Nuclear Reactions in High Density Plasmas and Low Energy Nuclear Physics

高密度等离子体中的核反应和低能核物理

• 批准号: 02452276
• 负责人: MIMA Kunioki
• 金额: $ 1.6万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452276/
• 关键词: High Density Plasma; Fusion Reaction; Laser Implosion; HNC Equation; Ion-Ion Correlation; Thomas-Fermi Model; Reaction Cross Section; Electron Shielding; ト-マスフェルミモデル; 核融合; レ-ザ-プラズマ; 恒星; 核反応断面積; スクリ-ニング; イオン間動径分布関数; 強結合プラズマ; ト-マス・フエルミモデル

Since the nuclear reaction cross sections are very small in extremely low energy regime, they have not been investigated both in experiment and theory. Recently, fusion reactions of deuterium were observed in low temperature laser implosion plasmas and colliding D_2O pellets of which temperature is typically 100eV-1keV. In order to analyze the experimental results, we investigated the high density effects on the nuclear fusion reactions in strongly coupled high density plasmas. Actually, enhancement of fusion reaction rate in high density two component plasmas which consist of deuterium (D) and high Z material such as carbon (C) or titanium (Ti) has been investigated theoretically. Ion-ion correlation in high density two component plasmas is described by hyper-netted chain (HNC) equation with electron shielding. To take into account the shielding by bound electrons, the degree of ionization of the materials is calculated simultaneously with HNC equation by using Thomas-Fermi model. The results show that the fusion reaction rate of D-D interaction is enhanced by a factor from 2 to 4 because high Z ions squeeze D ions into a small volume to increase collision rate of D ions.

由于极低能区的核反应截面很小，无论是在实验上还是在理论上都没有得到研究。近年来，在低温激光内爆等离子体和D_2O小球碰撞过程中观察到了氘的聚变反应，其典型温度为100 eV-1 keV。为了分析实验结果，我们研究了强耦合高密度等离子体中高密度效应对核聚变反应的影响。实际上，在由氘（D）和高Z材料（如碳（C）或钛（Ti））组成的高密度双组分等离子体中，聚变反应速率的增强已被理论研究。用考虑电子屏蔽的超网链（HNC）方程描述了高密度双组分等离子体中的离子-离子关联。考虑到束缚电子对材料的屏蔽作用，采用HNC方程，利用HNC模型计算了材料的电离度。结果表明，由于高Z离子将D离子挤压到较小的体积内，使D离子的碰撞速率增大，D-D相互作用的熔合反应速率提高了2 ~ 4倍。

项目成果

田口 俊弘,安波 利明,三間 圀興: "Selbーconsistent Analysis of Atomic State and Density Correlation Functions of Partially Ionized High Density Plasmas and Enhancement of Fusion Reaction" Physical Reuiew A.(1992)

Toshihiro Taguchi、Toshiaki Anba、Kuniyuki Mima：“部分电离高密度等离子体的原子态和密度相关函数的自相一致分析以及聚变反应的增强”Physical Reuiew A. (1992)

Toshihiro Taguchi, Toshiaki Yasunami, and Kunioki Mima: "Self-consistent Analysis of Atomic State and Density Correlation Functions of Partially Ionized High Density Plasma and Enhancement of Fusion Reaction Rate" Physical Review A. (1992)

Toshihiro Taguchi、Toshiaki Yasunami 和 Kunioki Mima：“部分电离高密度等离子体的原子态和密度相关函数的自洽分析以及聚变反应速率的增强”物理评论 A. (1992)

田口 俊弘,三間 圀興,安波 利明: "SelfーConsistent Analysis of Atomic State and Density Correlation Functions of Partially Ionized High Density Plasmas and Enhancement of Fusion Reaction" 米国物理学会 Physical Review A.

Toshihiro Taguchi、Kuniyuki Mima、Toshiaki Anba：“部分电离高密度等离子体的原子态和密度相关函数的自洽分析以及聚变反应的增强”美国物理学会物理评论A。