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phototube

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.01 sec.
phototube [′fōd·ō‚tüb]
(electronics)
An electron tube containing a photocathode from which electrons are emitted when it is exposed to light or other electromagnetic radiation. Also known as electric eye; light-sensitive tube; photoelectric tube.
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[FIGURE 4 OMITTED] The analysis program calculates the individual phototube efficiencies, thereby allowing for correction due to asymmetry in the counting; rates in each of the detection efficiency due to detection of the 511 KeV annihilation photons was taken into account by using the positron spectrum calculated by the program SPEBETA (21) as input for the Monte Carlo simulation package PENELOPE (22) using the techniques described in (23).
Standardization of [.sup.68] Ge/[.sup.68] Ga using three liquid ... by Zimmerman, B.E.; Cessna, J.T.; Fitzgerald, R. / Journal of Research of the National Institute of Standards and Technology
6x phototube, multiplied by the ocular magnifications of 1, 5, and 10x to obtain a total magnification of 0.
Age-validation of a leopard shark (Triakis semifasciata) recaptured ... by Smith, Susan E.; Mitchell, Robert A.; Fuller, Dan / Fishery Bulletin
Each cone, part of an experiment called CYGNUS, contains a plastic sheet that scintillates when a particle strikes it; a phototube at the top of each cone senses the faint burst of light.
Catching some rays: Earth-based detectors hunt for violent stellar ... by Cowen, Ron / Science News
 
 
 
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