微观描述热核裂变寿命（英文）
发布时间：2018-09-18 11:02
【摘要】：有关热核裂变的研究与反应堆中的诱发裂变,天体环境中的裂变,以及超重元素的合成等密切相关。热核裂变的研究通常是基于Bohr-Wheeler的统计裂变理论。而统计模型的研究十分依赖唯像的能级密度和位能面。因此,提出基于微观的有限温度的能量密度泛函理论计算热核的裂变寿命。可以微观自洽地计算出温度相关的裂变位垒高度,曲率,集体质量参数。基于虚自由能法,从低温到高温的裂变寿命可以由一个统一的框架给出。展示了在裂变研究中温度相关裂变位垒的重要性,并讨论了微观描述热核裂变的前景。
[Abstract]:The study of thermonuclear fission is closely related to the fission induced in reactor, fission in celestial environment, and the synthesis of overweight elements. The study of thermonuclear fission is usually based on Bohr-Wheeler 's statistical fission theory. The study of the statistical model depends heavily on the phenomenological energy level density and potential energy surface. Therefore, an energy density functional theory based on microcosmic finite temperature is proposed to calculate the fission lifetime of the thermonuclear. The temperature dependent fission barrier height, curvature and collective mass parameters can be calculated microscopically and consistently. Based on the virtual free energy method, the fission life from low temperature to high temperature can be given by a unified framework. The importance of temperature-dependent fission barrier in fission research is demonstrated and the prospect of microcosmic description of thermonuclear fission is discussed.
【作者单位】： 北京大学物理学院核物理与核技术国家重点实验室;
【基金】：National Natural Science Foundation of China(11375016,11522538) Doctoral Program of Higher Education of China(20130001110001)~~
【分类号】：O571.43
本文编号：2247706
[Abstract]:The study of thermonuclear fission is closely related to the fission induced in reactor, fission in celestial environment, and the synthesis of overweight elements. The study of thermonuclear fission is usually based on Bohr-Wheeler 's statistical fission theory. The study of the statistical model depends heavily on the phenomenological energy level density and potential energy surface. Therefore, an energy density functional theory based on microcosmic finite temperature is proposed to calculate the fission lifetime of the thermonuclear. The temperature dependent fission barrier height, curvature and collective mass parameters can be calculated microscopically and consistently. Based on the virtual free energy method, the fission life from low temperature to high temperature can be given by a unified framework. The importance of temperature-dependent fission barrier in fission research is demonstrated and the prospect of microcosmic description of thermonuclear fission is discussed.
【作者单位】： 北京大学物理学院核物理与核技术国家重点实验室;
【基金】：National Natural Science Foundation of China(11375016,11522538) Doctoral Program of Higher Education of China(20130001110001)~~
【分类号】：O571.43
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