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Risk factors for renal outcomes in children with antineutrophil cytoplasmic antibody-associated vasculitis:a nationwide retrospective study in China

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World Journal of Pediatrics 2024年第5期20卷 506-516页

作者： Li-Wen Tan jun-Li Wan Chun-Hua Zhu Hong Xu Zheng-Kun xia Li-Zhi Chen xiao-Chuan Wu Fang Wang xiao-Rong Liu Cheng-Guang Zhao xiao-Zhong Li Jian-Hua Mao xiao-Wen Wang Wen-Yan Huang Yu-Hong Li Jian-jiang Zhang Shi-Pin Feng jun Yang Jiao-Jiao Liu Chun-lin Gao Li-Ping Rong Lan-jun Shuai ke Xu He-Jia Zhang qiu Li Ai-Hua Zhang Mo Wang Department of Nephrology Children’s Hospital of Chongqing Medical UniversityZhongshan 2nd Rd.136Chongqing400014China Ministry of Education key Laboratory of Child Development and Disorders National Clinical Research Center for Child Health and DisordersChina International Science and Technology Cooperation Base of Child Development and Critical DisordersChildren’s Hospital of Chongqing Medical UniversityChongqingChina Chongqing key Laboratory of Pediatrics Children’s Hospital of Chongqing Medical UniversityChongqingChina Department of Nephrology Children’s Hospital of Nanjing Medical University72 Guangzhou RoadNanjing210008China Department of Nephrology Children’s Hospital of Fudan UniversityNational Paediatric Medical Center of ChinaShanghaiChina Department of Pediatrics Jinling HospitalNanjing Medical UniversityNanjingChina Department of Pediatrics Jinling HospitalThe First School of Clinical MedicineSouthern Medical UniversityNanjingChina Department of Pediatrics Jinling HospitalMedical School of Nanjing UniversityNanjingChina Department of Pediatric Nephrology and Rheumatology The First Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina Department of Pediatrics The Second Xiangya Hospital of Central South UniversityChangshaChina Department of Pediatrics Peking University First HospitalBeijingChina Department of Nephrology Beijing Children’s HospitalCapital Medical UniversityBeijing100045China National Center for Children’s Health BeijingChina Department of Pediatrics Shengjing Hospital of China Medical UniversityShenyangChina Department of Nephrology and Immunology Children’s Hospital of Soochow UniversitySuzhouChina Department of Nephrology Children HospitalZhejiang University School of MedicineHangzhouChina Department of Nephrology Wuhan Children’s Hospital(Wuhan Maternal and Child Healthcare Hospital)Tongji Medical CollegeHuazhong University of Science&TechnologyWuhanChina Department of Nephrology and Rheumatology Shanghai Children’s HospitalSchool

Background Pediatric antineutrophil cytoplasmic antibody-associated vasculitis(AAV)is a life-threatening systemic vasculitis featured by liability to renal ***,there are few studies on the risk factors and predictive models for renal outcomes of AAV in *** Data from 179 AAV children in multiple centers between January 2012 and March 2020 were collected *** risk factors and predictive model of end-stage renal disease(ESRD)in AAV were *** Renal involvement was the most typical manifestation(95.5%),and the crescent was the predominant pathological lesion(84.9%).The estimated glomerular filtration rate(eGFR)was evaluated in 114 patients,of whom 59.6%developed ESRD,and the median time to ESRD was 3.20 *** eGFR[P=0.006,odds ratio(OR)=0.955,95%confidence interval(CI)=0.924–0.987]and the percentages of global glomerulosclerosis(pGGS;P=0.018,OR=1.060,95%CI=1.010–1.112)were independent risk factors for ESRD of renal *** on the pGGS and eGFR at renal biopsy,we developed three risk grades of ESRD and one predictive *** Kaplan‒Meier curve indicated that renal outcomes were significantly different in different risk grades(Pline,the predictive model had higher accuracy(0.86 versus 0.58,P<0.001)and a lower coefficient of variation(0.07 versus 0.92)in external *** Renal involvement is the most common manifestation of pediatric AAV in China,of which more than half deteriorates into *** predictive model based on eGFR at renal biopsy and the pGGS may be stable and accurate in speculating the risk of ESRD in AAV children.

关键词： Antineutrophil cytoplasmic antibody End-stage renal disease Glomerulonephritis Pediatric nephrology Vasculitis

MOSS:An Open Conversational Large Language Model

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Machine Intelligence Research 2024年第5期21卷 888-905页

作者： Tianxiang Sun xiaotian Zhang Zhengfu He Peng Li Qinyuan Cheng xiangyang Liu Hang Yan Yunfan Shao Qiong Tang Shiduo Zhang Xingjian Zhao ke Chen Yining Zheng Zhejian Zhou Ruixiao Li jun Zhan Yunhua Zhou linyang Li xiaogui Yang lingling Wu Zhangyue Yin Xuanjing Huang Yu-Gang jiang Xipeng qiu Fudan University Shanghai200438China

Conversational large language models(LLMs)such as ChatGPT and GPT-4 have recently exhibited remarkable capabilities across various domains,capturing widespread attention from the *** facilitate this line of research,in this paper,we report the development of MOSS,an open-sourced conversational LLM that contains 16 B parameters and can perform a variety of instructions in multi-turn interactions with *** base model of MOSS is pre-trained on large-scale unlabeled English,Chinese,and code *** optimize the model for dialogue,we generate 1.1 M synthetic conversations based on user prompts collected through our earlier versions of the model *** then perform preference-aware training on preference data annotated from AI *** results on real-world use cases and academic benchmarks demonstrate the effectiveness of the proposed *** addition,we present an effective practice to augment MOSS with several external *** the development of MOSS,we have established a complete technical roadmap for large language models from pre-training,supervised fine-tuning to alignment,verifying the feasibility of chatGPT under resource-limited conditions and providing a reference for both the academic and industrial *** weights and code are publicly available at https://***/OpenMOSS/MOSS.

关键词： Large language models natural language processing pre-training alignment chatGPT MOSS

Combination therapy with oncolytic virus and T cells or mRNA vaccine amplifies antitumor effects

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2655-2668页

作者： Rao Fu Ruoyao Qi Hualong Xiong Xing Lei Yao jiang Jinhang He Feng Chen Liang Zhang Dekui qiu Yiyi Chen Meifeng Nie Xueran Guo Yuhe Zhu Jinlei Zhang Mingxi Yue Jiali Cao Guosong Wang Yuqiong Que Mujing Fang yingbin Wang Yixin Chen Tong Cheng Shengxiang Ge jun Zhang Quan Yuan Tianying Zhang Ningshao xia State key Laboratory of Vaccines for Infectious Diseases Xiang An Biomedicine LaboratoryDepartment of Laboratory MedicineSchool of Public Health&School of Life SciencesXiamen UniversityXiamen 361102 FujianChina National Institute of Diagnostics and Vaccine Development in Infectious Diseases Xiamen 361102 FujianChina

Antitumor therapies based on adoptively transferred T cells or oncolytic viruses have made significant progress in recent years,but the limited efficiency of their infiltration into solid tumors makes it difficult to achieve desired antitumor effects when used *** this study,an oncolytic virus(rVSV-LCMVG)that is not prone to induce virus-neutralizing antibodies was designed and combined with adoptively transferred T *** transforming the immunosuppressive tumor microenvironment into an immunosensitive one,in B16 tumor-bearing mice,combination therapy showed superior antitumor effects than *** occurred whether the OV was administered intratumorally or *** therapy significantly increased cytokine and chemokine levels within tumors and recruited CD8^(+)T cells to the TME to trigger antitumor immune *** with adoptively transferred T cells and subsequent oncolytic virotherapy sensitizes refractory tumors by boosting T-cell recruitment,downregulating the expression of PD-1,and restoring effector T-cell *** offer a combination therapy with greater translational value,mRNA vaccines were introduced to induce tumor-specific T cells instead of adoptively transferred T *** combination of OVs and mRNA vaccine also displays a significant reduction in tumor burden and prolonged *** study proposed a rational combination therapy of OVs with adoptive T-cell transfer or mRNA vaccines encoding tumor-associated antigens,in terms of synergistic efficacy and mechanism.

关键词： transferred rational boosting

Prevalence and serotype distribution of nasopharyngeal carriage of Streptococcus pneumoniae among healthy children under 5 years of age in Hainan Province, China

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Infectious Diseases of Poverty 2024年第1期13卷 42-52页

作者： Jian Wang Li qiu Shuang Bai Wei Zhao Ao Zhang Jing Li jun-Nan Zhang Shan-Shan Zhou Ren qiu Zhu Huang Jv-xia Liu Ting-Bin Wang Xue Sun jiang Wu Qun Zheng Bin He Min Lv Beijing Center for Disease Prevention and Control BeijingChina Beijing Research Center for Respiratory Infectious Diseases BeijingChina Hainan Provincial Center for Disease Control and Prevention HaikouChina Haikou Center for Disease Control and Prevention HaikouHainanChina Wanning Center for Disease Control and Prevention WanningHainanChina Baisha County Center for Disease Control and Prevention BaishaHainanChina Qiongzhong County Center for Disease Control and Prevention QiongzhongHainanChina

Background The thirteen-valent pneumococcal conjugate vaccine(PCV13)is not included in the national immu-nization program and is administered voluntarily with informed consent in *** preparation for assessing the impact of pilot introduction in Hainan Province,we conducted a carriage study among children under 5 years of age from four locations in Hainan Province,*** From March to june 2022,nasopharyngeal(NP)swabs,collected from healthy children aged younger than 59 months who lived in the 4 different locations(Haikou,Wanning,Baisha and Qiongzhong)in Hainan Province,were tested for pneumococcus using conventional *** isolates were serotyped using the Quel-lung *** factors associated with pneumococcal colonization were assessed using univariate analysis and multivariable logistic regression adjusting for age,daycare attendance and other *** Pneumococcus was isolated in 710(30.4%)of the 2333 children *** 737 pneumococci,29 serotypes were identifed;60.9%were PCV13 serotypes;the most common vaccine serotypes were 6B(20.4%),19F(13.0%),6A(11.9%)and 23F(6.1%);and the most common nonvaccine serotypes were 23A(12.9%),34(6.1%)and nontypeable(NT)pneumococci(5.6%).Children vaccinated with PCV13 had lower carriage(17.7%vs 32.5%;P=0.0001)and fewer PCV13 serotypes(41.9%vs 62.7%;P=0.0017)compared to unimmunized *** adjustment,NP carriage Was higher among children attending daycare(aOR=2.3,95%CI:1.7-3.2),living in rural areas(aOR=1.4,95%CI:1.1-1.8),living with siblings(aOR=1.3,95%CI:1.0-1.6)and whose mothers had completed senior high/technical sec-ondary school(aOR=1.5,95%CI:1.1-2.0).In contrast,completion of 3-4 doses of PCV13 were associated with a lower carriage rate(aOR=0.6,95%CI:0.4-0.9).Conclusions We established the baseline of pneumococcal carriage,serotype distribution and PCV13 immuni-zation rates among healthy children under 5 years of age in Hainan Province,prior to the introduction of PCV13 into th

关键词： Pneumococcus Nasopharyngeal carriage Serotypes distribution Children Hainan Province China

Genome assembly of autotetraploid Actinidia arguta highlights adaptive evolution and enables dissection of important economic traits

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Plant Communications 2024年第6期5卷 173-192页

作者： Xue-Mei Lu xiao-Fen Yu Guo-Qiang Li Ming-Hao Qu Huan Wang Chuang Liu Yu-Ping Man xiao-Han jiang Mu-Zi Li Jian Wang Qi-Qi Chen Rui Lei Cheng-Cheng Zhao Yun-qiu Zhou Zheng-Wang jiang Zuo-Zhou Li Shang Zheng Chang Dong Bai-lin Wang Yan-xiang Sun Hui-Qin Zhang Jie-Wei Li Quan-Hui Mo ying Zhang Xin Lou Hai-Xu Peng Ya-Ting Yi He-Xin Wang Xiu-jun Zhang Yi-Bo Wang Dan Wang Li Li Qiong Zhang Wen-xia Wang Yongbo Liu Lei Gao Jin-Hu Wu Yan-Chang Wang CAS key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenChinese Academy of SciencesWuhanHubeiChina key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhouGansuChina College of Life Sciences University of Chinese Academy of SciencesBeijingChina Wuhan Frasergen Bioinformatics Co. LtdWuhanHubeiChina Institute of Soil and Fertilizer Anhui Academy of Agricultural SciencesHefeiChina College of Agricultural Sciences Xichang UniversityXichangSichuanChina Department of Horticulture Heilongjiang Academy of Agricultural SciencesHarbinHeilongjiangChina College of Life Sciences Langfang Normal UniversityLangfangHebeiChina Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhouZhejiangChina Guangxi Institute of Botany Chinese Academy of SciencesGuilinGuangxiChina Xi’an Botanical Garden of Shaanxi Province Institute of Botany of Shaanxi ProvinceXi’anShaanxiChina Institute of Modern Agricultural Research Dalian UniversityDalianLiaoningChina Bioinformatics Center College of Plant Science and TechnologyBeijing University of AgricultureBeijingChina College of Agriculture Eastern Liaoning UniversityDandongLiaoningChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalianLiaoningChina State Environmental Protection key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental SciencesBeijingChina Hubei Hongshan Laboratory WuhanHubeiChina The New Zealand Institute for Plant and Food Research Limited AucklandNew Zealand

Actinidia arguta,the most widely distributed Actinidia species and the second cultivated species in the genus,can be distinguished from the currently cultivated Actinidia chinensis on the basis of its small and smooth fruit,rapid softening,and excellent cold *** evolution of tetraploid Actinidia species and the genetic basis of their important agronomic traits are still ***,we generated a chromosome-scale genome assembly of an autotetraploid male *** *** genome assembly was 2.77 Gb in length with a contig N50 of 9.97 Mb and was anchored onto 116 *** and clustering of 101 geographically representative accessions showed that they could be divided into two geographic groups,Southern and Northern,which first diverged 12.9 million years *** underwent two prominent expansions and one demographic bottleneck from the midPleistocene climate transition to the late *** genomics studies using paleoclimate data enabled us to discern the evolution of the species’adaptation to different historical *** genes(AaCEL1,AaPME1,and AaDOF1)related to flesh softening were identified by multi-omics analysis,and their ability to accelerate flesh softening was verified through transient expression assays.A set of genes that characteristically regulate sexual dimorphism located on the sex chromosome(Chr3)or autosomal chromosomes showed biased expression during stamen or carpel *** chromosome-level assembly of the autotetraploid *** genome and the genes related to important agronomic traits will facilitate future functional genomics research and improvement of ***.

关键词： kiwiberry dioecism adaptive evolution paleoclimate GEA rapid softening

RGS22 maintains the physiological function of ependymal cells to prevent hydrocephalus

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Science China Life Sciences 2024年

作者： Xue Pang lin Gu qiu-ying Han Jia-Qing Xing Ming Zhao Shao-Yi Huang jun-Xi Yi Jie Pan Hao Hong Wen Xue Xue-Qing Zhou Zhi-Hui Su Xin-Ran Zhang Li-Ming Sun Shao-Zhen jiang Dan Luo ling Chen Zheng-Jie Wang Yu Yu Tian xia Xue-Min Zhang Ai-ling Li Tao Zhou Hong Cai Tao Li Nanhu Laboratory National Center of Biomedical Analysis School of Basic Medical Sciences Fudan University Department of Basic Medical Sciences School of Medicine Tsinghua University

Ependymal cells line the wall of cerebral ventricles and ensure the unidirectional cerebrospinal fluid （CSF） flow by beating their motile cilia coordinately. The ependymal denudation or ciliary dysfunction causes hydrocephalus. Here, we report that the deficiency of regulator of Gprotein signaling 22 （RGS22） results in severe congenital hydrocephalus in both mice and rats. Interestingly, RGS22 is specifically expressed in ependymal cells within the brain. Using conditional knock-out mice, we further demonstrate that the deletion of Rgs22 exclusively in nervous system is sufficient to induce hydrocephalus. Mechanistically, we show that Rgs22 deficiency leads to the ependymal denudation and impaired ciliogenesis. This phenomenon can be attributed to the excessive activation of lysophosphatidic acid receptor （LPAR） signaling under Rgs22–/–condition, as the LPAR blockade effectively alleviates hydrocephalus in Rgs22–/–rats. Therefore, our findings unveil a previously unrecognized role of RGS22 in the central nervous system, and present RGS22 as a potential diagnostic and therapeutic target for hydrocephalus.

关键词：

XELOX(capecitabine plus oxaliplatin)plus bevacizumab(anti-VEGF-A antibody)with or without adoptive cell immunotherapy in the treatment of patients with previously untreated metastatic colorectal cancer:a multicenter,open-label,randomized,controlled,phase 3 trial

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Signal Transduction and Targeted Therapy 2024年第5期9卷 2104-2113页

作者： qiu-Zhong Pan Jing-Jing Zhao Liang Liu Dong-Sheng Zhang Li-Ping Wang Wen-Wei Hu De-Sheng Weng xiang Xu Yi-Zhuo Li Yan Tang Wei-Hong Zhang Jie-Yao Li xiao Zheng Qi-Jing Wang Yong-Qiang Li Tong xiang Li Zhou Shuang-Ning Yang Chen Wu Rong-Xing Huang Jia He Wei-Jiao Du Lu-jun Chen Yue-Na Wu Bin Xu Qiong Shen Yi Zhang Jing-Ting jiang Xiu-bao Ren Jian-Chuan xia State key Laboratory of Oncology in South China Guangdong Provincial Clinical Research Center for CancerCollaborative Innovation Center for Cancer MedicineSun Yat-Sen University Cancer CenterGuangzhouGuangdong 510060PR China Department of Biotherapy Sun Yat-Sen University Cancer CenterGuangzhouGuangdong 510060PR China Tianjin Medical University Cancer Institute and Hospital National Clinical Research Center for CancerTianjin 300060PR China key Laboratory of Cancer Immunology and Biotherapy Tianjin 300060PR China Department of Biotherapy/Immunology Tianjin Medical University Cancer Institute and HospitalTianjin 300060PR China Department of Medical Oncology Sun Yat-sen University Cancer CenterGuangzhou 510060PR China Department of Oncology the First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052PR China Department of Tumor Biological Treatment the Third Affiliated Hospital of Soochow UniversityChangzhouJiangsu 213003PR China jiangsu Engineering Research Center for Tumor Immunotherapy ChangzhouJiangsu 213003PR China Institute for Cell Therapy of Soochow University ChangzhouJiangsu 213003PR China Department of Stem Cell&Regenerative Medicine State Key Laboratory of TraumaBurn and Combined InjuryDaping HospitalArmy Medical UniversityChongqing 400042PR China Imaging Diagnosis and Interventional Center Sun Yat-sen University Cancer CenterGuangzhouGuangdong 510060PR China

Fluoropyrimidine-based combination chemotherapy plus targeted therapy is the standard initial treatment for unresectable metastatic colorectal cancer(mCRC),but the prognosis remains *** phase 3 trial(***:NCT03950154)assessed the efficacy and adverse events(AEs)of the combination of PD-1 blockade-activated DC-CIK(PD1-T)cells with XELOX plus bevacizumab as a first-line therapy in patients with mCRC.A total of 202 participants were enrolled and randomly assigned in a 1:1 ratio to receive either first-line XELOX plus bevacizumab(the control group,n=102)or the same regimen plus autologous PD1-T cell immunotherapy(the immunotherapy group,n=100)every 21 days for up to 6 cycles,followed by maintenance treatment with capecitabine and *** main endpoint of the trial was progression-free survival(PFS).The median follow-up was 19.5 *** PFS was 14.8 months(95%CI,11.6-18.0)for the immunotherapy group compared with 9.9 months(8.0-11.8)for the control group(hazard ratio[HR],0.60[95%CI,0.40-0.88];p=0.009).Median overall survival(OS)was not reached for the immunotherapy group and 25.6 months(95%CI,18.3-32.8)for the control group(HR,0.57[95%CI,0.33-0.98];p=0.043).Grade 3 or higher AEs occurred in 20.0%of patients in the immunotherapy group and 23.5%in the control groups,with no toxicity-associated deaths *** addition of PD1-T cells to first-line XELOX plus bevacizumab demonstrates significant clinical improvement of PFS and OS with well tolerability in patients with previously untreated mCRC.

关键词： PD1 immunotherapy bevacizumab

Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang xiang‑Biao qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin lin Chang‑jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai jiang‑Bo Bai Jie bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei‑Hua Jia Hao‑Yu jiang Wei jiang Zhi‑Jie jiang Zheng‑Yao Jin ling Kang Bo Li Chao Li Gong Li Jia‑Wen Li xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Zhi‑Xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen xiao‑Guang Wu Xuan Wu Li‑Kun Xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑Hui Zhang lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou ke‑jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang xiang‑Biao qiu Zhen Chen Mao‑Yuan Zhao Chang‑jun Ning Kai Pan Wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang xiao‑Yang Sun Qi An Hao‑Fan Bai jiang‑Bo Bai Jie bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei jiang Zhi‑Jie jiang Zheng‑Yao Jin ling Kang Bo Li Gong Li xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Kang Sun Zhi‑Xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen xiao‑Guang Wu Xuan Wu Cong xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang lin‑Hao Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Zhi‑Hao Zhou ke‑jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China China Academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China China Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the China Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification