منابع مشابه
The 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 کاملThe Mapping X - Ray Fluorescence Spectrometer ( Mapx
Thomas Bristow, Robert Downs, Marc Gailhanou, Franck Marchis, Douglas Ming, Richard Morris, Vicente Armando Solé, Kathleen Thompson, Philippe Walter, Michael Wilson, Albert Yen and Samuel Webb, NASA Ames Research Center, Moffett Field, CA [email protected], SETI Institute, Mountain View, CA, Univ. of Arizona, Tucson AZ, IM2NP, Université Paul Cézanne, Marseille, France, NASA Johnson Space Ce...
متن کاملITER Core Imaging X - Ray Spectrometer
During Phase 2 of our study of the CIXS conceptual design we have tackled additional important issues that are unique to the ITER environment. These include the thermal control of the crystal and detector enclosures located in an environment with a 100°–250° C ambient temperature, tritium containment, and the range of crystal and detector movement based on the need for spectral adjustments and ...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1916
ISSN: 0031-899X
DOI: 10.1103/physrev.7.334