The phenomenon in which light is emitted when a charged particle travels through a transparent medium at a speed greater than the phase velocity of light in that medium (the speed of light in a vacuum divided by the refractive index of that medium). This light is called Cherenkov radiation or Cherenkov light. The blue light seen near the fuel rods of a nuclear reactor underwater is an example of this radiation. It was discovered by Cherenkov. It is similar to a shock wave in the air, and is emitted in a cone direction that forms an angle θ measured from the direction of the particle's movement (θ is given by cos θ = v/v', where v is the speed of light in the medium and v' is the particle speed). Cherenkov counters that use this radiation are devices that detect Cherenkov radiation using a photomultiplier tube and at the same time determine the energy of the particle from the angle of travel of the radiation. →Super-Kamiokande → Related topics Tam | Frank Source : Heibonsha Encyclopedia About MyPedia Information |
荷電粒子が透明な媒質中を,その媒質内の光の位相速度(真空中の光速度をその媒質の屈折率で割ったもの)より大きい速度で走るとき,光を発生する現象。この光をチェレンコフ放射またはチェレンコフ光という。水中にある原子炉燃料棒付近に見られる青い光はこの放射の例である。チェレンコフが発見。空気中の衝撃波に似たもので,粒子の進行方向から測って,角度θをなす円錐方向に放出される(θはcos θ=v/v′であたえられる。ただし,vは媒質内の光速度,v′は粒子速度)。この放射を利用したチェレンコフ計数管は光電子増倍管によってチェレンコフ放射を検出し,同時に放射の進行角度から粒子のエネルギーを知る装置。→スーパーカミオカンデ →関連項目タム|フランク 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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>>: Cherenkov (English notation) Павел Алексеевич Черенков/Pavel Alekseevich Cherenkov
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