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稍高于库仑位垒的238U束引起跟随裂变反应中的壳效应

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Chinese Physics C 1985年第4期 454-460页

作者：戴光曦 R.玻克 A.郭比 S.格拉拉 K.D.海登勃朗特 J.库兹明茨基 U.李能 W.f.J.米勒 A.奥米 H.斯特茨 J.脱克 S.毕扬霍姆中国科学院近代物理研究所 GSI 西德 GSI 西德 GSI 西德 GSI 西德 GSI 西德 GSI 西德 GSI 西德 GSI 西德 GSI 西德 GSI 西德 NBI丹麦

本实验测量了238U（5.4MeV/u）轰击48Ca、45Sc靶和238U（6.0MeV/u）轰击16O、27A1、48Ca、45sc、48Ti、58fe、64Ni及89Y靶等10个反应系统的三体碎片符合出射道。得到了跟随裂变截面、总动能损失、碎片动能和质量分布以及碎片在第一质心... 详细信息

本实验测量了238U（5.4MeV/u）轰击48Ca、45Sc靶和238U（6.0MeV/u）轰击16O、27A1、48Ca、45sc、48Ti、58fe、64Ni及89Y靶等10个反应系统的三体碎片符合出射道。得到了跟随裂变截面、总动能损失、碎片动能和质量分布以及碎片在第一质心与第二质心的角分布等。实验用了4片200ram×300mm的双维位敏雪崩计数器,给出了关联的空间位置信息与飞行时间。三体事件用运动学直接求解,其中识别裂变对碎片是基于该对之间相对速度为2.4cm/ns的事实。探测几何效率用蒙特卡罗模拟计算来确定。实验表明,跟随裂变源于准弹性散射,其截面σS·f较大,对于27Al靶,σS·f为总截面的15％,而89Y靶为70％。同时发现,对于幻核靶,σS·f与索末费尔得参数之间有简单的线性关系。

关键词：裂变反应位垒裂变壳效应碎片铀核裂变铀裂变三体幻核出射道准弹性散射质量谱裂变截面

Revisit to Two-Proton Radioactivity of 19Mg and Observation of Two-Proton Decay of 30Ar

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原子核物理评论 2016年第2期33卷 197-202页

作者：徐晓栋 I.Mukha L.Acosta E.Casarejos A.A.Ciemny W.Dominik J.Duénas-Díaz V.Dunin J.M.Espino A.Estradé f.farinon H.Geissel A.fomichev T.A.Golubkova A.Gorshkov L.V.Grigorenko Z.Janas G.Kamiński O.Kiselev R.Knbel S.Krupko M.Kuich Yu.A.Litvinov G.Marquinez-Dur'an I.Martel C.Mazzocchi C.Nociforo A.K.Ord'uz M.Pfützner S.Pietri M.Pomorski A.Prochazka S.Rymzhanova A.M.S'anchez-Benítez C.Scheidenberger P.Sharov H.Simon B.Sitar R.Slepnev M.Stanoiu P.Strmen I.Szarka M.Takechi Y.K.Tanaka H.Weick M.Winkler J.S.Winfield Ⅱ.Physikalisches Institut Justus-Liebig-Universitt Gie?en GSI Helmholtzzentrum für Schwerionenforschung Gmb H School of Physics and Nuclear Energy Engineering Beihang University National Research Centre "Kurchatov Institute" INfN Laboratori Nazionali del Sud Instituto de física Universidad Nacional Autónoma de México University of Vigo faculty of Physics University of Warsaw Department of Applied Physics University of Huelva Veksler and Baldin Laboratory of High Energy Physics Department of Atomic Molecular and Nuclear PhysicsUniversity of Seville University of Edinburgh flerov Laboratory of Nuclear Reactions Advanced Educational and Scientific Center Moscow State University fSBI "SSC Rf ITEP"of NRC "Kurchatov Institute" National Research Nuclear University "MEPh I" Institute of Nuclear Physics PAN faculty of Physics Warsaw University of Technology faculty of Mathematics and Physics Comenius University IfIN-HH University of Tokyo

An experiment aimed to investigate the two-proton(2p) decay of the previously unknown nucleus ^(30)Ar was performed at GSI. By tracking the decay products in-flight with silicon micro-strip detectors, the 2p decays of ^(30)Ar were observed for the first time. for the calibration purpose, 2p decays of ^(19)Mg were also remeasured by tracking the coincident ^(17)Ne+p+p trajectories. By comparing the measured angular p-17 Ne correlations with those obtained from the corresponding Monte carlo simulations,the simultaneous 2p decay of ^(19)Mg ground state and the sequential 2p emission of several known excited states of ^(19)Mg were confirmed. One new excited state in ^(19)Mg and two new excited states in ^(18)Na were observed.

关键词： proton drip line decay by proton emission nuclear energy level

流的偏心率——在相对论性重离子碰撞过程中初态物质的椭圆流涨落和横向局域化证据(英文)

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高能物理与核物理 2007年第12期31卷 1133-1136页

作者： S.Manly B.Alver B.B.Back M.D.Baker M.Ballintijn D.S.Barton R.R.Betts R.Bindel W.Busza Z.Chai V.Chetluru E.Garcfa T.Gburek K.Gulbrandsen J.Hamblen I.Harnarine C.Henderson D.J.Hofman R.S.Hollis R.Hoiynski B.Holzman A.Iordanova J.L.Kane P.Kulinich C.M.Kuo W.Li W.T.Lin C.Loizides S.Manly A.C.Mignerey R.Nouicer A.Olszewski R.Pak C.Reed E.Richardson C.Roland G.Roland J.Sagerer I.Sedykh C.E.Smith M.A.Stankiewicz P.Steinberg G.S.f.Stephans A.Sukhanov A.Szostak M.B.Tonjes A.Trzupek G.J.van Nieuwenhuizen S.S.Vaurynovich R.Verdier G.I.Veres P.Walters E.Wenger D.Willhelm f.L.H.Wolfs B.Wosiek K.Wozniak S.Wyngaardt B.Wyslouch Physics Division Argonne National Laboratory Argonne IL 60439-4843 USA Chemistry and C-A Departments Brookhaven National Laboratory Upton NY 11973-5000 USA Institute of Nuclear Physics PAN Krakdw Poland Laboratory for Nuclear Science Massachusetts Institute of Technology Cambridge MA 02139-4307 USA Department of Physics National Central University Chung-Li Department of Physics University of Illinois at Chicago Chicago IL 60607-7059 USA Department of Chemistry and Biochemistry University of Maryland College Park MD 20742 USA Department of Physics and Astronomy University of Rochester Rochester NY 14627 USA

Recent measurements of event-by-event elliptic flow in Au+Au collisions at S_(NN)^(1/2)=200GeV exhibit large relative fluctuations of about 40%—50%.The data are well described by fluctuations in the shape of the initial collision region,as estimated event-by-event with the participant eccentricity using Glauber Monte *** results,combined with the demonstrated participant eccentricity scaling of the elliptic flow across nuclear species,constitute evidence of transverse granularity in the initial matter production in these collisions.

关键词：横向定位 RHIC 相对论重离子碰撞原始态流量波动椭圆流

flux variations of cosmic ray air showers detected by LHAASO-KM2A during a thunderstorm on June 10,2021

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Chinese Physics C 2023年第1期47卷 193-203页

作者： f.Aharonian 安琪阿西克古白立新白云翔包逸炜 D.Bastieri 毕效军毕玉江蔡金庭曹喆曹臻常进常劲帆陈恩生陈良陈亮陈龙陈明君陈玛丽陈素弘陈松战陈天禄陈学健陈阳程皓麟程宁程耀东崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.della Volpe 段凯凯樊军辉范一中范志香方军方堃冯存峰封莉冯少辉丰晓婷冯有亮高博高川东高林青高启高卫高伟康葛茂茂耿利斯龚光华苟全补顾旻皓郭福来郭俊广郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何思乐何新波何钰 M.Heller 贺远强侯超侯贤胡红波胡铨胡森胡世聪呼晓军黄代绘黄文昊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜泽军金敏康明铭柯通 D.Kuleshov 李兵兵李澄李骢李飞李海波李会财李华阳李军李剑李捷李凯李文龙李秀荣李昕李新李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘佳松刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农龙文杰鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣 A.Masood 闵振 W.Mitthumsiri 南云程区子维庞彬宇 P.Pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.Sáiz 邵澄宇邵琅 O.Shchegolev 盛祥东石京燕宋慧超 Yu.V.Stenkin V.Stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐泽波田文武王博东王超王辉王洪光王建成王界双王利苹王玲玉王冉王润娜王为王祥高王祥玉王阳王玉东王岩谨王亚平王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁新薛良闫大海颜景志杨朝文杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮曾宗康查敏翟徐徐张彬彬张丰张海明张恒英张建立张丽霞张力张路张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张月雷张毅张勇赵兵赵静赵雷赵立志赵世平郑福郑应周斌周浩周佳能周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center of Sciences Beijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANfU Cosmic Ray Research Center ChengduSichuanChina Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China Hefei 230026China School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031China College of Physics Sichuan UniversityChengdu 610065China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Key Laboratory of Dark Matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Hebei Normal University Shijiazhuang 050024China School of Physics and Astronomy(Zhuhai)&School of Physics(Guangzhou)&Sino-french Institute of Nuclear Engineering and Technology(Zhuhai) Sun Yat-sen University519000 Zhuhai&510275 GuangzhouGuangdongChina Dipartimento di fisica dell’Universitàdi Napoli"federico II" Complesso Universitario di Monte Sant’Angelovia Cinthia80126 NapoliItaly School of Physics and Astronomy Yunnan UniversityKunming 650091China D´epartement de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China Depar

The Large High Altitude Air Shower Observatory(LHAASO)has three sub-arrays,KM2A,WCDA,and *** flux variations of cosmic ray air showers were studied by analyzing the KM2A data during a thunderstorm on June 10,*** number of shower events that meet the trigger conditions increases significantly in atmospheric electric fields,with a maximum fractional increase of 20%.The variations in trigger rates(increases or decreases)were found to be strongly dependent on the primary zenith *** flux of secondary particles increased significantly,following a trend similar to that of shower *** better understand the observed behavior,Monte carlo simulations were performed with CORSIKA and G4KM2A(a code based on GEANT4).We found that the experimental data(in saturated negative fields)were in good agreement with the simulations,assuming the presence of a uniform electric field of-700 V/cm with a thickness of 1500 m in the atmosphere above the observation *** to the acceleration/deceleration by the atmospheric electric field,the number of secondary particles with energy above the detector threshold was modified,resulting in the changes in shower detection rate.

关键词： thunderstorm cosmic rays extensive air showers LHAASO-KM2A

西藏羊八井广延空气簇射阵列性能的Monte carlo研究

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高能物理与核物理 1993年第5期17卷 385-390页

作者： M.Amenomori 白占武曹臻丁林垲冯振勇 K.Hibino N.Hotta 黄庆霍安祥贾焕玉江光佐焦善庆 f.Kajino K.Kasahara 拉巴次仁梅东明孟烈孟宪茹米玛次仁 K.Mizitani 木钧 H.Nanjo M.Nishizawa 努桑 M.Ohnishi I.Ohta 任敬儒 To.Saito M.Sakata 施志政 M.Shibata T.Shirai 孙欣新 H.Sugimoto 台安 K.Taira 谭有恒 N.Tateyama S.Torii 王辉王家祥温诚忠 Y.Yamamoto 余光泽袁澎 T.Yuda 曾家刚赵春华张春生张慧敏张力张鸣扎桑扎西次仁周文德日本弘前大学中国西南交通大学物理系成都610031 中国科学院高能物理研究所北京100039 日本东京大学宇宙线研究所日本宇都宫大学日本甲南大学日本神奈川大学中国西藏大学数理系拉萨851501 日本琦玉大学中国云南大学物理系昆明650091 日本横滨国立大学日本相模工业大学

本文用Monte carlo方法研究西藏羊八井空气簇射阵列性能。确定好事例判选标准.簇射中心定位精度达3.4m.原初粒子到达方向角分辨率好于1.1°.原初粒子能量按lgE_0=lg(0.45∑N_i)±0.226确定,其中E_0(TeV)为初级入射粒子能量,∑N_i为fT探... 详细信息

本文用Monte carlo方法研究西藏羊八井空气簇射阵列性能。确定好事例判选标准.簇射中心定位精度达3.4m.原初粒子到达方向角分辨率好于1.1°.原初粒子能量按lgE_0=lg(0.45∑N_i)±0.226确定,其中E_0(TeV)为初级入射粒子能量,∑N_i为fT探测器上探测到的粒子总数.

关键词：广延空气簇射蒙特卡罗法空气簇射

每核子14.6和60GeV能量下氧离子诱发核反应的带电粒子谱

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高能物理与核物理 1989年第10期13卷 865-869页

作者： M.I.Adamovich M.M.A■■arwal R.Arora Y.A.Alexandrov S.A.Azimov S.K.Badyal E.Basova K.B.Bhalla A.Bhasin V.S.Badyal R.A.Bomadarenko T.H.Burnett 蔡(冒力) L.P.Chernova M.M.Chernyavski B.Dressel E.M.friedlander S.I.Gerassimov E.R.Ganssau■e S.Garpman S.G.Gerassimov A.Gill J.Grote K.G.Gulamov V.G.Gulyamov V.K.Gupta S.Hackel H.H.Heckman B.Jakobsson B.Judek S.Katroo f.G.Kadyrov H.Kallies L.Karlsson G.L.Kaul M.Kaur S.P.Kharlamov J.Kohli V.Kumar P.Lal V.G.Larinova P.J.Lindstrom 刘连寿 S.Lokanathan J.Lord N.S.Lukicheva L.K.Man■otra N.V.Maslennikova I.S.Mitta E.Monnand S.Moolerjee C.Mueller S.H.Nasyrov V.S.Nvtny G.I.Orlova I.Otterlund N.G.Peresadko S.Persson N.V.Petrov 钱琬燕 R.Raniwala S.Raniwana N.K.Rao J.Y.Rhee N.Shaidkhanov N.G.Salmanova W.Schulz f.Schussler V.S.Shukla D.Skeldin■ K.Soderstrom E.Stanlund R.S.Storey 孙君芬 L.N.Svechnilova M.I.Tretyakova T.P.Trofimova 王海桥翁智群 R.J.Wilkes 许国发张东海郑蒲英周代翠周景晨列比切夫研究所旁加贝大学物理技术研究所查漠大学拉加斯坦大学核物印研究所华盛顿大学华中师范大学菲利浦斯大学劳伦斯-伯克利实验室隆德大学国家研究委员会原子能研究中心 )列比切夫研究所山西师范大学高能物理研究所

本文给出了每核子14.6和60GeV能量下氧离子诱发核反应的带电粒子多重数分布和赝快度分布.实验数据取自EMU-01乳胶叠,并与Lund Monte carlo模型(fRITIOf)作了比较.

关键词：氧离子诱发核反应带电粒子谱

每核子100MeV以下核—核碰撞中集体流的分量的研究

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每核子100MeV以下核—核碰撞中集体流的分量的研究