FLUCTUATION-DISSIPATION DYNAMICS OF FUSIOIN REACTION IN SUPERHEAVY MASS REGION AND MULTI-MODAL FISSION REACTION

超重质量区聚变反应的涨落耗散动力学及多模态裂变反应

基本信息

项目摘要

We have studied the fusion reaction in superheavy mass region and the multi-modal fission reaction in actinide region on the basis of the fluctuation-dissipation dynamics. A multi-dimensional Langevin equation has been used for numerical calculations.The four-dimensional Langevin equation is used to study the formation of superheavy nuclei after the contact of two ions. We pointed out the importance of the neck degree of freedom in the very early stage of the contact, because it has very small inertia.We have studied the multi-modal fission of actinide nuclei. We have examined the effect of the nuclear friction coefficient in the mass and kinetic energy distribution of the fragments. We pointed out that it is important to fit several physical quantities at the same time when we derive the nuclear friction coefficient.For the approaching phase, we have calculated the capture probability taking into account of the deformation and the orientation of the two ions. We pointed out that the original strength of the surface friction that was determined in deep inelastic collision may need to be reexamined for the study of the fusion process.We have studied the properties of the Langevin equation as a stochastic differential equation (SDE). In the integration of SDE, there are several ways of interpreting the stochastic integrals, for example Ito integral and Stratonovich integral. We compared the numerical results for fusion and fission process with two interpretations.We have also performed the systematic study of the fission barrier for neutron-rich nuclei. We applied it to estimate the element abundance in r-process nucleosynthesis. We pointed out the importance of the mass-asymmetric fission process. In the actinide region where the fission process takes place, the mass-asymmetric fission is dominant and the mass division is essentially determined by the shell correction in the potential energy surface.
在涨落耗散动力学的基础上,我们研究了超重质区的聚变反应和氡系元素区的多模裂变反应。用多维朗之万方程进行了数值计算,用四维朗之万方程研究了两离子接触后超重原子核的形成。指出了颈部自由度在接触初期的重要性,因为它具有很小的惯性。我们研究了鳗系元素核的多模裂变。我们研究了核摩擦系数对碎片质量和动能分布的影响。我们指出,在推导核摩擦系数时,同时拟合多个物理量是很重要的。对于临近的阶段,我们考虑了两个离子的形变和取向,计算了俘获几率。我们指出,在深部非弹性碰撞中确定的表面摩擦力的原始强度可能需要重新检验,以便研究融合过程。我们研究了朗之万方程作为随机微分方程(SDE)的性质。在随机微分方程的积分中,有几种解释随机积分的方法,如Ito积分和Stratonovich积分。我们对聚变和裂变过程的数值结果进行了比较,并对丰中子核的裂变势垒进行了系统的研究。我们将其应用于r-过程核合成中元素丰度的估算。指出了质量不对称裂变过程的重要性。在发生裂变过程的氡系元素区,质量不对称裂变占主导地位,质量分配本质上由势能面上的壳层修正决定。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
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A Reassessment of Surface Friction Model for Maximum Cold Fusion Reactions in Superheavy in Superheavy Mass Region
超重质量区超重最大冷聚变反应表面摩擦模型的重新评估
A reassessment of surface friction model for maximum cold fusion reactions in superheavy mass region
超重质量区最大冷聚变反应表面摩擦模型的重新评估
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    A. Fukushima;T. Wada;et. al.
  • 通讯作者:
    et. al.
A dynamical calculation of multi-modal nuclear fission
多模态核裂变的动力学计算
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    T. Wada;A. Fukushima;M. Ohta;Wada Takahiro;Takahiro Wada;T. Wada
  • 通讯作者:
    T. Wada
Fission Modes of Neutron-Rich Nuclei in the r-Process Nucleosynthesis
r过程核合成中富中子核的裂变模式
Fission Fragment Mass Distribution for Nuclei in the r-Process Region
r 过程区域中原子核的裂变碎片质量分布
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WADA Takahiro其他文献

WADA Takahiro的其他文献

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{{ truncateString('WADA Takahiro', 18)}}的其他基金

A new mathematical model for biological effects of radiation
辐射生物效应的新数学模型
  • 批准号:
    16H04637
  • 财政年份:
    2016
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Analysis of Biomaterials by Spatially Resolved X-ray Fluorescence and X-ray Absorption Fine Structure
通过空间分辨 X 射线荧光和 X 射线吸收精细结构分析生物材料
  • 批准号:
    15K20426
  • 财政年份:
    2015
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Nondestructive Analysis of Tooth - Adhesive Interfaces by Surface Sensitive XAFS.
通过表面敏感 XAFS 对牙齿-粘合界面进行无损分析。
  • 批准号:
    24890061
  • 财政年份:
    2012
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Research Activity Start-up
Dynamical Study of Scission Neutrons and Fragment Mass Distribution in Nuclear Fission
核裂变中裂变中子和碎片质量分布的动力学研究
  • 批准号:
    24540289
  • 财政年份:
    2012
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Inertia Matching of Trans-femoral Prosthesis based on Effective Use of Its Inertia Property
有效利用股骨假体惯性特性的惯性匹配
  • 批准号:
    22760189
  • 财政年份:
    2010
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Effect of In-Vehicle Operation Task on Driving Behaviors of Automobole
车内操作任务对汽车驾驶行为的影响
  • 批准号:
    19760177
  • 财政年份:
    2007
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
HIP Sintering of Diamond-Silicon Carbide Composite and its Application to the Carbide Tools
金刚石-碳化硅复合材料的热等静压烧结及其在硬质合金刀具中的应用
  • 批准号:
    12555182
  • 财政年份:
    2000
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
FLUCUATION-DISSIPATION DYNAMICS IN THE FUSION-FISSION REACTION OF MASSIVE NUCLEI
大质量核聚变裂变反应中的涨落耗散动力学
  • 批准号:
    10640287
  • 财政年份:
    1998
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
DISSIPATIVE DYNAMICS OF HEAVY-ION FUSION-FISSION REACTION
重离子聚变裂变反应的耗散动力学
  • 批准号:
    08640398
  • 财政年份:
    1996
  • 资助金额:
    $ 2.36万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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