宇宙线高能粒子与液体闪烁体的核相互作用

利用放置在海拔3185米处的多板云室,以液体闪烁体作靶,研究宇宙线高能粒子产生的核相互作用。本文分析了18个由荷电粒子引起的核作用事例,用Castagnoli公式求得初能平均值E₀=(41±8)Bev,荷电粒子平均多重性n_s=4.9±0.3,以x=lgγ_ctgθ_l为变量作次级粒子的角分布,发现dN/dx分布可能存在着两个峯,文中试用二心模型对此角分布进行了讨论。关键词：

NUCLEAR INTERACTIONS OF COSMIC RAY HIGH ENERGY PARTICLES WITH LIQUID SCINTILLATOR

Nuclear interactions induced by cosmic ray high energy particles have been studied by means of a multiplate cloud chamber at 3185 meters above sea level with liquid scintillator as target material. From the analysis of 18 interactions induced by charged primaries it is found: (i) average primary energy E₀=41±8Bev (by Castagnoli formula), (ii) average multiplicity of charged secondaries n_s=4.9±0.3, (iii) with x=lgγ_ctgθ_l the differential angular distribution dN/dx indicates some possibility of theexistence of double-humped shape. This angular distribution has been discussed tentatively along the lines of two-centered model.