硕士论文-LPM效应的实验验证及乳胶室中强子与g的区分
文献类型：学位论文
| 作者 | 范晓聆 |
| 学位类别 | 硕士 |
| 答辩日期 | 1988 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 北京 |
| 导师 | 任敬儒 ; 任敬儒 |
| 关键词 | LPM效应 乳胶室 强子 |
| 学位专业 | 宇宙线高能物理 |
| 中文摘要 | At superhigh energy the cross sections for bremsstrahlung and pair creation are suppressed in dense media. This density effect is called the Landau--Pomeranchuk--Migdal effect (LPM effect). It is due to multiple Coulomb scattering by neighboring atoms. K.Kasahara put Monte-Carlo calculation to LPM effect in the Pb emulsion chamber, and published his results in 1984, the behavior of cascade showers, especially the width of the transition curve [full width at half maximum (FWHM)] in the 100--Tev region observed in Pb emulsion chambers, is compared with results of Monte-Carlo calculation in his paper. In this paper, we measured the superhigh energy single spots in Fe emulsion chambers obtained by the group of China--Japan EC Collabration on Mt. Kanbala, carried on the experimental examination to the LPM effect and also to the simulation results of K.Kasahara. At present, the standard distinguishing hardons and gammarays in emulsion chambers is Δ t c = 6.0 c.u.. The defect of this standard is that many hardons (about 69 percent of the total hardons) are misjudged as gamma-rays. In this paper, we made a rty to use the ΔLc = 2 σ standard and Δt c = 6.0 c.u. standard simultaneously to distingulsh hardons and gamma-rays in emulsion chambers. |
| 学科主题 | 宇宙线高能物理 |
| 语种 | 中文 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/209928]  |
| 专题 | 粒子天体物理中心_学位论文和出站报告 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 范晓聆. 硕士论文-LPM效应的实验验证及乳胶室中强子与g的区分[D]. 北京. 中国科学院研究生院. 1988. |
入库方式： OAI收割
来源：高能物理研究所
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