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xenon(Xe)  (zeĀ“non)   a chemical element, atomic number 54, atomic weight 131.30. The radioactive isotope 133Xe is used in assessment of pulmonary function, lung imaging, and cerebral blood flow studies.
 

xenon-133  a radioisotope of xenon having a half-life of 5.3 days and a principal gamma ray photon energy of 81 keV; used for pulmonary ventilation imaging. Symbol 133Xe.





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