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A CsI(Tl) detector array used in the experiment of the proton-rich nucleus ^(17)Ne

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Chinese Physics C 2009年第S1期33卷 176-178页

作者：马立英华辉卢飞陈东姜希遥叶沿林江栋兴 qureshi faisal-j.mil School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University

To investigate the configurations of the valence protons in Borromean nucleus 17Ne, a CsI(Tl) detector array, which consists of 9 CsI crystals (26×26×20mm3) coupled with photodiodes, has been successfully used in the 17Ne experiment to measure the energy of protons. In order to find the optimal working conditions and get the best energy resolutions, several technologies (including various wrapping materials, wrapping and coupling methods) have been used. The testing results showed that the best energy resolution of the CsI(Tl) is about 3.3% using the 241Am α-source. The primary testing results with the proton beam were also provided.

关键词： CsI(Tl) energy resolution proton

Study of the structure of borromean nucleus ^(17)Ne

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Chinese Physics C 2009年第S1期33卷 170-172页

作者：卢飞华辉叶沿林李智焕江栋兴马立英葛愉成郑涛宋玉收李湘庆 qureshi faisal-j.mil School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University

The 17Ne nucleus is a possible candidate with a two-proton borromean halo structure. Since the theoretical model is diffcult to handle the three-body system, it is diffcult to determine the two-proton halo structure in 17Ne. In the present research, we try to study the breakup reaction of 17Ne. For the Borromean nuclei, one-proton knockout results in an unstable nucleus which is decaying further by proton emission. This process will result in an angular correlation between the direction of the aligned recoiling unstable nucleus and its decay products. The angular correlations can give us information about the configuration of the valence proton in the 17Ne. Furthermore, theoretical calculations indicate that the momentum distributions of 16F c.m are sensitive to the structure of the halo in 17Ne. Thus the measurement of momentum distributions of 16F c.m may also give us conclusive information on the structure of 17Ne. The present experiment has been done at IMP in Lanzhou using the radioactive beam 17Ne at 30.8 MeV/u on a 43mg/cm2 12C target. The data analysis is under procedure and the primary results are provided.

关键词： two-proton halo 17Ne breakup reaction

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利用中高能破碎和敲出反应研究非稳定核结构

原子核物理评论 2010年第4期27卷 390-398页

作者：叶沿林 faisal j.mil-qureshi 楼建玲葛愉成吕林辉曹中鑫肖军李奇特陈天逸杨帆北京大学物理学院和核物理与核技术国家重点实验室北京100871

中高能区的破碎和敲出反应,由于机制相对简单、对核的表面敏感、理论处理比较成熟等原因,在非稳定核的晕结构、壳移动等奇特性质研究中发挥了独到作用。针对次级束流强度较弱、能散较大等特点,实验上发展和应用了逆运动学有效立体角完... 详细信息

中高能区的破碎和敲出反应,由于机制相对简单、对核的表面敏感、理论处理比较成熟等原因,在非稳定核的晕结构、壳移动等奇特性质研究中发挥了独到作用。针对次级束流强度较弱、能散较大等特点,实验上发展和应用了逆运动学有效立体角完全测量、轻重靶结合、高精度消色差磁谱仪、前向中子谱仪、在束γ测量等技术手段,大大提升了实验的探测能力和选择性。从物理问题探索和实验路线演变的角度,回顾了非稳定核破碎和敲出反应的发展过程与启示,并探讨未来的走向。

关键词：破碎反应非稳定核核结构反应机制核探测技术

Decline in subarachnoid haemorrhage volumes associated with the first wave of the COVID- 19 pandemic

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Stroke & Vascular Neurology 2021年第4期6卷 542-552,I0026-I0032页

作者： Thanh N Nguyen Diogo C Haussen Muhammad M qureshi Hiroshi Yamagami Toshiyuki Fujinaka Ossama Y Mansour Mohamad Abdalkader Michael Frankel Zhongming Qiu Allan Taylor Pedro Lylyk Omer F Eker Laura Mechtouff Michel Piotin Fabricio Oliveira Lima Francisco Mont'Alverne Wazim Izzath Nobuyuki Sakai Mahmoud Mohammaden Alhamza R Al-Bayati Leonardo Renieri Salvatore Mangiafico David Ozretic Vanessa Chalumeau Saima Ahmad Umair Rashid Syed Irteza Hussain Seby john Emma Griffin john Thornton jose Antonio Fiorot Rodrigo Rivera Nadia Hammami Anna M Cervantes-Arslanian Hormuzdiyar H Dasenbrock Huynh Le Vu Viet Quy Nguyen Steven Hetts Romain Bourcier Romain Guile Melanie Walker Malveeka Sharma Don Frei Pascal jabbour Nabeel Herial Fawaz Al-Mufti Atilla Ozcan Ozdemir Ozlem Aykac Dheeraj Gandhi Chandril Chugh Charles Matouk Pascale Lavoie Randall Edgell Andre Beer-Furlan Michael Chen Monika Killer-Oberpfalzer Vitor Mendes Pereira Patrick Nicholson Vikram Huded Nobuyuki Ohara Daisuke Watanabe Dong Hun Shin Pedro SC Magalhaes Raghid Kikano Santiago Ortega-Gutierrez Mudassir Farooqui Amal Abou-Hamden Tatsuo Amano Ryoo Yamamoto Adrienne Weeks Elena A Cora Rotem Sivan-Hoffmann Roberto Crosa Markus Möhlenbruch Simon Nagel Hosam Al-jehani Sunil A Sheth Victor S Lopez Rivera james E Siegler Achmad Fidaus Sani Ajit S Puri Anna Luisa Kuhn Gianmarco Bernava Paolo Machi Daniel G Abud Octavio M Pontes-Neto Ajay K Wakhloo Barbara Voetsch Eytan Raz Shadi Yaghi Brijesh P Mehta Naoto Kimura Mamoru Murakami jin Soo Lee ji Man Hong Robert Fahed Gregory Walker Eiji Hagashi Steve M Cordina Hong Gee Roh Ken Wong juan F Arenillas Mario Martinez-Galdamez jordi Blasco Alejandro Rodriguez Vasquez Luisa Fonseca M Luis Silva Teddy Y Wu Simon john Alex Brehm Marios Psychogios William j Mack Matthew Tenser Tatemi Todaka Miki Fujimura Roberta Novakovic jun Deguchi Yuri Sugiura Hiroshi Tokimura Rakesh Khatri Michael Kelly Lissa Peeling Yuichi Murayama Hugh Stephen Winters johnny Wong Mohamed Teleb jeremy Payne Hiroki Fukuda Kosuke Miyake junsuke Shimbo Yusuke Sug Neurology RadiologyBoston Medical CenterBostonMassachusettsUSA Neurology Marcus Stroke&Neuroscience CenterGrady Memorial HospitalEmory University School of MedicineAtlantaGAUSA Radiology Radiation OncologyBoston University School of MedicineBostonMassachusettsUSA Neurology National Hospital Organization Osaka National HospitalOsakaJapan Neurosurgery National Hospital Organization Osaka National HospitalOsakaJapan Neurology Alexandria UniversityAlexandriaEgypt Radiology Boston Medical CenterBostonMassachusettsUSA Department of Neurology Xinqiao HospitalChongqingChina Neurosurgery University of Cape TownRondeboschWestern CapeSouth Africa Neurosurgery Interventional NeuroradiologyClinica La Sagrada FamiliaBuenos AiresArgentina Neuroradiologie Neurologie VasculaireHospices Civils de LyonLyonAuvergne-Rhône AlpesFrance Neurologie Vasculaire Hospices Civils de LyonLyonAuvergne-Rhône AlpesFrance Interventional Neuroradiology Fondation Ophtalmologique Adolphe de RothschildParisÎle-de FranceFrance Neurology Hospital Geral de FortalezaFortalezaBrazil Interventional Neuroradiology Hospital Geral de FortalezaFortalezaBrazil Neuroradiology Nottingham University Hospitals NHS TrustNottinghamUK Department of Neurosurgery Kobe City Medical Center General HospitalKobeHyogoJapan Interventional Neurovascular Unit University Hospital CareggiFirenzeToscanaItaly Neuroradiology University Hospital Centre ZagrebZagrebCroatia Interventional Neuroradiology Hopital BicetreLe Kremlin-BicetreFrance Stroke and Interventional Neuroradiology Lahore General HospitalLahorePakistan Neurological Institute Cleveland Clinic Abu DhabiAbu DhabiUAE Department of Radiology Beaumont HospitalDublinIreland Neurology Stroke UnitHospital-Estadual CentralVitoriaBrazil Neuroradiology Instituto de Neurocirugia Dr AsengoSantiagoChile Interventional Neuroradiology Institut National de NeurologieTunisTunisia Neurology Boston Medical CenterBostonMassachusettsUSA Neurosurgery Boston Medical Center

Background During the COVID-19 pandemic,decreased volumes of stroke admissions and mechanical thrombectomy were *** study’s objective was to examine whether subarachnoid haemorrhage(SAH)hospitalisations and ruptured aneurysm coiling interventions demonstrated similar *** We conducted a cross-sectional,retrospective,observational study across 6 continents,37 countries and 140 comprehensive stroke *** with the diagnosis of SAH,aneurysmal SAH,ruptured aneurysm coiling interventions and COVID-19 were identified by prospective aneurysm databases or by International Classification of Diseases,10th Revision,*** 3-month cumulative volume,monthly volumes for SAH hospitalisations and ruptured aneurysm coiling procedures were compared for the period before(1 year and immediately before)and during the pandemic,defined as 1 March-31 May *** prior 1-year control period(1 March-31 May 2019)was obtained to account for seasonal *** There was a significant decline in SAH hospitalisations,with 2044 admissions in the 3 months immediately before and 1585 admissions during the pandemic,representing a relative decline of 22.5%(95%CI−24.3%to−20.7%,p<0.0001).Embolisation of ruptured aneurysms declined with 1170-1035 procedures,respectively,representing an 11.5%(95%CI−13.5%to−9.8%,p=0.002)relative *** analysis was noted for aneurysmal SAH hospitalisation decline from 834 to 626 hospitalisations,a 24.9%relative decline(95%CI−28.0%to−22.1%,p<0.0001).A relative increase in ruptured aneurysm coiling was noted in low coiling volume hospitals of 41.1%(95%CI 32.3%to 50.6%,p=0.008)despite a decrease in SAH admissions in this *** There was a relative decrease in the volume of SAH hospitalisations,aneurysmal SAH hospitalisations and ruptured aneurysm embolisations during the COVID-19 *** findings in SAH are consistent with a decrease in other emergencies,such as stroke and myocardial infarction.

关键词： diagnosis representing subarachnoid