A unit of radioactivity. Symbol Bq. When the rate of nuclear decay (or spontaneous nuclear fission) is 1 per second, the radioactivity is 1 Bq. Radioactivity is the time rate at which an atomic nucleus decays by emitting beta or alpha rays, or undergoes spontaneous nuclear fission. The unit of radioactivity has long been the curie (symbol Ci), but the becquerel was established as the unit of radioactivity at the 1975 General Conference on Weights and Measures. 1 Ci is equal to 3.7 x 1010 Bq. It is named after A. H. Becquerel, a French physicist and Nobel Prize-winning discoverer of radioactivity. It is a unit with a different definition and properties from the gray, which represents the strength of the absorbed dose of radiation, or the sievert (symbol [Sv]), which is a unit obtained by multiplying the gray by a coefficient that takes into account the effects of different types of radiation on the human body. → Related topics Curie (unit) | Designated waste | Radioactivity Becquerel→ Related topics Curie | Curie Source : Heibonsha Encyclopedia About MyPedia Information |
放射能の単位。記号Bq。原子核の崩壊(または自然核分裂)の割合が毎秒1であるときの放射能が1Bqである。放射能とは,原子核がβ線とかα線などを放出して崩壊したり,自然核分裂を起こしたりすることの時間的な割合である。放射能の単位として,以前からキュリー(記号Ci)が用いられているが,1975年の国際度量衡総会で放射能の単位としてベクレルが制定された。1Ciは3.7×1010Bqに等しい。フランスの物理学者でノーベル賞受賞の放射能の発見者A.H.ベクレルにちなんで名づけられた。放射線の吸収線量の強さを表すグレイやグレイに放射線の種類の違いによる人体などへの影響を加味して係数を掛け合わせた単位であるシーベルト(単位記号[Sv])とは,定義・性質の異なる単位である。 →関連項目キュリー(単位)|指定廃棄物|放射能 ベクレル→関連項目キュリー|キュリー 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 |
>>: Heguri no Matori - Heguri no Matori
Born: July 12, 1790 in Finkenwerder, near Hamburg ...
A domain located in Matsuura, Hizen Province (Kar...
〘noun〙 When a document has a certifying statement ...
...The time difference with Japan is 6 hours. [Ci...
A perennial grass of the family Poaceae (illustrat...
〘Noun〙① The name of an office established in China...
...Later, these inn-based settlements were called...
Teatro Olimpico is a 16th century theater in Vicen...
...The latter reaches a leaf length of 2.5 m and ...
...A town in Uda County, central eastern Nara Pre...
A sacred mountain in Minami-Uonuma City, Niigata ...
This refers to wild plants of the rice genus Oryza...
...General term for birds of the Polyplectron gen...
…Even when the solid is a metal, the same situati...
It is a custom to go to the sea or mountains to pl...