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Alternative pairwise nuclear fusion optimization algorithm in arbitrarily weighted particle-in-cell simulations 认领 引用
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作者 Qian Dong Chao-Zhi Li +4 位作者 Chen Xie Zhi-Dong Chen De-Bin Zou Wen Luo Tong-Pu Yu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第6期247-256,共10页
An optimization algorithm for pairwise nuclear fusion with arbitrarily weighted macroparticles is proposed and demonstrated using particle-in-cell(PIC)simulations.A faster computation of the Coulomb collision operator... An optimization algorithm for pairwise nuclear fusion with arbitrarily weighted macroparticles is proposed and demonstrated using particle-in-cell(PIC)simulations.A faster computation of the Coulomb collision operator is achieved compared with that obtained through the classical nuclear fusion algorithm.Thus,the proposed algorithm can be implemented in the PIC simulation code with marginal effort.The algorithm is benchmarked in scenarios with like-particles,D(d,n)3He,unlikeparticles,D(t,n)4He,thermonuclear fusion,and beam-target fusion.Moreover,the CPU time could be reduced significantly without reducing the simulation accuracy. 展开更多
关键词 Particle-in-cell simulation Nuclear fusion Coulomb collision Binary collision
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耧车过处,三行齐发 春分 大地按下“快进键” 认领 引用
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作者 刘志斌 《国家人文历史》 2026年第3期28-33,共6页
氢核靠近了另一个氢核。库伦斥力让它们的接近变得艰难而迟滞,但极端的高温与高压依旧驱使着它们越来越近。终于在某个刹那,强核力接管了它们的命运,将两者锻成一体,耀目之光由此迸发。而随着无数氢核不断重复这个过程,澎湃的光与热最... 氢核靠近了另一个氢核。库伦斥力让它们的接近变得艰难而迟滞,但极端的高温与高压依旧驱使着它们越来越近。终于在某个刹那,强核力接管了它们的命运,将两者锻成一体,耀目之光由此迸发。而随着无数氢核不断重复这个过程,澎湃的光与热最终汇成汹涌的洪流,喷薄而出,向虚空铺展。 展开更多
关键词 高温 高压 强核力 库伦斥力 光与热 氢核
Dynamics of near-barrier fusion reactions:antisymmetrized molecular dynamics modeling of 6Li+13C and 7Li+12C 认领 引用
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作者 Mei-Rong Huang Su-Ya-La-Tu Zhang +3 位作者 De-Xing Wang Dan-Dan Niu Guo Li Hao-Chun Yu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2025年第12期273-282,共10页
The fusion dynamics of 6Li and 7Li projectiles incident on the 13C and 12C targets,respectively,near the Coulomb barrier,were investigated theoretically using the antisymmetrized molecular dynamics(AMD)mod... The fusion dynamics of 6Li and 7Li projectiles incident on the 13C and 12C targets,respectively,near the Coulomb barrier,were investigated theoretically using the antisymmetrized molecular dynamics(AMD)model.Within the AMD framework,the ground-state configurations of 6Li and 7Li exhibit pronounced deformation characterized by well-developed d+α and t+α clustering structures,respectively.Reaction simulations were performed across a center-of-mass energy range of 3−7.6MeV,encompassing the fusion barrier region.The total fusion cross sections computed as a function of collision energy demon-strate favorable quantitative agreement with the experimental values at energies above the Coulomb barrier.Additionally,a detailed comparison was made of the partial cross sections into specific residual fragments predicted by AMD at different center-of-mass energies.The AMD model provides a robust microscopic description of light-heavy-ion fusion dynamics and captures the role of extended density distributions and cluster correlations within interacting nuclei. 展开更多
关键词 Fusion reaction Near-barrier Dynamics AMD Cluster structure
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Predictions of complete fusion cross‑sections of 6,7Li,9Be,and 10B using a Bayesian neural network method 认领 引用
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作者 Kai‑Xuan Cheng Rong‑Xing He +1 位作者 Chun‑Yuan Qiao Chun‑Wang Ma 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2025年第10期169-175,共7页
A machine learning approach based on Bayesian neural networks was developed to predict the complete fusion cross-sections of weakly bound nuclei.This method was trained and validated using 475 experimental data points... A machine learning approach based on Bayesian neural networks was developed to predict the complete fusion cross-sections of weakly bound nuclei.This method was trained and validated using 475 experimental data points from 39 reaction systems induced by 6,7Li,9Be,and 10B.The constructed Bayesian neural network demonstrated a high degree of accuracy in evaluating complete fusion cross-sections.By comparing the predicted cross-sections with those obtained from a single-barrier penetration model,the suppression effect of 6,7Li and 9Be with a stable nucleus was systematically analyzed.In the cases of 6Li and 7Li,less suppression was predicted for relatively light-mass targets than for heavy-mass targets,and a notably distinct dependence relationship was identified,suggesting that the predominant breakup mechanisms might change in different mass target regions.In addition,minimum suppression factors were predicted to occur near target nuclei with neutron-closed shell. 展开更多
关键词 Fusion reaction Weakly bound nuclei Machine learning Bayesian neural network
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Trajectory tracking on the optimal path of two-dimensional quadratic barrier escaping 认领 引用
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作者 Zengxuan Zhao Xiuying Zhang +4 位作者 Pengchen Zhao Chunyang Wang Chunlei Xia Mushtaq Rana Imran Joelous Malamula Nyasulu 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第5期92-95,共4页
The diffusion trajectory of a Brownian particle passing over the saddle point of a two-dimensional quadratic potential energy surface is tracked in detail according to the deep learning strategies.Generative adversari... The diffusion trajectory of a Brownian particle passing over the saddle point of a two-dimensional quadratic potential energy surface is tracked in detail according to the deep learning strategies.Generative adversarial networks(GANs)emanating in the category of machine learning(ML)frameworks are used to generate and assess the rationality of the data.While their optimization is based on the long short-term memory(LSTM)strategies.In addition to drawing a heat map,the optimal path of two-dimensional(2D)diffusion is simultaneously demonstrated in a stereoscopic space.The results of our simulation are completely consistent with the previous theoretical predictions. 展开更多
关键词 trajectory tracking optimal path two-dimensional barrier escaping deep learning
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The dynamical mechanism in the fusion reactions to synthesize neutron-defficient Pu isotopes 认领 引用
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作者 Zi-Long Wang Xiao-Ye Zhang +1 位作者 Gen Zhang Feng-Shou Zhang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2025年第11期295-305,共11页
Within the framework of the isospin-dependent quantum molecular dynamics model,the fusion cross section and fusion mechanism of neutron-deficient Pu isotopes in the reactions24,26,30Si+196Hg were investigated.We found... Within the framework of the isospin-dependent quantum molecular dynamics model,the fusion cross section and fusion mechanism of neutron-deficient Pu isotopes in the reactions24,26,30Si+196Hg were investigated.We found that the fusion cross sections are higher in the reaction with a more neutron-rich beam owing to the lower dynamical barrier.The dynamical barrier decreases with decreasing incident energy,which explains the fusion enhancement at the sub-barrier energy.The peak value of N/Z ratio in the neck region is the highest in reaction30Si+196Hg,indirectly leading to the lowest dynamical barrier.Compared with the proton density distribution,the neck region for neutrons is larger,indicating that neutrons transfer more quickly than protons,leading to a high N/Z ratio in the neck.The time distribution of the appearance of dynamical barriers is wider at lower incident energies,indicating that the fusion process took longer to exchange nucleons.The single-particle potential barrier decreases with time evolution and finally disappears at a lower impact parameter,which is favorable for fusion events. 展开更多
关键词 Fusion reaction Neutron-deficient isotopes Neck dynamics IQMD model
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Influence of polarization of hot nuclear matter on the anomaly of surface diffuseness of inter-nuclear potential 认领 引用
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作者 S Ramezani Sani R Gharaei H A Rahnamaye Aliabad 《Communications in Theoretical Physics》 SCIE CAS CSCD 2025年第3期75-84,共10页
The fusion excitation functions for 12 colliding systems with 96≤Z1Z2≤608 are analyzed using coupled-channel(CC)calculations based on the M3Y double-folding(DF)potential supplemented with a repulsive potential... The fusion excitation functions for 12 colliding systems with 96≤Z1Z2≤608 are analyzed using coupled-channel(CC)calculations based on the M3Y double-folding(DF)potential supplemented with a repulsive potential that takes into account the incompressibility of the nuclear matter.We also applied the polarization effects of hot nuclear matter(PEHNM)on the calculations of the bare nucleus-nucleus interaction potential within the framework of the modified density-dependent Seyler-Blanchard(SB)approach in the T2approximation.Our results reveal that we obtain a nice description of the experimental data of different fusion systems when we use the present theoretical approach to calculate the energy-dependent values of the fusion cross sections.In this paper,the influence of the PEHNM on the surface diffuseness parameter of the Woods-Saxon(WS)potential is also studied.In order to reach this goal,we extract the corresponding values of this parameter based on the modified form of the DF potential(M3Y+Repulsion+polarization).We find that the extracted values are located in a range between a=0.61 and 0.80 fm at different incident energies.It seems that the polarization effects of hot nuclear matter play a key role in describing the abnormally large values of the nuclear potential diffusenesses in the heavy-ion fusion reactions.Additionally,the regular decreasing trend for the diffuseness parameter of the nucleus-nucleus potential with the increase in the bombarding energies is also observed. 展开更多
关键词 Heavy-ion fusion reactions Seyler-Blanchard approach diffuseness parameter polarization effects
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超强超短脉冲激光诱发大尺度氘团簇聚变 认领 引用 被引量：5
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作者 刘红杰 郑志坚 +8 位作者 谷渝秋 王红斌 陈家斌 吴玉池 王磊 李镛周 南性模 韩载旻 杨朝文 《强激光与粒子束》 EI CAS 北大核心 2008年第12期2017-2021,共5页
利用低温脉冲气阀获得了平均含有3×103氘原子的氘团簇。在飞秒激光装置上实现了氘团簇聚变,每发中子产额为1×103。中子产额对激光功率密度敏感,保持激光能量不变,随着激光焦斑的变大,DD聚变中子产额逐渐增加,最大值出现在激... 利用低温脉冲气阀获得了平均含有3×103氘原子的氘团簇。在飞秒激光装置上实现了氘团簇聚变,每发中子产额为1×103。中子产额对激光功率密度敏感,保持激光能量不变,随着激光焦斑的变大,DD聚变中子产额逐渐增加,最大值出现在激光焦斑为470μm时;继续增大激光焦斑,没有观察到中子信号。实验结果还表明激光氘团簇聚变发生的区域主要是激光辐照的等离子体热区,此区域内邻近氘团簇库仑爆炸发射的高能氘离子碰撞引发聚变反应。 展开更多
关键词 超强超短脉冲激光 氘团簇聚变 中子 飞行时间 有质动力 等离子体
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An efficient method for mapping the 12C+12C molecular resonances at low energies 认领 引用 被引量：3
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作者 Xiao-Dong Tang Shao-Bo Ma +4 位作者 Xiao Fang Brian Bucher Adam Alongi Craig Cahillane Wan-Peng Tan 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2019年第8期77-83,共7页
The12C+12C fusion reaction is famous because of its complication of molecular resonances,and it plays an important role in both nuclear structural research and astrophysics.It is extremely difficult to measure t... The12C+12C fusion reaction is famous because of its complication of molecular resonances,and it plays an important role in both nuclear structural research and astrophysics.It is extremely difficult to measure the cross sections of12C+12C fusions at energies of astrophysical relevance because of the very low reaction yields.To measure the complicated resonant structure that exists in this important reaction,an efficient thick target method has been developed and applied for the first time at energies Ec.m.<5.3 MeV.A scan of the cross sections over a relatively wide range of energies can be carried out using only a single beam energy.The result of measurement at Ec.m.=4.1 MeV is compared with results from previous work.This method will be useful for searching for potentially existing resonances of 12C+12C in the energy range 1 MeV<Ec.m.<3 MeV. 展开更多
关键词 12C+12C Molecular resonance Thick targetmethod 12C(12C, p)^23Na
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Possibility of reaching the predicted center of the“island of stability”via the radioactive beam-induced fusion reactions 认领 引用 被引量：4
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作者 Ming-Hao Zhang Ying Zou +3 位作者 Mei-Chen Wang Gen Zhang Qing-Lin Niu Feng-Shou Zhang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第9期186-195,共10页
Based on the dinuclear system model,the synthesis of the predicted double-magic nuclei298Fl and 304120 was investigated via neutron-rich radioactive beam-induced fusion reactions.The reaction58Ca+244Pu is pre... Based on the dinuclear system model,the synthesis of the predicted double-magic nuclei298Fl and 304120 was investigated via neutron-rich radioactive beam-induced fusion reactions.The reaction58Ca+244Pu is predicted to be favorable for producing298Fl with a maximal ER cross section of 0.301 pb.Investigations of the entrance channel effect reveal that the244Pu target is more promising for synthesizing298Fl than the neutron-rich targets248Cm and249Bk,because of the influence of the Coulomb barrier.For the synthesis of 304120,the maximal ER cross section of 0.046 fb emerges in the reaction58V+249Bk,indicating the need for further advancements in both experimental facilities and reaction mechanisms. 展开更多
关键词 Superheavy nuclei Dinuclear system model Fusion reaction Double-magic nucleus Radioactive beam
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核聚变中的核物理问题 认领 引用 被引量：4
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作者 李兴中 刘斌 +1 位作者 魏清明 任贤哲 《核聚变与等离子体物理》 EI CAS 北大核心 2004年第1期29-32,共4页
采用标准的量子力学方位阱加库伦位垒,计算了氘 氚聚变截面。给出了0.2～280keV能区内的截面数据,与实验符合得很好。此模型说明了不可用Breit Wigner公式来讨论轻核聚变反应。将此模型运用于束缚态带电粒子之间的核反应,可以解释一系列... 采用标准的量子力学方位阱加库伦位垒,计算了氘 氚聚变截面。给出了0.2～280keV能区内的截面数据,与实验符合得很好。此模型说明了不可用Breit Wigner公式来讨论轻核聚变反应。将此模型运用于束缚态带电粒子之间的核反应,可以解释一系列"异常现象",并展现了开发不带强放射性的聚变能的前景。 展开更多
关键词 核聚变 量子力学 氘-氘聚变截面 轻核聚变反应 选择性共振隧穿模型 气泡聚变 凝聚态核科学
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Effects of Isospin Equilibrium on Cold Fusion of Superheavy Nuclei 认领 引用 被引量：10
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作者 刘祖华 包景东 《Chinese Physics Letters》 SCIE EI CAS 2005年第12期3044-3047,共4页
The neutron flow model predicts that neutrons start to flow freely between the approaching nuclei ^58Fe and ^208 pb at s=3fm, a length in which the effective surfaces of these nuclei are 3 fm apart. As a result of neu... The neutron flow model predicts that neutrons start to flow freely between the approaching nuclei ^58Fe and ^208 pb at s=3fm, a length in which the effective surfaces of these nuclei are 3 fm apart. As a result of neutron flow, the N/Z value rapidly reaches an equilibrium distribution. Meanwhile the system, originally in the fusion valley, is injected into the asymmetric fission valley. The dynamic process of the composite nucleus in the asymmetric fission valley is treated with a two-parameter Smoluchowski equation. It is shown that the probability to overcome the asymmetric fission barrier and to achieve compound nucleus configuration, hence the fusion cross section is obviously suppressed due to the effect of isospin equilibrium. 展开更多
关键词 CROSS-SECTIONS SUBBARRIER FUSION HEAVIEST NUCLEI CHANNEL ENERGIES BARRIER Z=114
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Deuterium Clusters Fusion Induced by the Intense Femtosecond Laser Pulse 认领 引用 被引量：2
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作者 刘红杰 郑志坚 +13 位作者 谷渝秋 张保汉 李镛周 南性模 韩载旻 李勇雨 芮权海 陈家斌 王红斌 焦春晔 何颖玲 温天舒 温贤仑 陈铭 《Chinese Physics Letters》 SCIE EI CAS 2007年第2期494-496,共3页
Neutrons （2.45MeV） from deuterium cluster fusion induced by the intense femtosecond （3Ors） laser pulse are experimentally demonstrated. The average neutron yield 103 per shot is obtained. It is found that the yiel... Neutrons （2.45MeV） from deuterium cluster fusion induced by the intense femtosecond （3Ors） laser pulse are experimentally demonstrated. The average neutron yield 103 per shot is obtained. It is found that the yield slightly increases with the increasing laser spot size. No neutron can be observed when the laser intensity I 〈 4.3 × 10^15 W/cm^2. 展开更多
关键词 HIGH-ENERGY IONS NUCLEAR-FUSION ELECTRON GENERATION ATOMIC CLUSTERS JET EXPLOSIONS EMISSION
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常温核聚变现象实验研究 认领 引用 被引量：5
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作者 王大伦 陈素和 +3 位作者 励义俊 傅依备 张信威 张武寿 《强激光与粒子束》 EI CAS 1993年第3期333-343,共11页
介绍了1989～1992年在常温核聚变研究方面的主要进展。使用电解法观测到了中子和氚。使用气体放电法观测到了中子和X射线。使用气体升降温度压力循环法观测到了X光胶片感光现象,并初步弄清了感光原因。
关键词 电解 放电 聚变反应 常温聚变
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冷核聚变十五年 认领 引用 被引量：2
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作者 江兴流 刘锐 +3 位作者 王怀义 乐小云 韩丽君 文雄伟 《原子核物理评论》 CAS 北大核心 2004年第4期422-424,共3页
参考在美国麻省理工学院召开的第十届国际冷核聚变会议(ICCF 10)内容,对冷核聚变研究的现状作一简单介绍.国际原子能委员会(IAEA)分管聚变的官员(1995—2001年)T.J.Dolan在清华召开的ICCF 9国际会议上的总结会上提出五种重要的解释冷聚... 参考在美国麻省理工学院召开的第十届国际冷核聚变会议(ICCF 10)内容,对冷核聚变研究的现状作一简单介绍.国际原子能委员会(IAEA)分管聚变的官员(1995—2001年)T.J.Dolan在清华召开的ICCF 9国际会议上的总结会上提出五种重要的解释冷聚变现象的理论模型,其中有江兴流提出的涡旋动力学模型.涡旋动力学模型的主要论点在于:局域瞬态非平衡体系产生涡旋,而涡旋的内聚作用和极化效应,使体系内的粒子相互靠近,产生局域极化核反应和高度定向的轴向加速高能粒子.这种局域瞬态非平衡体系出现在电极微突起处或多层膜的非平衡点处.这一理论成功地解释了许多异常放热和核嬗变现象,因而受到了广泛重视.对涡旋动力学作以简单介绍. 展开更多
关键词 冷核聚变 非平衡 冷聚变 突起 核反应 多层膜 放热 涡旋 高能粒子 异常
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液氘Hugoniot曲线的理论计算 认领 引用 被引量：2
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作者 陈其峰 蔡灵仓 +1 位作者 陈栋泉 经福谦 《高压物理学报》 EI CAS 北大核心 2002年第1期61-64,共4页
用液体变分微扰理论加量子力学修正和指数 6 (EXP 6 )相互作用势 ,计算了液氘的一次和二次冲击压力为 0～ 80GPa范围Hugoniot曲线。计算结果表明 :冲击压力与实验符合较好。但冲击温度明显高于实验值 ,对其偏高的原因进行了探讨。
关键词 液氘 Hugoniot曲线 理论计算 冲击温度 指数6(EXP-6)势 冲击压力 冲击压缩特性 高温高压实验 量子力学修正
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Neutron and Proton Diffusion in Fusion Reactions for the Synthesis of Superheavy Nuclei 认领 引用 被引量：2
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作者 黄明辉 甘再国 +2 位作者 冯兆庆 周小红 李君清 《Chinese Physics Letters》 SCIE EI CAS 2008年第4期1243-1246,共4页
The restriction of the one dimensional （1D） master equation （ME） with the mass number of the projectile-like fragment as a variable is studied, and a two-dimensional （2D） master equation with the neutron and pro... The restriction of the one dimensional （1D） master equation （ME） with the mass number of the projectile-like fragment as a variable is studied, and a two-dimensional （2D） master equation with the neutron and proton numbers as independent variables is set up, and solved numerically. Our study showed that the 2D ME can describe the fusion process well in all projectile target combinations. Therefore the possible channels to synthesize super-heavy nuclei can be studied correctly in wider possibilities. The available condition for employing 1D ME is pointed out. 展开更多
关键词 supernova explosion proto-neutron star shock wave
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Effect of superstrong magnetic fields on thermonuclear reaction rates on the surface of magnetars 认领 引用 被引量：2
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作者 刘宏林 罗志全 +1 位作者 赖祥军 刘晶晶 《Chinese Physics B》 SCIE EI CAS 2008年第6期2317-2320,共4页
A simple and efficient screening model for studying the effects of superstrong magnetic fields （such as those of magnetars） on thermonuclear reaction rates on magnetar surfaces is proposed in this paper. The most in... A simple and efficient screening model for studying the effects of superstrong magnetic fields （such as those of magnetars） on thermonuclear reaction rates on magnetar surfaces is proposed in this paper. The most interesting thermonuclear reactions, including hydrogen burning by the CNO cycle and helium burning by the triple alpha reaction, are investigated on the surface ofmagnetars. We find that the superstrong magnetic fields can increase the thermonuclear reaction rates by many orders of magnitude. The enhancement may have a dramatic effect on the thermonuclear runaways and bursts on the surfaces of magnetars. 展开更多
关键词 nudeosynthesis strong magnetic fields neutron stars
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常温核聚变研究进展评述 认领 引用 被引量：3
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作者 芶清泉 张清福 孙悦 《原子与分子物理学报》 CAS 北大核心 2008年第3期467-472,共6页
早在1989年清泉教授就以原子分子物理和晶体物理为基础提出了冷聚变机理的理论.按照此理论,在晶体中可以实现冷聚变,产生超热和聚变产物4He.在此理论提出后,我们在实验研究中观测到了以Pd或Ti为阴极电解重水过程中产生的明显的超热效应... 早在1989年清泉教授就以原子分子物理和晶体物理为基础提出了冷聚变机理的理论.按照此理论,在晶体中可以实现冷聚变,产生超热和聚变产物4He.在此理论提出后,我们在实验研究中观测到了以Pd或Ti为阴极电解重水过程中产生的明显的超热效应与聚变产物4He.这表明我们提出的理论预言是正确的.在过去的18年中我们进一步进行了反复深入的理论和实验研究,所得结果将在本文中进行系统总结和讨论. 展开更多
关键词 冷聚变 冷聚变机理 过热
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重氢原子进入钯或钛晶体中可能引起室温核聚变的理论探讨与实验研究 认领 引用 被引量：3
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作者 苟清泉 朱正和 张清福 《原子与分子物理学报》 CAS 北大核心 1990年第3期1491-1495,共5页
本文从原子分子及晶体物理出发,提出了室温核聚变机理。按照此理论,在以钯或钛为阴极的电解重水中,观察到明显的温度变化与放热效应,并测定了核聚变的产物。
关键词 重氢 原子 钯 钛 晶体 核聚变
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