Browsing by Autor "T. Matano"
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Item type: Item , Análisis de la radiación gamma de UAE en el hemisferio sur(1995) R. Ticona; I. Poma; K. Honda; I. Tsushima; N Kawazumi; K. Hashimoto; T. MatanoItem type: Item , Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya(American Physical Society, 1996) N. Kawasumi; I. Tsushima; K. Honda; K. Hashimoto; T. Matano; N. Inoue; K. Mori; A. Ohsawa; M. Tamada; N. OhmoriSimultaneous observations of families and accompanied air showers with emulsion chambers and the air shower array of electronic equipment at Mt. Chacaltaya (5200 m, 540 g/${\mathrm{cm}}^{2}$) reveal that families bear the data of nuclear interactions generated deep in the atmosphere. 47 outstanding families with \ensuremath{\Sigma}${\mathit{E}}_{\ensuremath{\gamma}}$\ensuremath{\ge}10 TeV are correlated with the accompanied air showers of the size ${10}^{5}$--${10}^{8}$. A scatter plot of the average family energy versus the size of the relative air shower requires further energy fractionizing process(es) in the propagation of high energy cosmic rays in the atmosphere, such as a larger dissipative mechanism in nuclear interaction, heavier chemical composition of the primary cosmic rays, etc. We reach the conclusion that nuclear interaction changes its features in the energy region ${\mathit{E}}_{0}$\ensuremath{\gtrsim}${10}^{16}$ eV, because the heavier composition, proposed so far, is not sufficient for the required dissipative process. A comparison with the data from the HADRON experiment at a similar altitude with a similar technique shows that no larger deviations are present between both experiments. \textcopyright{} 1996 The American Physical Society.Item type: Item , Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya I(Elsevier BV, 1997) K. Honda; N. Kawasumi; I. Tsushima; K. Hashimoto; T. Nishida; T. Matano; N. Inoue; A. Ohsawa; M. Tamada; N. OhmoriItem type: Item , Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya II(Elsevier BV, 1997) C. Aguirre; K. Hashimoto; K. Honda; N. Inoue; N. Kawasumi; N. Martinic; T. Matano; N. Ohmori; A. Ohsawa; F. OscoItem type: Item , Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya. II. Study of the hadronic component in air showers(American Physical Society, 2000) C. Aguirre; Hiroshi Aoki; K. Hashimoto; K. Honda; N. Inoue; N. Kawasumi; Yoshikazu Maeda; N. Martinić; T. Matano; N. OhmoriAn experimental setup of an air shower array, hadron calorimeter, and emulsion chamber is being carried out at Mt. Chacaltaya (5200 m, Bolivia), in order to study the hadron interaction and the primary cosmic rays in the energy region exceeding ${10}^{15}$ eV. The number of hadrons in the air shower, detected by the hadron calorimeter, is discussed mainly in this paper. A comparison with the simulation shows that the number of hadrons in the air shower is not compatible with that of the simulation, indicating that the Feynman scaling law is violated more strongly than the one assumed in the simulation at ${10}^{16}$ eV. The average mass number of the primary cosmic rays, estimated from the distribution of the number of hadrons, is $〈\mathrm{ln}A〉=2.8\ifmmode\pm\else\textpm\fi{}0.5$ at ${10}^{16}$ eV.Item type: Item , Simultaneous observation of families and associated air showers at Mt. Chacaltaya(Springer Nature, 1996) N. Kawasumi; I. Tsushima; K. Honda; K. Hashimoto; T. Matano; N. Inoue; K. Mori; K. Yokoi; A. Ohsawa; M. TamadaItem type: Item , Size distributions of air showers accompanied with high energy gamma ray bundles observed at Mt. Chacaltaya(NASA Headquarters, 1985) T. Matano; M. Machida; I. Tsuchima; N. Kawasumi; K. Honda; K. Hashimoto; N. Martinić; Juan Camilo Gómez Zapata; C. E. Navia; C. AquirreSize distributions of air showers accompanied with bundle of high energy gamma rays and/or large size bursts under emulsion chambers, to study the composition of primary cosmic rays and also characteristics of high energy nuclear interaction. Air showers initiated by particles with a large cross section of interaction may develop from narrow region of the atmosphere near the top. Starting levels of air showers by particles with smaller cross section fluctuate in wider region of the atmosphere. Air showers of extremely small size accompanied with bundle of gamma rays may be ones initiated by protons at lower level after penetrating deep atmosphere without interaction. It is determined that the relative size distribution according to the total energy of bundle of gamma rays and the total burst size observed under 15 cm lead absorber.Item type: Item , Study of primary cosmic ray composition from gamma ray families in air shower cores(Elsevier BV, 1997) K. Honda; N. Kawasumi; I. Tsushima; K. Hashimoto; T. Nishida; T. Matano; N. Inoue; A. Ohsawa; M. Tamada; N. OhmoriItem type: Item , VHE gamma-rays with energies above 1014 eV observed at Mt.Chacaltaya(Elsevier BV, 1990) N. Inoue; T. Matano; K. Mori; K. Hashimoto; K. Honda; N. Kawasumi; I. Tsushima; Z. Aliaga; N. Martinić; A. ReguerínItem type: Item , What can we study through families and accompanied air showers?(Elsevier BV, 1999) T. Matano; T. Nishida; N. Kawasumi; I. Tsushima; K. Hashimoto; K. Honda; N. Inoue; K. Mori; A. Ohsawa; K. Yokoi