Research topic:photon

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Photon Mass Attenuation Coefficient for photons in energy range from 1 keV to 20 MeV for Elements Z = 1 to 100. (Image by Jarekt, GFDL)

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Image Photon Counting System

A Dictionary of Astronomy | 1997 | © A Dictionary of Astronomy 1997, originally published by Oxford University Press 1997. (Hide copyright information) Copyright

Image Photon Counting System (IPCS) An electronic system for recording faint images, using a four‐stage image tube. It has since been rendered obsolete by CCD systems.

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