论文标题
均质相关性包含有关热拆卸核源特性的信息
Isobar correlations bearing information on the properties of hot disassembling nuclear sources
论文作者
论文摘要
发现基于选定的等射线的多样性的两粒子相关性对片段结合能的参数化和模型计算中假定的分解体积敏感。这些相关性的属性已在统计多裂片模型的框架中检查，这是分裂温度的函数。该模型计算表明，这些相关函数的最大值发生在良好的分离温度下，因为模型中使用的分解体积从正常密度下的3到6倍不等。这些卷在大多数统计计算中假定的范围内，并由实验支持。除了它们的位置外，还发现最大值的高度和宽度对片段结合能的参数化敏感。所有这些效应的大小也取决于相关性中考虑的等速箱。我们发现，由于对称能量与helmholtz自由能的体积依赖项之间的相互作用，在几乎对称源的情况下，涉及光镜核的相关性似乎会增强这些效果。我们建议所提出的相关函数可用于提取有关碎片能量和核源破裂体积的信息。
Two-particle correlations based on the multiplicity of selected isobars are found to be sensitive to the parameterization of the fragments' binding energies and the breakup volume assumed in the model calculations. The properties of these correlations have been examined in the framework of the Statistical Multifragmentation Model as a function of the breakup temperature. The model calculations suggest that the maxima of these correlation functions occur at well separated temperatures as the breakup volumes used in the model vary from 3 to 6 times that at normal density. These volumes are within the range assumed in most statistical calculations and supported by experiments. Besides their position, the height and width of the maxima are also found to be sensitive to the parameterization of the fragments' binding energy. The magnitude of all these effects also depends on the isobars considered in the correlations. We found that, due to an interplay between the symmetry energy and the volume dependent terms of the Helmholtz free energy, in the case of nearly symmetric sources, correlations involving light mirror nuclei seem to enhance these effects. We suggest that the proposed correlation functions could be used to extract information on the fragments' energies and on the breakup volume of nuclear sources.
