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Angular Distributions of Intermediate Mass Fragments Emitted in 30 MeV/u 40Ar Induced Reactions

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Chinese Physics Letters 1999年第2期16卷 95-97页

作者： gou quan-bu ZHU Yong-tai XU Hu-shan WEI Zhi-yong LU Jun ZHANG Yu-hu WANG Qi LI Song-lin WU Zhong-li Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

The angular distributions of intermediate mass fragments with charge numbers from 3 to 24 emitted in 30 MeV/u 40Ar+58,64Ni and 115In reactions over an angular range of 5o-140ohave been *** different angular region an exponential distribution function dσ/dΩ=N exp(-θ/α)was used to fit the measured angular *** decay factor a which can be connected with the interaction time T and the factor N which is related to the intensity of the emission sources have been *** relationship ofα(Z)and N(Z)with Z for different reaction systems and different angular regions has been *** different behavior of dσ/dΩ,α(Z),and N(Z)for the three studied reaction systems exists mainly in the middle and backward angular *** dependencies of angular distributions on isospin and the size of reaction systems have also been discussed.

关键词： MeV/u angular backward

Target Dependence of N / Z Ratio of the Fragments Produced in 30 MeV/u ^(40)Ar Induced Reactions

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Chinese Physics Letters 1997年第6期14卷 413-416页

作者： XU Hu-shan ZHU Yong-tai WEI Zhi-yong LU Jun WANG Qi LI Song-lin ZHANG Yu-hu XIE Yuan-xiang WU Zhong-li ZHAO Qing-zhong gou quan-bu Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

An inclusive measurement was performed for 30 MeV/u ^(40)Ar+^(58,64)Ni and ^(115)*** employing the degree of freedom of N/Z,the production mechanism of the high energy component of the intermediate mass fragments(IMFs:3≤Z≤13)has been *** attention has been paid to the target dependence of N/Z ratio of the energetic *** IMFs may be produced by a projectile fragmentation process with energy dissipation.

关键词： MeV/u fragmentation inclusive

Half-Lives of Low-Lying Isomeric States in ^(169)Ta

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Chinese Physics Letters 1998年第2期15卷 92-94页

作者： ZHANG Yu-hu ZHAO Qing-zhong ZHU Shao-fei XU Hu-shan ZHOU Xiao-hong GUO Ying-xiang LEI Xiang-guo LU Jun gou quan-bu LIU Zhong JIN Han-juan LUO Yi-xiao SUN Xiang-fu ZHU Yong-tai Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

Two low-lying isomeric states in 169Ta have been identified via ^(159)Tb(l6O,6nγ)^(169)Ta *** half-lives are measured to be 28±5ns for the 9/2^(-)level and 17±4 ns for the 5/2^(-)level by using the delayedγ-γcoincidence *** two isomeric states are considered to be the bandheads with 9/2-[514]and 1/2-[541]configurations,*** neutron quasiparticle configuration for the ground state of ^(169)W is discussed.

关键词： reaction. method.

Semidecoupled Band and Shape Driving Effect of the π1/2^(-)[541] Orbital in ^(170)Ta

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Chinese Physics Letters 1997年第6期14卷 409-412页

作者： ZHANG Yu-hu ZHAO Qing-zhong ZHOU Xiao-hong XU Hu-shan GUO Ying-iang LEI Xiang-guo LU Jun ZHU Shao-fei gou quan-bu JIN Han-juan LIU Zhong LUO Yi-xiao SUN Xiang-fu ZHU Yong-tai Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

High spin states in ^(170)Ta have been studied via ^(159)Tb(^(16)O,5nγ)^(170)Ta reaction at 105MeV beam *** rotational bands have been observed among which one coupled band and an unfavoredΔI=2 transition sequence of the semidecoupled band are identified in this *** effects of theπ1/2^(-)[541]proton intruder orbital are qualitatively discussed.

关键词： energy.

Detector Calibration by Monte Carlo Simulation Based on the Energy-Range Relationship of Energetic Ions

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Chinese Physics Letters 1999年第1期16卷 15-17页

作者： FANG De-qing FENG Jun CAI Xiang-zhou WANG Jian-song SHEN Wen-qing MA Yu-gang ZHU Yong-tai LI Song-lin WU He-Yu gou quan-bu JIN Gen-ming ZHAN Wen-long GUO Zhong-yan XIAO Guo-qing Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

The experimental measurement of the total interaction cross sections of N,C,B,and Be isotopes on 12C target at medium energies is described.A new formula that gives a good description of the energy-range relationship of energetic ions over a wide energy range is *** energy calibration of detectors is made by a Monte Carlo simulation method based on this new formula.

关键词： formula interaction Energetic

Isospin Effect of Fragmentation Reaction on the Isotopic Distribution Producedin Intermediate Energy Heavy Ion Collisions

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Chinese Physics Letters 2000年第4期17卷 267-269页

作者： FANG De-Qing SHEN Wen-Qing FENG Jun CAI Xiang-Zhou WANG Jian-song SU Qian-Min MA Yu-Gang Zhu Yong-tai LI Song-Lin WU He-Yu gou quan-bu JIN Gen-Ming ZHAN Wen-Long GUO Zhong-Yan XIAO Guo-Qing Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

Fragments produced in the reaction of 60 MeV/n^(18)O on Be have been measured *** isotopic distribution of fragmentation reaction is well reproduced by a modified statistical abrasion-ablation model It is predicted that the isotopic distribution shifts toward the neutron rich side for neutron rich projectile,but this isospin effect decreases with the increase of the atomic number difference Z-Z_(A)and disappears at last,where Z and Z_(A)are atomic numbers of the isotopic distribution and the projectile respectively.

关键词： distribution atomic Collisions

J-family genes redundantly regulate flowering time and increase yield in soybean

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The Crop Journal 2024年第3期12卷 944-949页

作者： Haiyang Li Zheng Chen Fan Wang Hongli Xiang Shuangrong Liu Chuanjie gou Chao Fang Liyu Chen Tiantian bu Fanjiang Kong Xiaohui Zhao Baohui Liu Xiaoya Lin Guangdong Key Laboratory of Plant Adaptation and Molecular Design/Guangzhou Key Laboratory of Crop Gene Editing/Innovative Center of Molecular Genetics and Evolution School of Life SciencesGuangzhou UniversityGuangzhou 510006GuangdongChina

Soybean(Glycine max)is a short-day crop whose flowering time is regulated by *** longjuvenile trait extends its vegetative phase and increases yield under short-day *** variation in J,the major locus controlling this trait,modulates flowering *** report that the three J-family genes influence soybean flowering time,with the triple mutant Guangzhou Mammoth-2 flowering late under short days by inhibiting transcription of E1-family genes.J-family genes offer promising allelic combinations for breeding.

关键词： Soybean Flowering time Yield J-family genes

Measurements of Total Reaction Cross Section for Light Nuclei and Evidence for the Anomalous Nuclear Structure in ^(15)C

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Chinese Physics Letters 2000年第9期17卷 655-657页

作者： FANG De-Qing SHEN Wen-Qing FENG Jun CAI Xiang-Zhou WANG Jian-song SU Qian-Min ZHANG Hu-Yong HU Peng-Yun MA Yu-Gang Zhu Yong-tai LI Song-Lin WU He-Yu gou quan-bu JIN Gen-Ming ZHAN Wen-Long GUO Zhong-Yan XIAO Guo-Qing Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of Modern Physics Chinese Academy of SciencesLanzhuo 730000

Measurements of the total reaction cross section for^(12-16)C,^(14-17)N and^(16-18)O on carbon target at intermediate energies were performed on RIBLL of HIRFL.A larger enhancement ofσR for^(15)C was observed than that for its *** analysis of these data indicates possible existence of an anomalous nuclear structure in^(15)C.A new quantity was suggested as the criterion to distinguish anomalous structure nuclei from normal nuclei.

关键词： criterion structure neighbor

Application of deep learning methods combined with physical background in wide field of view imaging atmospheric Cherenkov telescopes

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Nuclear Science and Techniques 2024年第4期35卷 208-220页

作者： Ao-Yan Cheng Hao Cai Shi Chen Tian-Lu Chen Xiang Dong You-Liang Feng Qi Gao quan-bu gou Yi-Qing Guo Hong-Bo Hu Ming-Ming Kang Hai-Jin Li Chen Liu Mao-Yuan Liu Wei Liu Fang-Sheng Min Chu-Cheng Pan Bing-Qiang Qiao Xiang-Li Qian Hui-Ying Sun Yu-Chang Sun Ao-Bo Wang Xu Wang Zhen Wang Guang-Guang Xin Yu-Hua Yao Qiang Yuan Yi Zhang School of Physics and Technology Wuhan UniversityWuhan 430072China School of Physics and Astronomy Yunnan UniversityKunming 650091China Ministry of Education The Key Laboratory of Cosmic Rays(Tibet University)Lhasa 850000China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences 19 A Yuquan RoadShijingshan DistrictBeijing 100049China College of Physics Sichuan UniversityChengdu 610064China School of Intelligent Engineering Shandong Management UniversityJinan 250357China Tsung‑Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China Suzhou Aerospace Information Research Institute Suzhou 215123China College of Physics Chongqing UniversityNo.55 Daxuecheng South RoadHigh‑tech DistrictChongqing 401331China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210008China

The High Altitude Detection of Astronomical Radiation(HADAR)experiment,which was constructed in Tibet,China,combines the wide-angle advantages of traditional EAS array detectors with the high-sensitivity advantages of focused Cherenkov *** objective is to observe transient sources such as gamma-ray bursts and the counterparts of gravitational *** study aims to utilize the latest AI technology to enhance the sensitivity of HADAR *** datasets and models with distinctive creativity were constructed by incorporating the relevant physical theories for various *** models can determine the type,energy,and direction of the incident particles after careful *** obtained a background identification accuracy of 98.6%,a relative energy reconstruction error of 10.0%,and an angular resolution of 0.22°in a test dataset at 10 *** findings demonstrate the significant potential for enhancing the precision and dependability of detector data analysis in astrophysical *** using deep learning techniques,the HADAR experiment’s observational sensitivity to the Crab Nebula has surpassed that of MAGIC and *** energies below 0.5 TeV and remains competitive with conventional narrow-field Cherenkov telescopes at higher *** addition,our experiment offers a new approach for dealing with strongly connected,scattered data.

关键词： VHE gamma-ray astronomy HADAR Deep learning Convolutional neural networks