超高能γ-强子族的能量集中现象  

Phenomenon of Energy Concentration in Super-High Energy γ-Hadron Families

作　　者：戴志强[1] 薛良[2] 李金玉[2] 张学尧[2] 冯存峰[2] 傅宇[2] 李婕[2] 曹培园[2] 张乃健[2] 何瑁[2] 王承瑞[2] 任敬儒[3] 陆穗苓[3] 

机构地区：[1]山东大学电子工程系,济南250100 [2]山东大学物理系,济南250100 [3]中国科学院高能物理研究所,北京100039

出　　处：《高能物理与核物理》2000年第10期885-891,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金!( 1 98750 3 1 );高等学校博士学科点专项科研基金资助&&

摘　　要：通过对甘巴拉山铁乳胶室观测到的族事例以及COSMOS程序和CORSI KA程序产生的模拟族事例进行分析、对比 ,对超高能γ 强子族的能量集中现象的产生特征进行了细致的研究 .初步的结论是 :超高能γ 强子族的能量集中现象是族中含有的高能中心簇射集团的外在表现 ,这种现象在实验上发生的频度为 (2 0 5± 3 1 ) % ,集团的平均横向扩展约为 0 3 7cm .与传统的以唯象多团模型为基础的COSMOS程序相比 ,基于SIBYLL模型的CORSIKA程序的模拟结果较为接近实验的分析结果 .The family events observed with iron emulsion chambers at Mt. Kanbala are analyzed and compared with the simulations by the COSMOS code and CORSIKA code respectively. A detailed study on the production of super high energy γ hadron families with energy concentration behavior is carried out. The preliminary conclusions are: 1) the energy concentration behavior of super high energy γ hadron families is the external embodiment of high energy central shower clusters contained in the families. 2) the mean lateral spread of these clusters is about 0.37cm. 3) the frequency of this phenomenon appeared under the conditions of R ≤10mm and χ 10 ≥90% is (20.5±3.1)%. 4) compared to the COSMOS code based on the phenomenological multicluster model,the simulation by the CORSIKA code that adopts SIBYLL model is closer to the analytical results of experiment.

关 键 词：铁乳胶室 γ-强子族 能量集中现象 

分 类 号：O572[理学—粒子物理与原子核物理]