Birenbaum L, Scarl D B
Appl Opt. 1973 Mar 1;12(3):519-21. doi: 10.1364/AO.12.000519.
An RCA C31000F (8853) photomultiplier with a cathode quantum efficiency of 5.5% (for 633-nm light) was found to have a single photon counting efficiency of only 3.3%. The difference is shown to be due to small pulses well below the single electron peak in the output pulse height spectrum. These pulses are usually below the discriminator threshold level and are not counted. The reason for the small pulses is not understood.
发现一个阴极量子效率为5.5%（对于633纳米光）的RCA C31000F（8853）光电倍增管，其单光子计数效率仅为3.3%。结果表明，这种差异是由于输出脉冲高度谱中远低于单电子峰的小脉冲所致。这些脉冲通常低于鉴别器阈值水平，因此未被计数。小脉冲产生的原因尚不清楚。
