Lesson 17. Detectors. Introduction. When radiation interacts with matter, result is the production of energetic electrons. (Neutrons lead to secondary processes that involve charged species)
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
35 eV/ion pair>105 ion pairs created.
Collect this charge using a capacitor, V=Q/C
NO AMPLIFICATION OF THE PRIMARY IONIZATION
typical gas: P10,
Sensitive to ,, X-rays, charged particles
Fast response, dead time ~ s
Create a region around the p-n junction
where there is no excess of either n or p
carriers. This region is called the “depletion
Note that absorption and re-emission have different spectra
Emission of light by activator center
Most general distribution describing radioactive decay
is called the Binomial Distribution
n=# trials, p is probability of success
P(x) = (xm)x exp(-xm)/x!
xm = pn
For Poisson distribution
Counts occur in “bunches”!!