x-ray emission
21ray gun — noun (in science fiction) a gun causing injury or damage by the emission of rays …
22emission — /əˈmɪʃən/ (say uh mishuhn), /i / (say ee ) noun 1. the act of emitting. 2. that which is emitted; a discharge; an emanation. 3. such a discharge, especially of pollutants such as greenhouse gases, into the environment. 4. the act of issuing. 5.… …
23X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …
24Gamma ray burst — [ GRB 990123 taken on January 23, 1999. The burst is seen as a bright dot denoted by a square on the left, with an enlarged cutout on the right. The object above it with the finger like filaments is the originating galaxy. This galaxy seems to be …
25X-ray photoelectron spectrometry — Spectrométrie de fluorescence X Pour les articles homonymes, voir SFX, FX et XRF. Un spectromètre de fluorescence X Philips PW1606 avec manutention automatiq …
26X-ray fluorescence — (XRF) is the emission of characteristic secondary (or fluorescent) X rays from a material that has been excited by bombarding with high energy X rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis,… …
27x-ray — /eks ray /, n. Also, x ray, X ray. 1. Physics. a. Often, x rays. a form of electromagnetic radiation, similar to light but of shorter wavelength and capable of penetrating solids and of ionizing gases. b. such radiation having wavelengths in the… …
28X-ray spectroscopy — is a gathering name for several spectroscopic techniques for determining the electronic structure of materials by using x ray excitation. X ray emission spectroscopy Karl Manne Georg Siegbahn from Uppsala, Sweden (Nobel Prize 1924), who… …
29Chandra X-ray Observatory — and Inertial Upper Stage sit inside the payload bay on Space Shuttle Columbia mission STS 93 General information …
30X-ray — [ 22 December 1895 and presented to Professor Ludwig Zehnder of the Physik Institut, University of Freiburg, on 1 January 1896. The dark oval on the third finger is a shadow produced by her ring. [cite book last = Kevles first =Bettyann Holtzmann …
