翻訳と辞書 Words near each other ・ Formate-nitrite transporter ・ Formateur ・ Formate–tetrahydrofolate ligase ・ Formate—dihydrofolate ligase ・ FormatFactory ・ Formation ・ Formation (American football) ・ Formation (association football) ・ Formation (Catholic) ・ Formation (group theory) ・ Formation 8 ・ Formation and evolution of the Solar System ・ Formation Armed F ・ Formation dance ・ Formation evaluation ・ Formation evaluation gamma ray ・ Formation evaluation neutron porosity ・ Formation finish ・ Formation fluid ・ Formation flying ・ Formation matrix ・ Formation of rocks ・ Formation of the Eastern Bloc ・ Formation patch ・ Formation reconnaissance regiment ・ Formation rule ・ Formation skydiving ・ Formation Z ・ Formations of the Hellenic Army ・ Formations of the Soviet Army Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Formation evaluation gamma ray ： ウィキペディア英語版 Formation evaluation gamma ray The formation evaluation gamma ray log is a record of the variation with depth of the natural radioactivity of earth materials in a wellbore. Measurement of natural emission of gamma rays in oil and gas wells are useful because shales and sandstones typically have different gamma ray levels. Shales and clays are responsible for most natural radioactivity, so gamma ray log often is a good indicator of such rocks. In addition, the log is also used for correlation between wells, for depth correlation between open and cased holes, and for depth correlation between logging runs. ==Physics== Natural radioactivity is the spontaneous decay of the atoms of certain isotopes into other isotopes. If the resultant isotope is not stable, it undergoes further decay until a stable isotope forms. The decay process is usually accompanied by emissions of alpha, beta, and gamma radiation. Natural gamma ray radiation is one form of spontaneous radiation emitted by unstable nuclei. Gamma (γ) radiation may be considered either as an electromagnetic wave similar to visible light or X-rays, or as a particle of photon. Gamma rays are electromagnetic radiations emitted from an atomic nucleus during radioactive decay, with the wavelength in the range of 10−9 to 10−11cm 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Formation evaluation gamma ray」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.