| Co-Investigator(Kenkyū-buntansha) |
アナトーリ パンフィーロ ロシア科学アカデミー原子核研究所, 助教授
レオニード デデンコ モスクワ大学, 物理学部, 教授
エフゲーニ ブガーエフ ロシア科学アカデミー原子核研究所, 教授
バヤルト ルプサンドロジ ロシア科学アカデミー原子核研究所, 助教授
ペーター ポカレフ イルクールク大学, 応用物理研究所, 助教授
レオニード ベズルコフ ロシア科学アカデミー原子核研究所, 副所長
アナトーリ パブロフ イルクールク大学, 物理学部, 助教授
ニコライ ブッドネフ イルクーツク大学, 応用物理研究所, 助教授
ヴァヂム ナウーモフ イルクールク大学, 物理学部, 助教授
YURI Parfenov Applied Physics Institute, Iruktsk State University, Irkutsk, Russia, 応用物理研究所, 教授
MITSUI Kiyomi Department of Management, Yamanashi Gakuin University, Yamanashi, Japan, 経営情報学部, 助教授 (80013340)
HUJII Masami Department of Information Science, Aomori University, Aomori, Japan, 工学部, 教授 (20013691)
MIYAJI Takashi Institute for Nuclear Study, University of Tokyo, Tanashi, Japan, 原子核研究所, 助手 (20013401)
KAWAGUCHI Setsuo Department of Physics, Hirosaki University, Hirosaki, Japan, 教養部, 教授 (30013395)
MINORIKAWA Yukio Department of Mathematics and Physics, Kinki University, Higashi-Osaka, Japan, 理工学部, 教授 (90088500)
KOHNO Tsuyoshi The Institute of Physics and Chemistry, Wako, Japan, 副主任研究員 (60211231)
TAKAHASHI Nobusuke Department of Physics, Hirosaki University, Hirosaki, Japan, 教養部, 助教授 (40216742)
KIKUCHI Ryusaburo Graduate School of Science, Kyoto University, Kyoto, Japan, 理学研究科, 助手 (10025356)
INOUE Naoya Department of Physics, Saitama University, Urawa, Japan, 理学部, 助教授 (40168456)
DEDENKO Leonid Department of Physics, Moscow State University, Moscow, Russia
PANFILOV Anatory Institute for Nuclear Reseach, Russian Academy of Science, Moscow, Russia
PAVLOV Anatory Applied Physics Institute, Irkutsk State University, Irkutsk, Russia
NAUMOV Vadim Department of Physics, Irkutsk State University, Irkutsk, Russia
BUDNEV Nikolai Applied Physics Institute, Irkutsk State University, Irkutsk, Russia
BEZRUKOV Lenid Institute for Nuclear Research, Russian Academy of Science, Moscow, Russia
BUGAEV Efgeni Institute for Nuclear Reseach, Russian Academy of Science, Moscow, Russia
LOUBSANDORJIEV Bayarto Institute for Nuclear Reseach, Russian Academy of Science, Moscow, Russia
POKOLEV Peter Applied Physics Institute, Irkutsk State University, Irkutsk, Russia
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| Research Abstract |
The Main puropose of our project is to develope the fudamental techniques by which we could realize the extremely high energy neutrino astrophysics in the lake Baikal. In our opinion, the ultimate aim of the extremely high energy neutrino astrophysics is to understand the Universe which could be elucidated by neutrino only. On the other hand, the aim of the high energy neutrino astrophysics whose enery is lower than that of extremely high energy neutrino astrophysics is to understand the Universe by neurtino, reffering to the image of the Universe enlighted by high energy gamma-ray. As you know well, there are four projects on the high energy neutrino astrophysics in the world. Namely, DUMAND (Hawaii), NT-200 (the Baikal), AMANDA (south pole) and NESTOR(the Me diterranean). Among them, only [NT-200] has succeeded in the reconstructions of high energy muon tracks which are absolutely important for thedetection of the high energy cosmic muon-neutrino.
There are serious problems to be over
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come in both experiments and the calculations in high energy neutrino astrophysics still now. One of them is the energy determination of muon-neutrino. In this problem, the fluctuation play an important role. We have calculated the relation between the muon energy and the Cherenkov light produced, taking into account the fluctuation effect rigorously.
Also, we have examined the behavior of hig energy muon in water, taking into account the fluctuation correctly and have found that the catastrophic energy loss due to the bremsstrahlung play the decisively important role for the energy determination of the muon. As for the high energy gamma-ray astrophysics, we have examined the performances of Russian made photomultiplier which is expected to be improved for the high energy gamma-rsay experiment linked with NT-200.
Some techniques have been developed in this project for the extremely high energy neutrino astrophysics. The cross sections for the extremely high energy muon to cause the bremsstrahlung and direct electron pair production have been obtained. The cross section is expected to be utilized the energy determination of the muon in extremaly high energies. Less
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