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Short-time decay INDEX

The Ce -activated cathode-ray phosphors are used in applications where a very short decay time is a requirement [13). Since the emi.ssion is a completely allowed transition (5t/-> 4/, Sect. 3.3.3Ji), the decay time of Ce varies between about 15 and 70 ns, depending on the emission wavelength. One application is in the beam-index tubes which generate color images by means of one electron gun [1,13]. This system could, however, never compete with the above-mentioned shadow-mask tube. The beam-index phosphor indicates the location of the electron beam. Therefore, the emission should have a very short decay time and, in order not to disturbe the image, should be situated in the ultraviolet. A good choice is Y2Si2C>7 rCe with a radiant... [Pg.143]

See other pages where Short-time decay INDEX is mentioned: [Pg.174]    [Pg.11]    [Pg.118]    [Pg.310]    [Pg.200]    [Pg.20]    [Pg.258]    [Pg.147]    [Pg.77]    [Pg.150]    [Pg.395]    [Pg.270]    [Pg.211]   
See also in sourсe #XX -- [ Pg.307 ]



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