@InProceedings{GramsBrKaEcMu:2009:PrStSt,
               author = "Grams, Guilherme and {Nelson Jorge Schuch} and Braga, Carlos 
                         Roberto and Kane, Rajaram Purushottam and Echer, Ezequiel and 
                         Munakata, Kazuoki",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Preliminary statistical study of the directional intensity of 
                         cosmic ray muons observed at the brazilian southern space 
                         observatory",
                 year = "2009",
         organization = "60th International Astronautical Congress - IAU",
             abstract = "Cosmic rays are high-energy particles with source in the 
                         interstellar space. When these impinge the top of the atmosphere, 
                         interact with atmospheric constituents, producing secondary 
                         particles. Among them are the muons that have a huge penetration 
                         capacity and maintain the incident direction of the primary cosmic 
                         rays. A multi-directional telescope (MDT) for detection of 
                         high-energy galactic cosmic rays (GCRs) - muons was installed in 
                         2001 and upgraded in 2005, through an international cooperation 
                         between Brazil, Japan and USA, and operated since then at the 
                         Southern Space Observatory - SSO/CRS/INPE - MCT, (29,4ºS, 53,8ºW, 
                         480m), Sao Martinho da Serra, RS, in the South of Brazil. This 
                         telescope is a component detector of the Global Muon Detector 
                         Network (GMDN), which has been developed in an international 
                         collaboration lead by Shinshu University, Japan. The main 
                         objective of this work is to study the directional intensity of 
                         muons, which are produced by primary cosmic rays with energy 
                         between 50 GeV and 170 GeV and observed at the Earths surface. We 
                         analyze the data collected by the muon detector telescope MDT at 
                         the SSO in 2006 and 2007. The Telescope consists of two layers of 
                         4x7 detectors with a total observation area of 28 square meters. 
                         The counting of muons in each directional channel is made by a 
                         coincidence of pair of pulses, one from a detector in the upper 
                         layer and the other from a detector in the lower layer. The SSOs 
                         MDT equipped with 119 directional channels for muon count rate 
                         measurement is capable of detecting muons incident with the zenith 
                         angle between 0º and 75,53º. A statistical analysis was made with 
                         the MDT muon count rate for all the directional channels. The 
                         average and the standard deviation of the muon count rate in each 
                         directional component are calculated to deduce the zenith angle 
                         dependence of the rate. Preliminary results have shown lower 
                         (higher) count rate with larger (smaller) zenith angle, as 
                         expected from the production and propagation of muons in the 
                         atmosphere.",
  conference-location = "Rio de Janeiro, RS",
      conference-year = "August, 13-14",
             language = "en",
           targetfile = "Abstract IAU-2009_Guilherme_Grams.pdf",
        urlaccessdate = "13 maio 2024"
}