…Because the intensity of cosmic rays is weak deep underground, the rare phenomenon of neutrino interactions is also observed. The intensity of primary cosmic rays is almost isotropic, but observation instruments fixed on Earth show small variations of about 0.5% due to the rotation of the Earth, which is called the diurnal variation. The diurnal variation is due to the anisotropy of cosmic rays, which occurs when the flow of cosmic rays is disturbed by the magnetic field in the flow of plasma from the Sun called the solar wind. … *Some of the terminology that refers to the "intensity of cosmic rays" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…地下深部では宇宙線強度も弱いので,希少現象の中性微子相互作用の観測もなされている。 一次宇宙線の強度はほぼ等方的であるが,地球上に固定された観測器は地球の回転によって0.5%程度の小変動を示し,これを日変化と呼んでいる。日変化は,太陽風と呼ばれる太陽からのプラズマの流れの中の磁場で,宇宙線の流れが乱されるために起こる宇宙線の非等方性に基づくものである。… ※「宇宙線の強度」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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