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Theoretical study of fusion reactions ^(32)S + ^(94,96)Zr and ^(40)Ca + ^(94,96)Zr and quadrupole deformation of ^(94)Zr

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Science China(Physics,Mechanics & Astronomy) 2016年第4期59卷 58-65页

作者： Bing Wang weijuan zhao EnGuang zhao ShanGui Zhou Department of Physics Zhengzhou University State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator

The dynamic coupling effects on fusion cross sections for reactions^(32)S + ^(94,96)Zr and ^(40)Ca + ^(94,96)Zr are studied with the universal fusion function formalism and an empirical coupled channel(ECC) model. An examination of the reduced fusion functions shows that the total effect of couplings to inelastic excitations and neutron transfer channels on fusion in ^(32)S +^(94)Zr(^(40)Ca +^(94)Zr) is almost the same as that in ^(32)S +^(96)Zr(^(40)Ca +^(96)Zr). The enhancements of the fusion cross section at sub-barrier energies due to inelastic channel coupling and neutron transfer channel coupling are evaluated separately by using the ECC model. The results show that effect of couplings to inelastic excitations channels in the reactions with94 Zr as target should be similar as that in the reactions with ^(96) Zr as target. This implies that the quadrupole deformation parameters β_2of ^(94)Zr and^(96) Zr should be similar to each ***, β_2 's predicted from the finite-range droplet model, which are used in the ECC model, are quite different. Experiments on^(48) Ca +^(94)Zr or^(36) S +^(94)Zr are suggested to solve the puzzling issue concerning β_2for^(94)Zr.

关键词： empirical coupled channel model barrier distribution universal fusion function neutron transfer

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给定图的距离熵及其应用

运筹与模糊学 2024年第3期14卷 1389-1396页

作者：杨晨魏远振赵渭娟刘婷婷青海师范大学数学与统计学院青海西宁宝鸡文理学院数学与信息科学学院陕西宝鸡

图熵是图的信息理论测度,近年来,图熵慢慢成为测量图的结构信息测度的载体,距离是最重要的图不变量之一。本文主要研究了树和化学树的距离熵及其相关应用,并且研究了给定图在笛卡尔积、强积和冠积运算下的距离熵值。

关键词：图熵距离熵化学树图运算

Microelement analysis of source of raw materials of terracotta warriors and horses of Qin's Mausoleum in pits No.1 and No.2

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Chinese Science Bulletin 2002年第16期47卷 1337-1340页

作者： weijuan zhao Aijun Xu Rongwu Li Zhengyao Gao Guoxia Li Jianzhong Xie Guohe Han Songlin Feng Dongyu Fan Ying Zhang et al. Faculty of Physical Engineering Zhengzhou University Zhengzhou China Department of Physics Beijing Normal University Beijing China High Energy Physics Institute The Chinese Academy of Sciences Beijing China Museum of the Terracotta Warriors and Horses of Qin Shihuang’s Mausoleum Xi’an China

In order to search for sources of the raw material of the Qin’s terracotta warriors and horses, we selected 20 samples of pottery warriors and pottery horses of the Qin’s Mausoleum from pit No. 1,19 samples of pottery warriors and brick from pit No. 2, 20 samples of clays near the Qin’s Mausoleum and 2 samples of Yaozhou porcelain bodies. The 32 kinds of element content of each sample were measured by neutron activation analysis (NAA). These data were analyzed by fuzzy cluster analysis, the trend cluster analysis diagram was obtained. The results showed that samples of terracotta warriors and horses from pits No.1 and No. 2 were closely related to the loam layer near Qin’s Mausoleum, but their relations with the loess layers were not so close, and they were out of all relation to Yaozhou porcelain bodies. Thus, it could be deduced that the Li Mountain clay may be considered as the original place of the raw materials of the terracotta warriors and horses, the kiln sites might be located nearby the Qin’s

关键词： fuzzy cluster analysis terracotta warriors and horses of Qin’s Mausoleum the original place of raw material neutron acti-vation analysis microelement analysis.

Calculations of the Gamma Energy Spectra from Neutron Radiative Capture Reactions for 197Au

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中国核科技报告 2000年第S3期 33-41页

作者： Liu Jianfeng zhao weijuan (Department of Physics, Zhengzhou University, 450052)

The aim of this paper is to theoretically explain the abnormal protuberances near and above 5.5 MeV in the gamma spectra of the (n,γ) reactions of the nuclei within the nuclear mass regions from 110 to 140 and from 180 to 210, respectively. Supposing that in the primary and cascade gamma de-excitation processes of the compound nucleus, in addition to the giant dipole resonance model, there exist the de-excitation processes of the excited states of ~6He, ~6Li, ~6Be, ~7Li and ~7Be particle cliques, for which the gamma-ray strength function was developed. The (n,γ)reaction cross sections and the gamma energy spectra at the neutron incident energies from 0.01 MeV to 3 MeV forAu were calculated and the results are in better coincidence with the experimental data. Especially for the gamma energy spectra, the abnormal protuberances near and above 5.5 MeV were reproduced very well.

关键词： Au Calculations of the Gamma Energy Spectra from Neutron Radiative Capture Reactions for

Neutron activation analysis and Mossbauer spectroscopy research on coloring mechanism of Chinese Ru porcelain

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Chinese Science Bulletin 2002年第14期47卷 1163-1166页

作者： LI Rongwu YANG Lei LI Guoxia zhao weijuan GAO Zhengyao XIE Jianzhong CHEN Jin ZHANG Bin SUN Xinmin FENG Songlin JIA Xiuqin HAN Song HUANG Zhongxiang Department of Physics Beijing Normal UniversityBeijing 100875China Faculty of Physical Engineering Zhengzhou UniversityZhengzhou 450052China Faculty of English Language Zhengzhou UniversityZhengzhou 450052China Department of Architecture Zhengzhou UniversityZhengzhou 450052China Institute of Cultural Relic Archaeology of Henan Province Zhengzhou 450004China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100080China

The characteristic spectrum and its main wavelength of Ru porcelain glaze are measured by color difference instrument to determine the relations between glaze color and its main wavelength. The content of the 30 coloring elements in Ru porcelain is determined by neutron activation analysis (NAA), which showed that iron is the major coloring element. Mossbauer spectroscopy analysis shows that the iron element in the glaze exists in the form of structural iron (Fe2+, Fe3+). The quantitative relationship between the main wavelength of glaze in various colors and the relative content of structural iron (Fe2+/Fe3+) is determined. Thus the coloring mechanism of Ru porcelain is investigated entirely.

关键词： Ru porcelain characteristic spectrum NAA Mossbauer spectroscopy coloring mechanism.

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变截面毛细通道中气泡的运动特性分析

北京航空航天大学学报 2006年第7期32卷 847-851页

作者：曹瑜张佐光赵卫娟北京航空航天大学材料科学与工程学院北京100083

为了确定复合材料成型过程中气泡的运动条件,利用变截面毛细模拟通道实验系统,研究了气泡在变截面毛细管中的运动行为,分析了气泡长度、毛细管半径及液体种类对气泡垂直穿出行为的影响,并从理论角度推导出气泡穿出的临界压力方程.研究... 详细信息

为了确定复合材料成型过程中气泡的运动条件,利用变截面毛细模拟通道实验系统,研究了气泡在变截面毛细管中的运动行为,分析了气泡长度、毛细管半径及液体种类对气泡垂直穿出行为的影响,并从理论角度推导出气泡穿出的临界压力方程.研究结果表明,气泡垂直穿出变截面毛细通道所需要的临界压力差,随气泡长度和毛细管半径的增大而减小,液体种类对其也有明显影响,实验结果与理论计算值基本吻合.该研究结果将为复合材料成型中工艺参数的优化提供实验依据.

关键词：复合材料孔隙气泡运动

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上海激光电子伽马源的伽马活化实验平台建设

原子核物理评论 2024年第1期41卷 433-438页

作者：杨宇萱张岳赵维娟王宏伟范功涛许杭华刘龙祥郝子锐李志才金晟陈开杰焦普周梦蝶王振伟郑州大学物理学院郑州450001 中国科学院上海应用物理研究所上海201800 中国科学院上海高等研究院上海201210 中国科学院大学北京100080 南华大学核科学与技术学院湖南衡阳421001 上海科技大学物质科学与技术学院上海201210 河南师范大学物理学院河南新乡453007

上海激光电子伽马源(Shanghai Laser Electron Gamma Source,SLEGS)通过激光与电子逆康普顿散射产生准单能、能量连续可调的兆电子伏伽马束,是目前国际上唯一一台可连续变换碰撞角度的激光康普顿散射(Laser Compton Scattering,LCS)伽... 详细信息

上海激光电子伽马源(Shanghai Laser Electron Gamma Source,SLEGS)通过激光与电子逆康普顿散射产生准单能、能量连续可调的兆电子伏伽马束,是目前国际上唯一一台可连续变换碰撞角度的激光康普顿散射(Laser Compton Scattering,LCS)伽马源装置。伽马活化是研究材料特性的有效手段之一,本文介绍了上海激光电子伽马源的伽马活化平台情况:包括在线活化过程、离线低本底测量、高纯锗(High Purity Germanium,HPGe)探测器的能量效率刻度等。目前的低本底屏蔽使得测量系统本底计数率降低到约5.2 cps(60 keV~3 MeV能区)。SLEGS的活化平台为开展伽马活化测量研究提供了有利条件,未来在核物理、核天体物理、医学应用、材料科学和环境科学等领域的研究将会发挥重要的作用。

关键词：伽马源伽马活化低本底测量 SLEGS

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树脂流动对气泡运动特性的影响

复合材料学报 2006年第2期23卷 25-29页

作者：赵卫娟张佐光王景明北京航空航天大学材料科学与工程学院北京100083

为了排除复合材料成型过程中的气泡,建立了气泡运动可视化装置,研究了树脂流动状态和流动速度对气泡运动速度的影响,并在此基础上建立了气泡运动模型。研究结果表明:树脂流动对气泡运动有明显的带动或阻碍作用。当树脂流动方向与气泡运... 详细信息

为了排除复合材料成型过程中的气泡,建立了气泡运动可视化装置,研究了树脂流动状态和流动速度对气泡运动速度的影响,并在此基础上建立了气泡运动模型。研究结果表明:树脂流动对气泡运动有明显的带动或阻碍作用。当树脂流动方向与气泡运动方向相同时,随着树脂流速的增加,气泡的运动速度明显增大;而流动方向相反时,随着树脂流速的增加,气泡的运动速度呈明显下降的趋势。所建立的气泡运动模型与实验结果基本吻合。该研究结果将为热压成型过程中气泡运动模型的建立奠定基础。

关键词：复合材料树脂气泡孔隙

^(46,50)Ti+^(124)Sn熔合反应中耦合道效应的理论研究（英文）

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原子核物理评论 2017年第3期34卷 539-544页

作者：王兵赵维娟赵恩广周善贵郑州大学物理工程学院郑州450001 中国科学院理论物理研究所中国科学院理论物理前沿重点实验室北京100190 兰州重离子加速器国家实验室原子核理论中心兰州730000 中国科学院大学物理科学学院北京100049 湖南师范大学量子效应及其应用协同创新中心长沙410081

近库仑位垒重离子俘获与熔合是一个典型的多位垒穿透过程。在本征道的理论框架下,多反应道的耦合会使得单个位垒分离成一系列的分立位垒。基于位垒分布的思想,我们最近发展了一个经验的耦合道(ECC)模型,并系统地研究了220个反应体系的... 详细信息

近库仑位垒重离子俘获与熔合是一个典型的多位垒穿透过程。在本征道的理论框架下,多反应道的耦合会使得单个位垒分离成一系列的分立位垒。基于位垒分布的思想,我们最近发展了一个经验的耦合道(ECC)模型,并系统地研究了220个反应体系的俘获激发函数。最近,实验报道了熔合反应^(46,50)Ti+^(124)Sn俘获激发函数的测量结果。本文将简要介绍该ECC模型,并结合通用熔合函数(UFF)的约化方法,利用该模型研究熔合反应^(46,50)Ti+^(124)Sn中的耦合道效应。UFF的约化结果表明,相比于^(50)Ti+^(124)Sn,^(46)Ti+^(124)Sn的垒下俘获截面有额外的增强。ECC模型成功地再现了实验测得的俘获激发函数,并表明,^(46)Ti+^(124)Sn垒下俘获截面的额外增强来源于正Q值的中子转移效应。

关键词：位垒分布经验耦合道模型耦合道效应