2007年 第24卷 第4期
2007, 24(4): 253-257.
doi: 10.11804/NuclPhysRev.24.04.253
摘要:
研究夸克的质量是QCD研究中的一个非常重要问题。因为, 夸克质量是标准模型的基本输入参数, 准确地确定这些参数无论对于唯象的应用还是对于理论的应用都是极其重要的。基于参数化的完全穿衣服的夸克传播子, 研究了自能函数和夸克的动力学质量。理论预言了夸克质量和自能函数, 其结果与文献中的经验值相符合, 也与DysonSchwinger方程解一致。反过来这也说明了参数化的夸克传播子是成功和可靠的。Study of mass of quark is one of the most important issues in the investigation of QCD. Because masses of quarks are fundamental QCD input parameters of standard Model, and an accurate determination of these parameters is extremely important for both phenomenological and theoretical applications. Based on the parameterized fully dressed quark propagator proposed by us, the theoretical predictions of the masses of quarks are predicted in this short note. The effective quark mass is defined by the scalar selfenergy function Bf(p2) and vector selfenergy function Af(p2). The results of our calculations are in agreement with the empirical values used widely in literature and also show that the parameterized form of quark propagator is an applicable and reliable approximation.
研究夸克的质量是QCD研究中的一个非常重要问题。因为, 夸克质量是标准模型的基本输入参数, 准确地确定这些参数无论对于唯象的应用还是对于理论的应用都是极其重要的。基于参数化的完全穿衣服的夸克传播子, 研究了自能函数和夸克的动力学质量。理论预言了夸克质量和自能函数, 其结果与文献中的经验值相符合, 也与DysonSchwinger方程解一致。反过来这也说明了参数化的夸克传播子是成功和可靠的。Study of mass of quark is one of the most important issues in the investigation of QCD. Because masses of quarks are fundamental QCD input parameters of standard Model, and an accurate determination of these parameters is extremely important for both phenomenological and theoretical applications. Based on the parameterized fully dressed quark propagator proposed by us, the theoretical predictions of the masses of quarks are predicted in this short note. The effective quark mass is defined by the scalar selfenergy function Bf(p2) and vector selfenergy function Af(p2). The results of our calculations are in agreement with the empirical values used widely in literature and also show that the parameterized form of quark propagator is an applicable and reliable approximation.
2007, 24(4): 258-260.
doi: 10.11804/NuclPhysRev.24.04.258
摘要:
利用以前提出的参数化的夸克传播子， 计算了夸克的真空凝聚值和QCD真空的张量感应率。 结果表明， 张量感应率对不同味道的夸克的依赖是很明显的， 而几乎不依赖于夸克的真空凝聚值的变化。 但夸克凝聚值却明显地与积分的截断值有关， 即依赖于微扰区与非微扰区的分界线， 在常用的积分截断值1—2 GeV2之间计算得到的夸克凝聚值与文献中常用的值及其他理论的预言值是一致的。 理论预言的张量感应率也与其他理论结果相一致。
利用以前提出的参数化的夸克传播子， 计算了夸克的真空凝聚值和QCD真空的张量感应率。 结果表明， 张量感应率对不同味道的夸克的依赖是很明显的， 而几乎不依赖于夸克的真空凝聚值的变化。 但夸克凝聚值却明显地与积分的截断值有关， 即依赖于微扰区与非微扰区的分界线， 在常用的积分截断值1—2 GeV2之间计算得到的夸克凝聚值与文献中常用的值及其他理论的预言值是一致的。 理论预言的张量感应率也与其他理论结果相一致。
2007, 24(4): 261-263.
doi: 10.11804/NuclPhysRev.24.04.261
摘要:
指出了研究夸克质量的重要性、 科学意义和夸克质量产生的机制。 用夸克传播子定义了夸克的质量， 进而讨论了夸克的有效质量。 最后指出了存在的问题和研究前景。
Importance， scientific significance of studying quark mass， and the production mechanisim of quark mass have been pointed out. The quark mass is defined by quark propagator and from this definition we calculate effective mass of quark. Finally we also point out some open problems and perspective of this research field.
指出了研究夸克质量的重要性、 科学意义和夸克质量产生的机制。 用夸克传播子定义了夸克的质量， 进而讨论了夸克的有效质量。 最后指出了存在的问题和研究前景。
Importance， scientific significance of studying quark mass， and the production mechanisim of quark mass have been pointed out. The quark mass is defined by quark propagator and from this definition we calculate effective mass of quark. Finally we also point out some open problems and perspective of this research field.
2007, 24(4): 264-267.
doi: 10.11804/NuclPhysRev.24.04.264
摘要:
基于SU(3)夸克模型， 用共振群方法研究了两种理论下的Σ-N相互作用， 得到了它们的相互作用非定域位以及Σ超子与3He壳心核的相互作用势， 并在此基础上计算了4ΣHe基态结合能。 计算结果表明， SU(3)夸克模型能较好地描述两种理论下的ΣN相互作用及Σ超子与3He壳心核的相互作用势， 同时由其得到的 4ΣHe基态结合能也与实验值基本相吻合。
基于SU(3)夸克模型， 用共振群方法研究了两种理论下的Σ-N相互作用， 得到了它们的相互作用非定域位以及Σ超子与3He壳心核的相互作用势， 并在此基础上计算了4ΣHe基态结合能。 计算结果表明， SU(3)夸克模型能较好地描述两种理论下的ΣN相互作用及Σ超子与3He壳心核的相互作用势， 同时由其得到的 4ΣHe基态结合能也与实验值基本相吻合。
2007, 24(4): 268-273.
doi: 10.11804/NuclPhysRev.24.04.268
摘要:
运用规范势分解理论研究了 DunneJackiwPiTrugenberger 模型中的自对偶方程， 得到一个静态的自对偶ChernSimons多涡旋解， 每个涡旋由5个参数描述。 发现了自对偶解与拓扑数之间的关系， 而拓扑数由Brouwer度与Hopf指标确定。 同时， 也研究了该涡旋解的磁通量的拓扑量子化。The selfdual equation and its solution in SU(2) DunneJackiwPiTrugenberger model has Been discussed with special ansatz for the Lie algebraic structures of su(2) and gauge potential decomposition. We obtainer a new concrete selfdual equation and found the relationship between SU(2) ChernSimons vortices and topological number which is determined by Hopf indices and Brouwer degrees of mapping. (two positions， one scale， one phase per vortex and one charge of each vortex) mvortices solutions are discribed by using 5m parameters. The quantization of flux is also studied in this case.
运用规范势分解理论研究了 DunneJackiwPiTrugenberger 模型中的自对偶方程， 得到一个静态的自对偶ChernSimons多涡旋解， 每个涡旋由5个参数描述。 发现了自对偶解与拓扑数之间的关系， 而拓扑数由Brouwer度与Hopf指标确定。 同时， 也研究了该涡旋解的磁通量的拓扑量子化。The selfdual equation and its solution in SU(2) DunneJackiwPiTrugenberger model has Been discussed with special ansatz for the Lie algebraic structures of su(2) and gauge potential decomposition. We obtainer a new concrete selfdual equation and found the relationship between SU(2) ChernSimons vortices and topological number which is determined by Hopf indices and Brouwer degrees of mapping. (two positions， one scale， one phase per vortex and one charge of each vortex) mvortices solutions are discribed by using 5m parameters. The quantization of flux is also studied in this case.
2007, 24(4): 274-279.
doi: 10.11804/NuclPhysRev.24.04.274
摘要:
基于路径积分的FaddeevSenjanovic量子化， 先将具有非阿贝尔ChernSimons拓扑项的SU(n)N=2超对称规范场系统量子化， 然后利用整体正则Noether定理得到了系统的总角动量， 在量子水平下导出了该系统的分数自旋性质， 并发现其分数自旋有来自非阿贝尔规范群分量的贡献。We quantize SU(n) N=2 supersymmetric gauge field system with nonAbelian ChernSimons topological term for constrained Hamilton system in framework of FaddeevSenjanovic path integral quantization, deduce the total angular momentum based on the global canonical Norther theorem at quantum level, obtain the fractional spin of this supersymmetric system, and find that this anomalous fractional spin has the contribution from the group superscript components.
基于路径积分的FaddeevSenjanovic量子化， 先将具有非阿贝尔ChernSimons拓扑项的SU(n)N=2超对称规范场系统量子化， 然后利用整体正则Noether定理得到了系统的总角动量， 在量子水平下导出了该系统的分数自旋性质， 并发现其分数自旋有来自非阿贝尔规范群分量的贡献。We quantize SU(n) N=2 supersymmetric gauge field system with nonAbelian ChernSimons topological term for constrained Hamilton system in framework of FaddeevSenjanovic path integral quantization, deduce the total angular momentum based on the global canonical Norther theorem at quantum level, obtain the fractional spin of this supersymmetric system, and find that this anomalous fractional spin has the contribution from the group superscript components.
2007, 24(4): 280-283.
doi: 10.11804/NuclPhysRev.24.04.280
摘要:
介绍了FAIR项目CR超导二极铁的线圈结构。 采用有限元分析方法， 对线圈的电磁力作用进行二维计算分析， 得到了线圈的二维位移变形和应力分布规律， 同时也分析计算了线圈、 线圈盒的三维受力以及位移形变， 为线圈盒和支撑结构的优化设计提供了参考依据。 Coil structure of CR superferric dipole for FAIR is presented in this paper. Finite Element Method(FEM) is used to calculate 2d magnetic force, displacement and stress distribution. 3d magnetic force and displacement of coil and coilcase are also analyzed, which shows that the design is fit for the desire result. Some results will be taken as a reference for further design.
介绍了FAIR项目CR超导二极铁的线圈结构。 采用有限元分析方法， 对线圈的电磁力作用进行二维计算分析， 得到了线圈的二维位移变形和应力分布规律， 同时也分析计算了线圈、 线圈盒的三维受力以及位移形变， 为线圈盒和支撑结构的优化设计提供了参考依据。 Coil structure of CR superferric dipole for FAIR is presented in this paper. Finite Element Method(FEM) is used to calculate 2d magnetic force, displacement and stress distribution. 3d magnetic force and displacement of coil and coilcase are also analyzed, which shows that the design is fit for the desire result. Some results will be taken as a reference for further design.
2007, 24(4): 284-288.
doi: 10.11804/NuclPhysRev.24.04.284
摘要:
为研究清凉寺窑汝瓷胎和张公巷窑青瓷胎的原料特征及来源， 选取37个清凉寺窑汝瓷胎样品(32个汝官瓷胎和5个汝民瓷胎)、 32个张公巷窑青瓷胎样品以及14个岩石样品， 用中子活化分析 （NAA）方法测得每个样品中的23种元素含量; 使用散布分析及主成分分析方法处理NAA数据。 结果表明: 元素Fe， Ce， Ba， Ta， Th， La， Sm和Cr可作为区分汝官瓷胎和张公巷窑青瓷胎原料产地的指纹元素； 汝官瓷胎原料产地较集中， 来源相对稳定； 清凉寺窑汝民瓷胎料产地与汝官瓷基本相同， 均为就地取材； 张公巷窑青瓷胎原料产地较为分散, 与汝官瓷不同， 但二者距离相近。
关
为研究清凉寺窑汝瓷胎和张公巷窑青瓷胎的原料特征及来源， 选取37个清凉寺窑汝瓷胎样品(32个汝官瓷胎和5个汝民瓷胎)、 32个张公巷窑青瓷胎样品以及14个岩石样品， 用中子活化分析 （NAA）方法测得每个样品中的23种元素含量; 使用散布分析及主成分分析方法处理NAA数据。 结果表明: 元素Fe， Ce， Ba， Ta， Th， La， Sm和Cr可作为区分汝官瓷胎和张公巷窑青瓷胎原料产地的指纹元素； 汝官瓷胎原料产地较集中， 来源相对稳定； 清凉寺窑汝民瓷胎料产地与汝官瓷基本相同， 均为就地取材； 张公巷窑青瓷胎原料产地较为分散, 与汝官瓷不同， 但二者距离相近。
关
2007, 24(4): 289-293.
doi: 10.11804/NuclPhysRev.24.04.289
摘要:
X射线照射人肝癌细胞HepG2， 照射后细胞存活随照射剂量增大明显下降。 流式细胞术分析， 不同剂量组照射后24 h均发生G2期阻滞。 照射后不同时间组的细胞周期分布也有不同， 照射后12 h， 有显著的S期延迟。 Western Blot 显示照射后24 h P53， MDM2， P21蛋白表达上升， 并有时间效应： P53在照射后24 h之内始终维持较高表达, MDM2和P21分别在照射后6和12 h的表达最高。 X射线照射通过影响P53及其相关蛋白的表达影响细胞周期。 HepG2 cells were irradiated with Xray at the doses of 0, 1.0, 2.0, 4.0 or 8.0 Gy and separately maintained in DMEM at 37 ℃ for 0, 6, 12 or 24 h. Colonyforming assay showed that cell survival decreased with the irradiation dose increasing. Cell cycle was detected by FACS, the arrest of S phase was found after 12 h irradiation and arrest of G2 phase took place at 24 h after all irradiation doses, which suggested that cell cycle distribution was different in groups gathered after different maintaining time. The results of Western blotting showed that the expression of P53, MDM2 and P21 increased more after irradiation than the control. The expression of P53 remained high at 24 h after irradiation, while the levels of MDM2 or P21 arrived at the highest at 6 h or 12 h after irradiation respectively. The expressions of P21 after irradiation were in corresponding with the cell cycle distribution in the groups of different maintaining time. In conclusion, irradiation change the distribution of cell cycle by effecting the expression of P53 and its related proteins.
X射线照射人肝癌细胞HepG2， 照射后细胞存活随照射剂量增大明显下降。 流式细胞术分析， 不同剂量组照射后24 h均发生G2期阻滞。 照射后不同时间组的细胞周期分布也有不同， 照射后12 h， 有显著的S期延迟。 Western Blot 显示照射后24 h P53， MDM2， P21蛋白表达上升， 并有时间效应： P53在照射后24 h之内始终维持较高表达, MDM2和P21分别在照射后6和12 h的表达最高。 X射线照射通过影响P53及其相关蛋白的表达影响细胞周期。 HepG2 cells were irradiated with Xray at the doses of 0, 1.0, 2.0, 4.0 or 8.0 Gy and separately maintained in DMEM at 37 ℃ for 0, 6, 12 or 24 h. Colonyforming assay showed that cell survival decreased with the irradiation dose increasing. Cell cycle was detected by FACS, the arrest of S phase was found after 12 h irradiation and arrest of G2 phase took place at 24 h after all irradiation doses, which suggested that cell cycle distribution was different in groups gathered after different maintaining time. The results of Western blotting showed that the expression of P53, MDM2 and P21 increased more after irradiation than the control. The expression of P53 remained high at 24 h after irradiation, while the levels of MDM2 or P21 arrived at the highest at 6 h or 12 h after irradiation respectively. The expressions of P21 after irradiation were in corresponding with the cell cycle distribution in the groups of different maintaining time. In conclusion, irradiation change the distribution of cell cycle by effecting the expression of P53 and its related proteins.
2007, 24(4): 294-298.
doi: 10.11804/NuclPhysRev.24.04.294
摘要:
重离子生物技术已引起人们的广泛关注， 植物育种是重离子生物技术研究和应用的热点之一。 简要介绍了重离子的基本特征和在育种应用中的优势， 综述了重离子辐射对植物分子、 细胞、 个体3个水平的诱变效应研究及重离子辐射育种取得的进展。
Heavy ion biotechnology has received much attention since the mid1980s, when the first mutagenic effect of heavy ion beams was found in rice. Since then, plant breeding is one of the focuses in heavy ion biotechnology. In this paper we outlined the recent developments in plant breeding by heavy ion beams. We introduced briefly the essential characteristics and superiority of heavy ion beams applied in plant breeding, and reviewed further the mutagenic research in three levels(e.g., molecular, cell and individual) of plants. At last, we summarized artificial mutants obtained in plants irradiated by heavy ion beams.
重离子生物技术已引起人们的广泛关注， 植物育种是重离子生物技术研究和应用的热点之一。 简要介绍了重离子的基本特征和在育种应用中的优势， 综述了重离子辐射对植物分子、 细胞、 个体3个水平的诱变效应研究及重离子辐射育种取得的进展。
Heavy ion biotechnology has received much attention since the mid1980s, when the first mutagenic effect of heavy ion beams was found in rice. Since then, plant breeding is one of the focuses in heavy ion biotechnology. In this paper we outlined the recent developments in plant breeding by heavy ion beams. We introduced briefly the essential characteristics and superiority of heavy ion beams applied in plant breeding, and reviewed further the mutagenic research in three levels(e.g., molecular, cell and individual) of plants. At last, we summarized artificial mutants obtained in plants irradiated by heavy ion beams.
2007, 24(4): 299-203.
doi: 10.11804/NuclPhysRev.24.04.299
摘要:
蒙特卡罗程序的计算速度与计算模型的体积大小有一定关联。 通过改变模体的厚度， 发现除在尾部有限范围内会出现差异外， 薄模体与厚模体的结果差别很小， 然而却可以获得模拟效率的指数性提升。 通过改变模体的宽度， 发现窄模体与宽模体相比， 只要宽度比照射野半影大， 对模拟效率的影响都很小； 而当宽度与照射野半影区重合时， 效率就有一定程度的提高， 同时对剂量结果影响很小。 将此研究结果用于临床头部实例， 获得了计算速度的显著提升。
蒙特卡罗程序的计算速度与计算模型的体积大小有一定关联。 通过改变模体的厚度， 发现除在尾部有限范围内会出现差异外， 薄模体与厚模体的结果差别很小， 然而却可以获得模拟效率的指数性提升。 通过改变模体的宽度， 发现窄模体与宽模体相比， 只要宽度比照射野半影大， 对模拟效率的影响都很小； 而当宽度与照射野半影区重合时， 效率就有一定程度的提高， 同时对剂量结果影响很小。 将此研究结果用于临床头部实例， 获得了计算速度的显著提升。
2007, 24(4): 304-208.
doi: 10.11804/NuclPhysRev.24.04.304
摘要:
描述了一种用于多叶准直器适形放疗的剂量计算方法。 在不同大小的方野和非规则野照射情况下, 将此方法得到的剂量分布与微分卷积法计算得到的剂量分布进行了精度验证。 结果表明， 这种算法具有较高的剂量精度和较快的计算速度, 因此可在适形放疗中用作MLC适形野的自动生成。 A dose calculation algorithm for MLC based conformal radiotherapy is described in this paper. The algorithm is formulated by the coordinate of MLC leaves. Verification on the algorithm is made by comparing the dose distributions generated by this algorithm with that generated by a Differential Convolution Superposition algorithm for various regular and irregular fields. The results demonstrate that the present algorithm has suitable accuracy and high computational efficiency, thus it could be useful for the treatment planning process in MLC based conformal radiotherapy, where the workload for interactively or automatically designing the shapes of MLC is heavy.
描述了一种用于多叶准直器适形放疗的剂量计算方法。 在不同大小的方野和非规则野照射情况下, 将此方法得到的剂量分布与微分卷积法计算得到的剂量分布进行了精度验证。 结果表明， 这种算法具有较高的剂量精度和较快的计算速度, 因此可在适形放疗中用作MLC适形野的自动生成。 A dose calculation algorithm for MLC based conformal radiotherapy is described in this paper. The algorithm is formulated by the coordinate of MLC leaves. Verification on the algorithm is made by comparing the dose distributions generated by this algorithm with that generated by a Differential Convolution Superposition algorithm for various regular and irregular fields. The results demonstrate that the present algorithm has suitable accuracy and high computational efficiency, thus it could be useful for the treatment planning process in MLC based conformal radiotherapy, where the workload for interactively or automatically designing the shapes of MLC is heavy.
2007, 24(4): 309-402.
doi: 10.11804/NuclPhysRev.24.04.309
摘要:
利用傅立叶转换红外光谱和Raman谱仪分析了0.98 GeV的Fe离子在电子能损Se为3.5 keV/nm时， 不同辐照剂量（5×1010 —8×1013 ions/cm2)下， 在C60薄膜中引起的辐照损伤效应。 分析表明， Fe离子辐照引起了C60分子的聚合与损伤。 在辐照剂量达到一中间值1×1012 ions/cm2， C60分子的损伤得到部分恢复， 归因于电子激发引起的退火效应。 通过对Raman数据的拟合分析， 演绎出Fe离子辐照在C60材料中形成的潜径迹截面或引起损伤的截面约为1.32×10-14 cm2。
利用傅立叶转换红外光谱和Raman谱仪分析了0.98 GeV的Fe离子在电子能损Se为3.5 keV/nm时， 不同辐照剂量（5×1010 —8×1013 ions/cm2)下， 在C60薄膜中引起的辐照损伤效应。 分析表明， Fe离子辐照引起了C60分子的聚合与损伤。 在辐照剂量达到一中间值1×1012 ions/cm2， C60分子的损伤得到部分恢复， 归因于电子激发引起的退火效应。 通过对Raman数据的拟合分析， 演绎出Fe离子辐照在C60材料中形成的潜径迹截面或引起损伤的截面约为1.32×10-14 cm2。
2007, 24(4): 313-317.
doi: 10.11804/NuclPhysRev.24.04.313
摘要:
在ECPSSR理论的基础上， 利用OBKN近似描述电子俘获过程， 得到了包括电子俘获过程贡献的ECPSSR理论， 编写了相应的计算程序。 采用该程序计算了不同电荷态离子与多种靶原子碰撞的电子俘获截面和相应的X 射线产生截面， 将计算得到的包含电子俘获过程贡献的X 射线产生截面与实验结果进行了比较。 对于具有满K壳层的入射离子碰撞， X 射线产生截面与入射离子电荷态基本无关； 对于以直接电离为主导的碰撞过程， 计算得到的X 射线产生截面与实验数据符合得很好； 对于全裸和单K空穴入射离子的碰撞， 计算高估了X 射线产生截面。
Based on the ECPSSR theory, the contribution of the electron capture is described by the OBKN theory. The cross sections of electron capture and X ray production for the collision of different charge state projectiles with various targets are calculated, and compared with the available experimental data. It is found that the obtained X ray production cross sections are almost independent of the projectile charge states for projectiles without a K vacancy. For the collision processes of direct ionization, the present calculated results agree well with the experimental data. The calculations overestimate the X ray production cross sections for the projectiles with full and a K vacancy.
在ECPSSR理论的基础上， 利用OBKN近似描述电子俘获过程， 得到了包括电子俘获过程贡献的ECPSSR理论， 编写了相应的计算程序。 采用该程序计算了不同电荷态离子与多种靶原子碰撞的电子俘获截面和相应的X 射线产生截面， 将计算得到的包含电子俘获过程贡献的X 射线产生截面与实验结果进行了比较。 对于具有满K壳层的入射离子碰撞， X 射线产生截面与入射离子电荷态基本无关； 对于以直接电离为主导的碰撞过程， 计算得到的X 射线产生截面与实验数据符合得很好； 对于全裸和单K空穴入射离子的碰撞， 计算高估了X 射线产生截面。
Based on the ECPSSR theory, the contribution of the electron capture is described by the OBKN theory. The cross sections of electron capture and X ray production for the collision of different charge state projectiles with various targets are calculated, and compared with the available experimental data. It is found that the obtained X ray production cross sections are almost independent of the projectile charge states for projectiles without a K vacancy. For the collision processes of direct ionization, the present calculated results agree well with the experimental data. The calculations overestimate the X ray production cross sections for the projectiles with full and a K vacancy.
2007, 24(4): 318-322.
doi: 10.11804/NuclPhysRev.24.04.318
摘要:
假设超晶格“折沟道”对粒子的作用等效为形状相似的周期调制； 引入正弦平方势， 在小振幅近似下， 把粒子运动方程化为具有双频激励的Duffing方程。 用Melnikov方法分析了系统的混沌行为。 结果表明， 当外场为双频激励时， 系统将存在不同的次谐和超次谐分叉序列。 由于系统的混沌行为与系统参数有关， 于是， 只需控制材料组分、 或掺杂浓度， 就可望达到避免或控制混沌的目的， 为半导体超晶格的制备及其光磁电效应提供了理论分析。
假设超晶格“折沟道”对粒子的作用等效为形状相似的周期调制； 引入正弦平方势， 在小振幅近似下， 把粒子运动方程化为具有双频激励的Duffing方程。 用Melnikov方法分析了系统的混沌行为。 结果表明， 当外场为双频激励时， 系统将存在不同的次谐和超次谐分叉序列。 由于系统的混沌行为与系统参数有关， 于是， 只需控制材料组分、 或掺杂浓度， 就可望达到避免或控制混沌的目的， 为半导体超晶格的制备及其光磁电效应提供了理论分析。
2007, 24(4): 323-327.
doi: 10.11804/NuclPhysRev.24.04.323
摘要:
在三温聚变燃烧点模型框架下， 对比氘氚聚变燃烧过程中α粒子能量逐步沉积与瞬时沉积两种描述下等离子体的温度、 离子数密度随时间的变化， 针对不同的密度条件做了计算， 考察了α粒子慢化过程对氘氚聚变点火的影响。 发现考虑了α粒子的慢化过程后， 峰值温度时刻延迟出现， 电子和离子的峰值温度都有所降低。 在相同的初始温度条件下， α粒子的慢化效应在较低的密度条件下对点火有更大的影响。A threetemperature thermonuclear burn model considering the slowingdown effect of alpha particles is presented, with which the temporal evolution of temperature and particle number density are calculated. Comparison with the description that alpha particles deposit their energy instantaneously, calculation shows that the slowingdown effect of alpha particles delays ignition time, makes the maximum of electron and ion temperatures lower and is more remarkable for lower density conditions.
在三温聚变燃烧点模型框架下， 对比氘氚聚变燃烧过程中α粒子能量逐步沉积与瞬时沉积两种描述下等离子体的温度、 离子数密度随时间的变化， 针对不同的密度条件做了计算， 考察了α粒子慢化过程对氘氚聚变点火的影响。 发现考虑了α粒子的慢化过程后， 峰值温度时刻延迟出现， 电子和离子的峰值温度都有所降低。 在相同的初始温度条件下， α粒子的慢化效应在较低的密度条件下对点火有更大的影响。A threetemperature thermonuclear burn model considering the slowingdown effect of alpha particles is presented, with which the temporal evolution of temperature and particle number density are calculated. Comparison with the description that alpha particles deposit their energy instantaneously, calculation shows that the slowingdown effect of alpha particles delays ignition time, makes the maximum of electron and ion temperatures lower and is more remarkable for lower density conditions.
2007, 24(4): 328-332.
doi: 10.11804/NuclPhysRev.24.04.328
摘要:
简要地分析了利用核爆氘氘聚变能发电的可行性及优点， 按10 kt TNT核爆氘氘聚变的规模， 估算了热载体钠的储能作用及用量， 核爆冲击波对爆室壁的作用强度及爆室壁的承受能力。
简要地分析了利用核爆氘氘聚变能发电的可行性及优点， 按10 kt TNT核爆氘氘聚变的规模， 估算了热载体钠的储能作用及用量， 核爆冲击波对爆室壁的作用强度及爆室壁的承受能力。
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