翻訳と辞書 Words near each other ・ Neuvillette-en-Charnie ・ Neuvilley ・ Neuvilly ・ Neuvilly-en-Argonne ・ Neuvireuil ・ Neuvizy ・ Neutron depth profiling ・ Neutron detection ・ Neutron diffraction ・ Neutron economy ・ Neutron electric dipole moment ・ Neutron emission ・ Neutron flux ・ Neutron generator ・ Neutron howitzer ・ Neutron imaging ・ Neutron interferometer ・ Neutron magnetic moment ・ Neutron Man ・ Neutron microscope ・ Neutron moderator ・ Neutron moisture gauge ・ Neutron monitor ・ Neutron number ・ Neutron poison ・ Neutron probe ・ Neutron radiation ・ Neutron reflectometry ・ Neutron reflector ・ Neutron research facility 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 Neutron imaging ： ウィキペディア英語版 Neutron imaging Neutron imaging is the process of making an image with neutrons. The resulting image is based on the neutron attenuation properties of the imaged object. The resulting images have much in common with industrial X-ray images, but since the image is based on neutron attenuating properties instead of X-ray attenuation properties, some things easily visible with neutron imaging may be very challenging or impossible to see with X-ray imaging techniques (and vice versa). X-rays are attenuated based on a material's density. Denser materials will stop more X-rays. With neutrons, a material's likelihood of attenuation of neutrons is not related to its density. Some light materials such as boron will absorb neutrons while hydrogen will generally scatter neutrons, and many commonly used metals allow most neutrons to pass through them. This can make neutron imaging better suited in many instances than X-ray imaging; for example, looking at O-ring position and integrity inside of metal components, such as the segments joints of a Solid Rocket Booster. == History == The neutron was discovered by James Chadwick in 1932. The first demonstration of neutron radiography was made by Hartmut Kallmann and E. Kuhn in the late nineteen thirties; they discovered that upon bombardment with neutrons, some materials emitted radiation that could expose film. The discovery remained a curiosity until 1946 when low quality radiographs were made by Peters. The first neutron radiographs of reasonable quality were made by J. Thewlis (UK) in 1955. Around 1960, Harold Berger (US) and John Barton (UK) began evaluating neutrons for investigating irradiated reactor fuel. Subsequently, a number of research facilities were developed. The first commercial facilities came on-line in the late sixties, mostly in the USA and France, and eventually in many other countries including Canada, Japan, South Africa, Germany, and Switzerland. 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「Neutron imaging」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.