SOME STORIES OF BRASIL-JAPAN COLLABORATION AND CHACALTAYA MOUNTAIN

S.L.C. BARROSO; P.C. BEGGIO; L.F. GOMEZ G.; E.J.T. MANGANOTE; A. MARIANO; M.J. MENON; E.H. SHIBUYA

doi:10.1051/epjconf/201920810001

All issues

Volume 208 (2019)

EPJ Web Conf., 208 (2019) 10001

Abstract

Open Access

Issue		EPJ Web Conf. Volume 208, 2019 ISVHECRI 2018 - XX International Symposium on Very High Energy Cosmic Ray Interactions


Article Number		10001
Number of page(s)		7
Section		Homage to Oscar Saavedra
DOI		https://doi.org/10.1051/epjconf/201920810001
Published online		10 May 2019

EPJ Web of Conferences 208, 10001 (2019)
https://doi.org/10.1051/epjconf/201920810001

SOME STORIES OF BRASIL-JAPAN COLLABORATION AND CHACALTAYA MOUNTAIN

S.L.C. BARROSO¹^*, P.C. BEGGIO²^**, L.F. GOMEZ G.³^***, E.J.T. MANGANOTE⁴^****, A. MARIANO³^†, M.J. MENON³^‡ and E.H. SHIBUYA³^§

¹ Departamento de Ciências Exatas e Tecnológicas, Universidade Estadual do Sudoeste da Bahia, 45083-900, Vitória da Conquista, BA, Brasil.
² Laboratório de Ciências Matemáticas, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ, Brasil.
³ Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-970 Campinas, SP, Brasil.
⁴ Faculdades de Campinas, FACAMP, 13083-898 Campinas, SP, Brasil.

^* e-mail: serlc@gmail.com ^** e-mail: beggio@uenf.br ^*** e-mail: lfgomez@gmail.com ^**** e-mail: ejtmanganote@gmail.com ^† e-mail: andersom.mariano@gmail.com ^‡ e-mail: marciojmenon@gmail.com ^§ e-mail: ehiros@hotmail.com

Published online: 10 May 2019

Abstract

An international cooperation, named Brasil-Japan Collaboration of Chacaltaya Emulsion Chamber Experiment (B-J Collaboration) exposed 2.35 × 10⁸ m².s, during the period 15^thJun, 1962 till 10^thMay, 1988. It corresponds to 22 'runs' on Cosmic Rays and in this figure are not included photosensitive material set in the lower part of the two-storied emulsion chamber. Although 3 more 'runs' occurred after 1988, they were not included either, because they were not yet properly measured and because they contain mixed Japanese and Russian films. Chacaltaya Mountain was firstly used in 1947 for 2 meson observations and π - μ decays. It was a wise choice not only for these observations but also for the B-J Collaboration and for the Alpaca Project, running at neighbouring sites. The main results observed by the B-J Collaboration are presented.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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