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Interpretation of Inelastic Hadron-Nucleus Collisions

Description: In the interaction of high energy ({approx}> 100 GeV) hadron with a nucleus, there are several interesting points which are not fully explained by the existing models. Firstly, the cross section does not obey the simple A{sup 2/3}-rule. Increase of multiplicities with A is rather slower than expect3ed. Some models are proposed to explain this point. Angular distributions are also to be explained. Here they propose two models which seem to explain various experimental results fairly well. The cross section does not depend on the type of intranuclear interactions.
Date: January 1, 1975
Creator: Fukushima, H.; Fujioka, G. & U., /Kobe
Partner: UNT Libraries Government Documents Department

On the determination of loop nature in the TEM

Description: The two direct methods available for determining the nature of small clusters, were studied. Experiments in heavy-ion irradiated Ag and Cu, including comparisons with Black-White contrast analysis (B-W), forced us to conclude that use of the 2-1/2D technique for analysis of faulted loops is impossible because of reciprocal-lattice spike and other effects. We used B-W analysis to study the clusters produced by RT heavy-ion irradiation of Cu. In-situ irradiations were performed in Argonne HVEM-Tandem Facility using 40 and 80 keV Kr{sup +} ions. Nearly all the analysable first-layer loops were vacancy in nature. Some deeper cluster were also certainly vacancy. There is no unequivocal evidence for interstitial loops under these conditions. The near impossibility of establishing that interstitial loops are not present, is shown by the fact that a large fraction of loops (over 50%) could not be analyzed either because they did not display clear B-W contrast under any condition or sufficiently consistent B-W contrast under several different operating conditions.
Date: January 1, 1997
Creator: Jenkins, M.L.; Fukushima, H. & Kirk, M.A.
Partner: UNT Libraries Government Documents Department

Inelastic Cross Sections for Proton - Nucleus Collisions at 205-GeV/c in Nuclear Emulsion

Description: A stack of the nuclear emulsion was exposed to the 205 GeV/c proton beam at NAL. By along-the-track scanning of 1060 m, 2963 inelastic proton-nucleus collisions are obtained. The cross section for the inelastic interaction, its mass number dependence and the cross section for the coherent production are studied.
Date: January 1, 1975
Creator: Konishi, S.; Kusumoto, O.; Okabe, H.; Ozaki, S.; Teranaka, M.; U., /Osaka City et al.
Partner: UNT Libraries Government Documents Department

NUCLEAR INTERACTIONS OF HIGH ENERGY PROTONS IN NUCLEAR EMULSION

Description: Inelastic nuclear interactions in nuclear emulsions exposed to 200, 300 and 400 GeV proton beams are investigated. Dependence of inelastic cross sections on A is discussed. It seems to have been generally accepted that N{sub h}-distribution has little dependence on incident energies, but it is shown that the fraction of events without heavily ionizing tracks (N{sub h}=0) increases appreciably with increasing primary energies. Classifying events by number of heavily ionizing particles, the pseudo-rapidity distributions are studied, and the number of shower particles at higher rapidity region is less in central collisions with heavy nuclei compared to that in collisions with small N{sub h}.
Date: January 1, 1977
Creator: Fujioka, G.; Fukushima, H.; Hayashino, T.; Homma, Y.; Horiguchi, T.; Igarashi, M. et al.
Partner: UNT Libraries Government Documents Department