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arXiv 1208.5318nucl-th
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原子核的体积和表面对称能系数与温度的关系

Temperature dependence of volume and surface symmetry energy coefficients of nucle

J. N. De, S. K. Samaddar, B. K. Agrawal

摘要:

在减化有限温度Thomas-Fermi框架下,采用零程Skyrme型KDE 0和有限程修正的Seyler-Blanchard相互作用,计算了一组跨越整个周期表的球形和近球形核的能量和自由能的热演化.所计算的能量进行全球拟合的精神的液滴模型。该模型中提取的参数不仅反映了有限核的体积对称性系数和表面对称性系数的温度依赖性,还反映了有限核的体积对称性系数和表面能系数的温度依赖性。表面对称能的温度依赖性被发现是非常大的,而体积对称能的结果是比较温和的。

英文摘要:

The thermal evolution of the energies and free energies of a set of spherical and near-spherical nuclei spanning the whole periodic table are calculated in the subtracted finite-temperature Thomas- Fermi framework with the zero-range Skyrme-type KDE0 and the finite-range modified Seyler-Blanchard interaction. The calculated energies are subjected to a global fit in the spirit of the liquid-drop model. The extracted parameters in this model reflect the temperature dependence of the volume symmetry and surface symmetry coefficients of finite nuclei, in addition to that of the volume and surface energy coefficients. The temperature dependence of the surface symmetry energy is found to be very substantial whereas that of the volume symmetry energy turns out to be comparatively mild.

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