constraints from isoscaling on the source size in energetic heavy ion collisions
Constraints from isoscaling on the source size in energetic heavy ion collisions
复制标题
高能重离子碰撞中等尺度对源尺寸的约束
DOI：
10.1103/physrevc.106.034606
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发表时间：
2022
影响因子：
3.1
通讯作者：
Tsang, M. B.
中科院分区：
文献类型：
--
作者：
Souza, S. R.;Donangelo, R.;Lynch, W. G.;Tsang, M. B.
在统计多碎片模型的框架中，核等尺度分析被扩展以约束两个重离子碰撞中形成的衰变源的尺寸之间的比率。研究发现，对于每个源，每个事件中观察到碎片的概率之间的比率遵循比例定律，类似于传统的核等比例缩放。然而，相应的斜率对源尺寸敏感。使用大正则系综来分析解释该属性。研究了我们的发现在多大程度上受到有限尺寸效应和热初级碎片去激发的影响。事实证明，缩放是稳健的，并且受这两个方面暗示的影响的影响很小。我们还发现，泊松分布是上述概率的相当好的近似值，与分裂阶段产生的原始碎片和碎片去激励过程结束时发现的最终碎片相关。
In the framework of the statistical multifragmentation model, the nuclear isoscaling analysis is extended to constrain the ratio between the sizes of the decaying sources formed in a collision between two heavy ions. It is found that the ratio between the probabilities of observingfragments in each event, for each of the sources, follows a scaling law, similar to the traditional nuclear isoscaling. However, the corresponding slope is sensitive to the source sizes. This property is explained analytically using the grand-canonical ensemble. The extent to which our findings are affected by finite size effects and by the deexcitation of the hot primary fragments is investigated. The scaling turns out to be robust and weakly affected by effects implied by these two aspects. We also find that the Poisson distribution is a fairly good approximation to the above mentioned probabilities, associated with both the primordial fragments, produced at the breakup stage, and the final ones, found at the end of the fragment deexcitation process.
影响因子：
9.6
作者：
A. Ono;H. Horiuchi
通讯作者：
A. Ono;H. Horiuchi