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PMT
Photomultiplier Tube. A low-noise vacuum device requiring high voltages to accelerate electrons and producing very high gains. Can detect individual photons. One detected photon on the photo-cathode can produce a very short pulse containing millions of photoelectrons. PMTs usually operate between the blue and red regions of the visible spectrum, with greater quantum efficiency in the blue-green region, depending upon photo-cathode materials. Maximum quantum efficiencies are about 25%.
PhotoMultiplier Tube
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Science Dictionary INDEX:List of Terms: Terms beginning with "A", Page 1 |
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A: Page 1 of 22. |
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