改进的运输方法中的呼吸模式
Breathing mode in an improved transport approach
摘要：
用改进的相对论玻尔兹曼-乌林-乌伦贝克（BUU）输运方法研究了核呼吸模巨共振。作为一个新的特征，我们用同样的半经典能量密度泛函实现了基态核及其相空间演化的数值处理。用这种新方法，在BUU模拟中获得了很好的基态核稳定性。这是重要的，在提取清晰的呼吸模式信号的激发能，特别是，从传输理论研究，包括平均场和碰撞效应的寿命。
英文摘要：
The nuclear breathing-mode giant monopole resonance is studied within an improved relativistic Boltzmann-Uehling-Uhlenbeck (BUU) transport approach. As a new feature, the numerical treatment of ground state nuclei and their phase-space evolution is realized with the same semiclassical energy density functional. With this new method a very good stability of ground state nuclei in BUU simulations is achieved. This is important in extracting clear breathing-mode signals for the excitation energy and, in particular, for the lifetime from transport theoretical studies including mean-field and collisional effects.
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