منابع مشابه
Atmospheric Electron-induced X-ray Spectrometer (aexs) Instrument
Introduction: The progress in the development of the AEXS is described. The AEXS is a surface analysis tool based on excitation of characteristic x-ray fluorescence (XRF) spectra from samples in ambient atmospheres using a focused electron beam. Operation in ambient atmospheres with moderate-tohigh spatial resolution in comparison to similar instruments is obtained through the use of a thin ele...
متن کاملThe NEAR X-Ray/Gamma-Ray Spectrometer
he X-Ray/Gamma-Ray Spectrometer on the Near Earth Asteroid Rendezvous (NEAR) spacecraft will remotely sense X-ray and gamma-ray emissions from the surface of near-Earth asteroid 433 Eros and look for characteristic “signatures” in those emissions to determine its elemental composition. During the planned 10 months of orbits about Eros beginning in early 1999, data returned from the instrument w...
متن کاملX-ray Absorption Spectroscopy Using X–ray Fluorescence Spectrometer
Strong characteristic Kα X-ray lines are accompanied by weak lines due to the radiative Auger effect (RAE) [1, 2]. The characteristic Kα fluorescent X-rays (K-L2,3 lines) are emitted by the 2p→1s electric dipole transition after one of the 1s electron photoionization, Though the probability is less than 0.01, one of the 2p electrons is excited into an unoccupied discrete or continuum level simu...
متن کاملArcus: the x-ray grating spectrometer explorer
R. K. Smith, M. H. Abraham, R. Allured, M. Bautz, J. Bookbinder, J. N. Bregman, L. Brenneman, N. S. Brickhouse, D. N. Burrows, V. Burwitz, R. Carvalho, P. N. Cheimets, E. Costantini, S. Dawson, C. DeRoo, A. Falcone, A. R. Foster, C. E. Grant, R. K. Heilmann, E. Hertz, B. Hine, D. Huenemoerder, J. S. Kaastra, K. K. Madsen, R. L. McEntaffer, E. D. Miller, J. Miller, E. Morse, R. Mushotzky, K. Nan...
متن کاملA study of Electron-Multiplying CCDs for use on the International X-ray Observatory Off-Plane X-ray Grating Spectrometer
CCDs are regularly used as imaging and spectroscopic devices on space telescopes at X-ray energies due to their high quantum efficiency and linearity across the energy range. The International X-ray Observatory’s X-ray Grating Spectrometer will also look to make use of these devices across the energy band of 0.3 keV to 1 keV. At these energies, when photon counting, the charge generated in the ...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 1994
ISSN: 0168-9002
DOI: 10.1016/0168-9002(94)91936-4