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The α Transfer Effect on Sub-barrier Fusion of heavy Ions

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Chinese Physics Letters 1993年第2期10卷 97-99页

作者： SheN Hong he guozhu Department of physics Nankai UniversityTianjin 300071

Theαtransfer effect on sub-barrier fusion is calculated for^(16)O+^(148)Sm system by using the linear combination of nuclear orbits *** coupling between elastic scattering channel andαtransfer reaction channel cause... 详细信息

关键词： theory coupling

Principle of limitation of physical quantities and cyclic universe

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Science China(Physics,Mechanics & Astronomy) 2008年第5期51卷 451-458页

作者： he guozhu Department of Physics,Nankai University,Tianjin 300071,China Department of Physics Nankai University Tianjin China

A close study of heisenberg uncertainty principles reveals many significant facts,and all four major physical quantities,energy,time,momentum and length,have both lower and upper ***,many questions come *** are these limits?Some answers may lead to the understanding of the development of our *** is the shortest limit of time?At the beginning of big bang,there exists a tre-mendously short time,the Planck *** may be just the shortest time limit in our *** longest time limit might be the lifetime of our *** longest length might be the final diameter of our expanding *** these lead to a finite *** more coupling formulae are formed for the other two pairs of physical quantities,mass and speed,thermal energy and *** four physical quantities must also have *** already knew that speed has upper limit and temperature has lower *** these two formulae,Planck and Einstein equations are derived *** most other physical quantities are somewhat related to these major physical quantities,it seems that there exists a principle of limitation of physical quantities.A quantitative sketch of big bang is *** also shows that our universe will contract back to another big *** principle of limitation opens up some fields of *** may bring nature back to the harmony and determined world described by classical physics.

关键词： principle of limitation of physical quantities limits coupling formulae cyclic universe extension of conven-tional quantum mechanics no uncertainty for physical quantities quantitative evaluation of big bang

Alpha Transfer Effects in Oxygen Burning Reactions in Highly Evolved Stars

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Chinese journal of nuclear physics 1995年第4期17卷 312-317页

作者： Li, Lei Shen, Hong Ning, Pingzhi he, guozhu Nankai Univ Tianjin China

Using the molecular orbital theory including α transfer mechanism, calculations arepresented of the sub-barrier fusion cross sections for the important astrophysically interestingreactions 16O+16O. The resulting cross sections and S-factors are much larger than previousoptical model results at Ec.m.=5 MeV and below, although they are in agreement with eachother in a higher energy region. The corresponding reaction rate at temperature 4×105 K ex-ceeds the previous predictions by about 6 orders. This probably means that, in stellar interior,the occurrence of 16O+16O fusion may be easier than previously thought.

关键词： Nucleosynthesis Oxygen burning reaction Molecular orbital theory

∑HfF_5^- current monitoring with off-axis Faraday cup in AMS measurement of ^(182)Hf at CIAE

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Nuclear Science and Techniques 2012年第4期23卷 199-202页

作者： LI Zhenyu he Ming DONG Kejun LI Chaoli he guozhu he Xianwen ZHANG Wei HU Hao ZheNG Guowen LI heng WU Shaoyong JIANG Shan China Institute of Atomic Energy Beijing 102413China College of Physics Science and Technology Guangxi UniversityNanning 530004China

In order to reduce the systematic uncertainties caused by the sequential injection in AMS measurement of ^(182)Hf,a technique for instantaneous monitoring of off-axis∑HfF_5^- current was developed in the AMS laboratory at China Institute of Atomic Energy(CIAE).The stability and reliability of this method have been experimentally *** a result,the accuracy for AMS measurement of^(182)Hf was significantly improved.

关键词：中国原子能科学研究院 AMS 测量法拉第杯离轴 HF 监控电流

Optimization of Oil Extraction Conditions from Watermelon Seeds by Response Surface Methodology

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Agricultural Biotechnology 2014年第6期3卷 14-18,23页

作者： Wenwen ZHANG guozhu he Xifeng YIN Liming ZHANG Yiqing ZHUANG Agricultural Committee of Zhenjiang City Zhenjiang Agricultural Science Research Institute in Hilly Area of Jiangsu Province

Response surface methodology was used to optimize the extraction conditions of oil from watermelon seeds. Based on single factor experiments, the material to liquid ratio, extraction time and extraction solvent exhibited the highest effects on oil extraction. The mathematical model was established according to the Box-Behnken central composite design. The optimal extraction conditions consisted of a material to liquid ratio of 1：16.3 （g/ml）, an extraction time of 45.4 min, and petroleum ether as the organic solvent. The predicted and actual yields of watermelon seed oil were 27.92% and 28.04%, respectively. The extracted oil was analyzed by GC-MS. The results revealed that watermelon seed oil contained several types of acids and esters ; the relative percentages of the components were determined by a normalization method. The main fatty acids included linoleic acid, palmitic acid, oleic acid, and stearic acid, which accounted for 91.24% of the total components.

关键词： Watermelon seed oil Response surface methodology Extraction GC-MS

ON The EXCHANGE POTENTIAL OF ELASTIC TRANSFER SCATTERING

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Chinese Physics Letters 1986年第5期3卷 193-196页

作者： he guozhu GAO Chengqun CheN Xiyu Nankai University Tianjing Inner Mongolia National Normal College

In the LCNO theory,a simple analytic approximate expression has been derived for the exchange potential which has definite value at R=0 and can be applied to the whole region.

关键词： definite approximate analytic

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中子注量率波动修正因子及其应用

原子核物理评论 2013年第4期30卷 403-406页

作者：贺国珠兰长林中国原子能科学研究院核数据重点实验室北京102413 兰州大学核科学与技术学院甘肃兰州730000

在中子核反应研究中,尤其是在利用活化法进行中子核反应截面测量研究时,需要准确测量样品辐照的中子注量。监督反应标准截面法简便可行,在一些核反应截面测量研究中经常用来定量样品辐照的中子注量。在利用监督片核反应剩余核的放射性... 详细信息

在中子核反应研究中,尤其是在利用活化法进行中子核反应截面测量研究时,需要准确测量样品辐照的中子注量。监督反应标准截面法简便可行,在一些核反应截面测量研究中经常用来定量样品辐照的中子注量。在利用监督片核反应剩余核的放射性活度计算平均中子注量率时,中子注量率波动修正因子是一个很重要的参数。对中子注量率波动修正因子进行了详细阐述,通过理论推导给出了中子注量率波动修正因子的定义,从实际应用出发讨论了中子注量率波动修正因子的使用条件和监督反应的选择原则。

关键词：中子注量率修正因子