Fano factor

Fano factor

Signal Generation in Semiconductor Detectors for Photon-Counting CT

Published in Katsuyuki Taguchi, Ira Blevis, Krzysztof Iniewski, Spectral, Photon Counting Computed Tomography, 2020

Xiaochun Lai, Liang Cai, Kevin Zimmerman, Richard Thompson

where the variance of the distribution, , illustrates the sub-Poisson behaviors of the process. For CdTe or CZT, the Fano factor F is around 0.12 [5]. The mean, is equal to , where ζ is the energy needed for generating an electron-hole pair. For CZT, it is 4.64 eV. Ee is the photon energy, here we assume the detector absorb all the photon energy. For a 122-keV photon, there are around 26,300 electron-pairs produced by the photoelectric effect.

Geospatial correlation between COVID-19 health misinformation and poisoning with household cleaners in the Greater Boston Area

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Journal Information

Published in Clinical Toxicology, 2021

Michael A. Chary, Daniel L. Overbeek, Alexandria Papadimoulis, Adina Sheroff, Michele M. Burns

We considered the number of calls and tweets each day each to be generated by a Poisson process. This assumption appears valid for all years because the coefficients of dispersion for the distribution of daily calls were within 1.1–1.2 for all years. The coefficient of dispersion, also called the index of dispersion or Fano factor, is the ratio of the variance of a distribution to its mean. A necessary but not sufficient condition for data to follow a Poisson distribution is that the data have a coefficient of dispersion of 1 [12].

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Signal Generation in Semiconductor Detectors for Photon-Counting CT

Geospatial correlation between COVID-19 health misinformation and poisoning with household cleaners in the Greater Boston Area