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锻造变形过程中孔洞缺陷闭合行为Q-Value法研究 被引量:2
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作者 韩笑宇 曹明 《大型铸锻件》 2019年第5期11-13,24,共4页
以宽厚板支承辊锻造所用大型钢锭为研究对象,通过对模拟软件中用户子程序二次开发,运用Q-Value阈值法对大锻件内部孔洞缺陷在锻造变形过程中的闭合行为进行预测,从而极大简化了传统孔洞类缺陷变形的模拟思路,提高了模拟效率。
关键词 孔洞缺陷 闭合行为 数值模拟 q-value
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Characteristics of coda Q-value in the midnorthern part of Ningxia 被引量:1
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作者 赵卫明 杨明芝 +2 位作者 金延龙 许文俊 任雪梅 《Acta Seismologica Sinica(English Edition)》 CSCD 2000年第3期265-272,共8页
On the basis of previous studies, this paper in studying the coda Q-valuc of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q-value, and has investigated the dependence... On the basis of previous studies, this paper in studying the coda Q-valuc of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q-value, and has investigated the dependence of coda wave of earthquakes on frequency and sampling depth. Analysis of digital seismograms recorded by the Yinchuan Telemetric Seismic Network, Ningxia, shows that not only the coda wave Q-value of shocks is strongly dependent on frequency but also its dependence on Samling depth cannot be neglected. In the commonly used formula that describes the dependence cbaracteristics of coda Q-value of endquakes, Q = Qof', the parameter Qo rises obviously whilc n drops when the sampling depth increases, and their changes can be fitted by linear relations. This paper has explained such a characteristic. Whether this characteristic exists universally needs to be verified by more study results because the genetic mechanism of coda wave of earthquakes is more complex. 展开更多
关键词 coda q-value digital record forquency band lapse time sampling depth
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Positive Q-Value Neutron Transfer Mediated Sub-Barrier Fusion Reactions
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作者 Pei-Wei Wen Zhao-Qing Feng +3 位作者 Fan Zhang Cheng Li Cheng-aian Li Feng-Shou Zhang 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第4期22-25,共4页
Positive Q-value neutron transfer mediated sub-barrier fusion reactions are studied with an empirical coupled channels model, which takes into account neutron rearrangement related only to the dynamical matching condi... Positive Q-value neutron transfer mediated sub-barrier fusion reactions are studied with an empirical coupled channels model, which takes into account neutron rearrangement related only to the dynamical matching condition with no free parameters. Fusion cross sections of collision systems ^32S+^90,94,96Zr are calculated and analyzed. Logarithmic residual enhancement (LRE) is proposed to evaluate the discrepancy between calculated results and experimental data. The experimental data can be described well with this model for the first time as a whole, while the LRE analysis shows that there are still theoretical systematic deviations. 展开更多
关键词 LRE MRE exp Positive q-value Neutron Transfer Mediated Sub-Barrier Fusion Reactions Zr
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Research on the Q-value, Site Response and Seismic Source Parameters in Jiangsu and Its Adjacent Areas
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作者 Kang Qingqing Gu Qinping +4 位作者 Miao Fajun Zhang Jinchuan Zhou Kangya Yang Chi Li Zhengkai 《Earthquake Research in China》 CSCD 2017年第2期213-224,共12页
Based on 49 digital seismograms recorded by 73 seismic stations in the Jiangsu Telemetered Seismic Network,the paper uses Atkinson's method to calculate the inelastic attenuation coefficient of the Jiangsu area. W... Based on 49 digital seismograms recorded by 73 seismic stations in the Jiangsu Telemetered Seismic Network,the paper uses Atkinson's method to calculate the inelastic attenuation coefficient of the Jiangsu area. We find that the frequency-dependent Q in the Jiangsu region is Q( f) = 272. 1·f^(0. 5575). We also use Moya's method to invert the 63 stations' site responses. The results show that the site responses of the 25 stations in Jiangsu are approximately 1 at a range between 1Hz and 20 Hz, which is consistent with their basements on rocks. The response curves of the site responses of the 14 underground stations are similar to each other. Their site responses show an amplification at low frequencies and minimization at high frequencies. The calculation of the Brune model on the waveform data of M_L≥2. 5 earthquakes from Jiangsu Digital Seismic Network between October 2010 and May 2015 in terms of seismic source parameters of 58 seismic waves shows that there are good correlations between seismic magnitude and other source parameters such as seismic moment, source radius and corner frequency, while the correlations between seismic magnitude and stress drop,and stress drop and source radius are not so good. 展开更多
关键词 Jiangsu and its adjacent areas q-value Site response Source parameters
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Improved Double Deep Q Network Algorithm Based on Average Q-Value Estimation and Reward Redistribution for Robot Path Planning
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作者 Yameng Yin Lieping Zhang +3 位作者 Xiaoxu Shi Yilin Wang Jiansheng Peng Jianchu Zou 《Computers, Materials & Continua》 SCIE EI 2024年第11期2769-2790,共22页
By integrating deep neural networks with reinforcement learning,the Double Deep Q Network(DDQN)algorithm overcomes the limitations of Q-learning in handling continuous spaces and is widely applied in the path planning... By integrating deep neural networks with reinforcement learning,the Double Deep Q Network(DDQN)algorithm overcomes the limitations of Q-learning in handling continuous spaces and is widely applied in the path planning of mobile robots.However,the traditional DDQN algorithm suffers from sparse rewards and inefficient utilization of high-quality data.Targeting those problems,an improved DDQN algorithm based on average Q-value estimation and reward redistribution was proposed.First,to enhance the precision of the target Q-value,the average of multiple previously learned Q-values from the target Q network is used to replace the single Q-value from the current target Q network.Next,a reward redistribution mechanism is designed to overcome the sparse reward problem by adjusting the final reward of each action using the round reward from trajectory information.Additionally,a reward-prioritized experience selection method is introduced,which ranks experience samples according to reward values to ensure frequent utilization of high-quality data.Finally,simulation experiments are conducted to verify the effectiveness of the proposed algorithm in fixed-position scenario and random environments.The experimental results show that compared to the traditional DDQN algorithm,the proposed algorithm achieves shorter average running time,higher average return and fewer average steps.The performance of the proposed algorithm is improved by 11.43%in the fixed scenario and 8.33%in random environments.It not only plans economic and safe paths but also significantly improves efficiency and generalization in path planning,making it suitable for widespread application in autonomous navigation and industrial automation. 展开更多
关键词 Double Deep Q Network path planning average q-value estimation reward redistribution mechanism reward-prioritized experience selection method
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A new monitoring index for ecological vulnerability and its application in the Yellow River Basin,China from 2000 to 2022
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作者 GUO Bing XU Mei +1 位作者 ZHANG Rui LUO Wei 《Journal of Arid Land》 SCIE CSCD 2024年第9期1163-1182,共20页
The ecological environment of the Yellow River Basin has become more fragile under the combined action of natural and manmade activities.However,the change mechanisms of ecological vulnerability in different sub-regio... The ecological environment of the Yellow River Basin has become more fragile under the combined action of natural and manmade activities.However,the change mechanisms of ecological vulnerability in different sub-regions and periods vary,and the reasons for this variability are yet to be explained.Thus,in this study,we proposed a new remote sensing ecological vulnerability index by considering moisture,heat,greenness,dryness,land degradation,and social economy indicators and then analyzed and disclosed the spatial and temporal change patterns of ecological vulnerability of the Yellow River Basin,China from 2000 to 2022 and its driving mechanisms.The results showed that the newly proposed remote sensing ecological vulnerability index had a high accuracy,at 86.36%,which indicated a higher applicability in the Yellow River Basin.From 2000 to 2022,the average remote sensing ecological vulnerability index of the Yellow River Basin was 1.03,denoting moderate vulnerability level.The intensive vulnerability area was the most widely distributed,which was mostly located in the northern part of Shaanxi Province and the eastern part of Shanxi Province.From 2000 to 2022,the ecological vulnerability in the Yellow showed an overall stable trend,while that of the central and eastern regions showed an obvious trend of improvement.The gravity center of ecological vulnerability migrated southwest,indicating that the aggravation of ecological vulnerability in the southwestern regions was more severe than in the northeastern regions of the basin.The dominant single factor of changes in ecological vulnerability shifted from normalized difference vegetation index(NDVI)to temperature from 2000 to 2022,and the interaction factors shifted from temperature∩NDVI to temperature∩precipitation,which indicated that the global climate change exerted a more significant impact on regional ecosystems.The above results could provide decision support for the ecological protection and restoration of the Yellow River Basin. 展开更多
关键词 ecological vulnerability spatio-temporal pattern gravity center migration trajectory interaction factors geodetector green index q-value
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论用球谐函数拟合地幔地震波品质因数Q值空间分布
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作者 郭履灿 赵卫明 郭勤 《CT理论与应用研究(中英文)》 1993年第4期39-45,共7页
本文引用S.J.Duda所导出的吸收特征时间t<sup>*</sup>与震中距离△的关系,由地震台网观测的地震波振幅A和周期T,求得观测的t<sub>0</sub><sup>*</sup>,及t<sub>0</sub><sup>*<... 本文引用S.J.Duda所导出的吸收特征时间t<sup>*</sup>与震中距离△的关系,由地震台网观测的地震波振幅A和周期T,求得观测的t<sub>0</sub><sup>*</sup>,及t<sub>0</sub><sup>*</sup>~△的关系函数,用以拟合不同周期范围地震波品质因数Q 值随深度的分布Q(h),从而计算理论的t<sup>*</sup>,再由t<sup>*</sup>的残差δt<sup>*</sup>与δQ 的关系参照A.M.Dzjewonskj 拟合地幔地震波速度三维分布的方法运用球谐函数的关系拟合地幔地震波品质因数Q 值的三维空间分布。 展开更多
关键词 Seismic-wave’s q-value SPHERICAL HARMONIC function 3D-distribution of q-value
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Seismic physical modeling and quality factor 被引量:1
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作者 Gao Feng Wei Jian-Xin and Di Bang-Rang 《Applied Geophysics》 SCIE CSCD 2018年第1期46-56,148,共12页
Accurate Q parameter is hard to be obtained, but there is great difference between Q measurements from different measurement methods in seismic physical modelling. The influence factors, stability and accuracy of diff... Accurate Q parameter is hard to be obtained, but there is great difference between Q measurements from different measurement methods in seismic physical modelling. The influence factors, stability and accuracy of different methods are analyzed through standard sample experiment and the seismic physical modelling. Based on this, we proposed an improved method for improving accuracy of pulse transmission method, in which the samples with similar acoustic properties to the test sample are selected as the reference samples. We assess the stability and accuracy of the pulse transmission, pulse transmission insertion, and reflection wave methods for obtaining the quality factor Q using standard and reference samples and seismic physical modeling. The results suggest that the Q-values obtained by the pulse transmission method are strongly affected by diffraction and the error is 50% or greater, whereas the relative error of the improved pulse transmission method is about 10%. By using a theoretical diffraction correction method and the improved measurement method, the differences among the Q-measuring methods can be limited to within 10%. 展开更多
关键词 Seismic physical modeling q-value diffraction effect.
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A Study of Rock Magnetism of High-Grade Hematite Ores 被引量:1
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作者 William W. Guo 《Journal of Applied Mathematics and Physics》 2015年第2期156-160,共5页
Rock magnetism is useful in various applications. Hematite is one of the two most important carriers of magnetism in the natural world and its magnetic features were mostly studied through laboratory experiments using... Rock magnetism is useful in various applications. Hematite is one of the two most important carriers of magnetism in the natural world and its magnetic features were mostly studied through laboratory experiments using synthetic hematite samples. A gap exists between the magnetic behaviors of hematite contained in the natural rocks and ores and those of synthetic hematite samples. This paper presents the results of a rock magnetism study on the natural hematite ores from the Whaleback mine in the Hamersley Province in the northwest of Western Australia. It was found that high-grade hematite ores carry a much higher remanent magnetization than induced magnetization. Hematite ores with less than 0.1% magnetite appear to have an exponential correlation between the bulk susceptibility and hematite content in weight percentage, different from the commonly accepted linear relationship between the bulk susceptibility and hematite content obtained from synthetic hematite samples. The new knowledge gained from this study contributes to a better understanding of magnetic behaviors of hematite, particularly natural hematite, and hence applications to other relevant disciplines. 展开更多
关键词 Rock MAGNETISM HIGH-GRADE HEMATITE ORES Anisotropy of MAGNETITE Susceptibility q-value Hamersley Province
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Reducing risk in long deep tunnels by using TBM and drill-and-blast methods in the same project-the hybrid solution 被引量:2
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作者 Nick Barton 《Journal of Rock Mechanics and Geotechnical Engineering》 2012年第2期115-126,共12页
There are many examples of TBM tunnels through mountains, or in mountainous terrain, which have suffered the ultimate fate of abandonment, due to insufficient pre-investigation. Depth-of-drilling limitations are inevi... There are many examples of TBM tunnels through mountains, or in mountainous terrain, which have suffered the ultimate fate of abandonment, due to insufficient pre-investigation. Depth-of-drilling limitations are inevitable when depths approach or even exceed l or 2 km. Uncertainties about the geology, hydro-geology, rock stresses and rock strengths go hand-in-hand with deep or ultra-deep tunnels. Unfortunately, unexpected conditions tend to have a much bigger impact on TBM projects than on drill-and-blast projects. There are two obvious reasons. Firstly the circular excavation maximizes the tangential stress, making the relation to rock strength a higher source of potential risk. Secondly, the TBM may have been progressing fast enough to make probe-drilling seem to be unnecessary. If the stress-to-strength ratio becomes too high, or if faulted rock with high water pressure is unexpectedly encountered, the "unexpected events" may have a remarkable delaying effect on TBM. A simple equation explains this phenomenon, via the adverse local Q-value that links directly to utilization. One may witness dramatic reductions in utilization, meaning ultra-steep deceleration-of-the-TBM gradients in a log-log plot of advance rate versus time. Some delays can be avoided or reduced with new TBM designs, where belief in the need for probe-drilling and sometimes also pre-injection, have been fully appreciated. Drill-and-blast tunneling, inevitably involving numerous "probe-holes" prior to each advance, should be used instead, if investigations have been too limited. TBM should be used where there is lower cover and where more is known about the rock and structural conditions. The advantages of the superior speed of TBM may then be fully realized. Choosing TBM because a tunnel is very long increases risk due to the law of deceleration with increased length, especially if there is limited pre-investigation because of tunnel depth. 展开更多
关键词 tunnel boring machine (TBM) rock strength deep tunnels tangential stress pre-injection q-values UTILIZATION risk
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Research on overlapping structures and evolution properties of co-citation network 被引量:2
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作者 Shiji CHEN Xiaolin ZHANG 《Chinese Journal of Library and Information Science》 2013年第1期1-13,共13页
Purpose: This paper intends to explore methodologies and indicators for the analysis of overlapping structures and evolution properties in a co-citation network, and provide reference for overlapping structure analysi... Purpose: This paper intends to explore methodologies and indicators for the analysis of overlapping structures and evolution properties in a co-citation network, and provide reference for overlapping structure analysis of other scientific networks.Design/methodology/approach: The Q-value variance is defined to achieve overlapping structures of different levels in the scientific networks. At the same time, analyses for time correlation variance and subject correlation variance are used to present the formation of overlapping structures in scientific networks. As a test, a co-citation network of highly cited papers on Molecular Biology & Genetics from Essential Science Indicator(ESI) is taken as an example for an empirical analysis.Findings: Our research showed that the Q-value variance is effective for achieving the desired overlapping structures. Meanwhile, the time correlation variance and subject correlation variance are equally useful for uncovering the evolution progress of scientific research, and the properties of overlapping structures in the research of co-citation network as well.Research limitations: In this paper, the theoretical analysis and verification of time and subject correlation variances are still at its initial stage. Further studies in this regard need to take actual evolution of research areas into consideration.Practical implications: Evolution properties of overlapping structures pave the way for overlapping and evolution analysis of disciplines or areas, this study is of practical value for the planning of scientific and technical innovation.Originality/value: This paper proposes an analytical method of time correlation variance and subject correlation variance based on the evolution properties of overlapping structures, which would provide the foundation for the evolution analysis of disciplines and interdisciplinary research. 展开更多
关键词 Overlapping structure Co-citation network q-value variance Time correlation variance Subject correlation variance
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Mass Measurement of ^(168)Dy by Heavy Ion Transfer Reaction
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作者 Lu Xiuqin Guo Jiyu Zhao Kui Cheng Yehao Ma Yong Li Zhichang Li Shuyuan Ruan Ming China Institule of Atomic Energy,P.O.Box 275-10,Beijing 102413 《Chinese journal of nuclear physics》 1996年第4期200-203,共4页
The mass of <sup>168</sup>Dy is measured for the first time,using the two-proton pick-up reaction <sup>170</sup>Er(<sup>18</sup>O,<sup>20</sup>Ne)at an <sup>18<... The mass of <sup>168</sup>Dy is measured for the first time,using the two-proton pick-up reaction <sup>170</sup>Er(<sup>18</sup>O,<sup>20</sup>Ne)at an <sup>18</sup>O energy of 104 MeV.The products of the reaction are detected at the focal plane ofthe Q3D spectrometer.The mass excess of <sup>168</sup>Dy is found to be -58.56±0.14 MeV. 展开更多
关键词 —Heavy-ion transfer reaction MASS EXCESS q-value
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Measurement of the Mass Excess of ^(158)Sm
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作者 Zhao Kui Guo Ji-yu Lu Xiu-qin Cheng Ye-hao Huang Xiao-lin Ma Yong Li Shu-yuan Ruan Ming Li Zhi-chang Jiang Cheng-lie China Institute of Atomic Energy,P.O.Box 275(10),Beijing 102413 《Chinese journal of nuclear physics》 1995年第3期234-238,共5页
A Q-value of —4.076±0.151 MeV has been determined for the two-proton transfer reaction<sup>160</sup>Gd(<sup>18</sup>O,<sup>20</sup>Ne)<sup>158</sup>Sm,which yields... A Q-value of —4.076±0.151 MeV has been determined for the two-proton transfer reaction<sup>160</sup>Gd(<sup>18</sup>O,<sup>20</sup>Ne)<sup>158</sup>Sm,which yields a first experimental measured value of —65.764±0.151 MeV forthe mass excess of <sup>158</sup>Sm,the nucleus far from stability.The result is compared with current theoreticalpredictions. 展开更多
关键词 HEAVY ion REACTION q-value MASS EXCESS
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New measurement of 4^(H)e and proton decays from resonant states in^(19)Ne 被引量:1
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作者 马凯 叶沿林 +21 位作者 林承键 陈家豪 王东玺 韩家兴 贾会明 杨磊 阳黎升 胡梓瑶 陈莹 蒲伟良 李根 谭智威 黄大湖 骆天鹏 钟善豪 楼建玲 杨晓菲 李智焕 李奇特 许金艳 杨再宏 魏康 《Chinese Physics C》 SCIE CAS CSCD 2023年第11期50-56,共7页
A^(6)Li(^(16)O,^(19)Ne^(∗))^(3)H multi-nucleon transfer-reaction experiment was performed to populate the highly excited states in^(19)Ne.The subsequent decay particles,^(4)He or protons from the^(19)Ne resonant state... A^(6)Li(^(16)O,^(19)Ne^(∗))^(3)H multi-nucleon transfer-reaction experiment was performed to populate the highly excited states in^(19)Ne.The subsequent decay particles,^(4)He or protons from the^(19)Ne resonant states,were detected in coincidence with the recoil 3 H.The excitation-energy spectra of^(19)Ne were reconstructed using the detected proton or^(4)He and the deduced^(18)F or^(15)O data,respectively.A broad resonance at about 7.85 MeV(1/2^(+))was observed,with partial decay widths different from the previously reported values,which may have a significant impact on the destruction of 18 F in astrophysical processes.Several resonances up to very high excitation energies have been identified with a largeα-clustering strength,which confirm the formation of the cluster structure with a one-hole configuration in light nuclei and encourage further systematic studies of the cluster structure in^(19)Ne. 展开更多
关键词 resonant state q-value branch ratio partial decay width
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Preformation probability and kinematics of cluster emission yielding Pb-daughters
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作者 Joshua T.Majekodunmi M.Bhuyan +2 位作者 K.Anwar N.Abdullah Raj Kumar 《Chinese Physics C》 SCIE CAS CSCD 2023年第7期123-132,共10页
In the present study,the newly established preformation formula is applied for the first time to study the kinematics of the cluster emission from various radioactive nuclei,especially those that decay to the double s... In the present study,the newly established preformation formula is applied for the first time to study the kinematics of the cluster emission from various radioactive nuclei,especially those that decay to the double shell closure^(208)Pb nucleus and its neighbors as daughters.The recently proposed universal cluster preformation formula has been established based on the concepts that underscore the influence of mass and charge asymmetry(η_(A)andη_(Z)),cluster mass A_(c),and the Q-value,paving the way to quantify the energy contribution during preformation as well as during the tunneling process separately.The cluster-daughter interaction potential is obtained by folding the relativistic mean-field(RMF)densities with the recently developed microscopic R3Y using the NL 3^(*)and the phenomenological M3Y NN potentials to compare their adaptability.The penetration probabilities are calculated from the WKB approximation.With the inclusion of the new preformation probability P_(0),the predicted half-lives of the R3Y and M3Y interactions are in good agreement with the experimental data.Furthermore,a careful inspection reflects slight differences in the decay half-lives,which arise from their respective barrier properties.The P_(0)for systems with double magic shell closure^(208)Pb daughter are found to be an order of≈10^(2)higher than those with neighboring Pb daughter nuclei.By exploring the contributions of the decay energy,the recoil effect of the daughter nucleus is evaluated,in contrast to several other conjectures.Thus,the centrality of the Q-value in the decay process is demonstrated and redefined within the preformed cluster-decay model.Additionally,we have introduced a simple and intuitive set of criteria that governs the estimation of recoil energy in the cluster radioactivity. 展开更多
关键词 relativistic mean field cluster radioactivity preformation probability decay width and half life recoil energy q-value of the decay
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α-cluster decay from ^(24)Mg resonances produced in the ^(12)C(^(16)O,^(24)Mg)α reaction
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作者 王东玺 叶沿林 +21 位作者 林承键 陈家豪 马凯 韩家兴 贾会明 杨磊 阳黎升 胡梓瑶 陈莹 蒲伟良 李根 谭智威 朱宏渝 骆天鹏 钟善豪 黄大湖 楼建玲 杨晓菲 李奇特 许金艳 杨再宏 魏康 《Chinese Physics C》 SCIE CAS CSCD 2023年第1期135-140,共6页
A transfer reaction and cluster-decay experiment,12C(16O,24Mg→ α+20Ne)α, was performed at a beam energy of 96 MeV. Both recoil and decay α particles were detected in coincidence, allowing us to deduce the energymo... A transfer reaction and cluster-decay experiment,12C(16O,24Mg→ α+20Ne)α, was performed at a beam energy of 96 MeV. Both recoil and decay α particles were detected in coincidence, allowing us to deduce the energymomentum of a20Ne fragment. A number of resonant states of24Mg were reconstructed up to an excitation energy of approximately 30 MeV. Owing to the experimentally achieved excellent resolutions of the Q-value and excitationenergy spectra, the relative decay widths for each resonant state in24Mg to various final states of20Ne were extracted, along with the total decay width. The obtained results provide good testing ground for theoretical descriptions of multiple clustering configurations in24Mg. 展开更多
关键词 reaction q-value transfer reaction cluster decay relative decay width
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Evaluation of modified adaptive k-means segmentation algorithm 被引量:5
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作者 Taye Girma Debelee Friedhelm Schwenker +1 位作者 Samuel Rahimeto Dereje Yohannes 《Computational Visual Media》 CSCD 2019年第4期347-361,共15页
Segmentation is the act of partitioning an image into different regions by creating boundaries between regions.k-means image segmentation is the simplest prevalent approach.However,the segmentation quality is continge... Segmentation is the act of partitioning an image into different regions by creating boundaries between regions.k-means image segmentation is the simplest prevalent approach.However,the segmentation quality is contingent on the initial parameters(the cluster centers and their number).In this paper,a convolution-based modified adaptive k-means(MAKM)approach is proposed and evaluated using images collected from different sources(MATLAB,Berkeley image database,VOC2012,BGH,MIAS,and MRI).The evaluation shows that the proposed algorithm is superior to k-means++,fuzzy c-means,histogrambased k-means,and subtractive k-means algorithms in terms of image segmentation quality(Q-value),computational cost,and RMSE.The proposed algorithm was also compared to state-of-the-art learning-based methods in terms of IoU and MIoU;it achieved a higher MIoU value. 展开更多
关键词 CLUSTERING MODIFIED ADAPTIVE k-means(MAKM) SEGMENTATION q-value
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Self-consistent analysis of sub-barrier fusion enhancement effect in Ca+Ca and Ni+Ni
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作者 马南茹 贾会明 +8 位作者 林承键 杨磊 徐新星 孙立杰 杨峰 吴振东 张焕乔 刘祖华 王东玺 《Chinese Physics C》 SCIE CAS CSCD 2016年第11期63-66,共4页
The fusion dynamic mechanism of heavy ions at energies near the Coulomb barrier is complicated and still not very clear up to now. Accordingly, a self-consistent method based on the CCFULL calculations has been develo... The fusion dynamic mechanism of heavy ions at energies near the Coulomb barrier is complicated and still not very clear up to now. Accordingly, a self-consistent method based on the CCFULL calculations has been developed and applied for an ongoing study of the effect of the positive Q-value neutron transfer (PQNT) channels in this work. The typical experimental fusion data of Ca + Ca and Ni + Ni is analyzed within the unified calculation scheme. The PQNT effect in near-barrier fusion is further confirmed based on the self-consistent analysis and extracted quantitatively. 展开更多
关键词 sub-barrier fusion enhancement coupled-channels calculation positive q-value neutron transfer resid-ual enhancement
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