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Radioactive nuclear decay detection

CS8384 8 ch , 14 bit Digitizer
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Radioactive nuclear decay detection

The customer has a requirement for PC-based waveform digitizer cards to digitize shaped pulses derived from nucleardecay
detectors. These pulses vary in their rate (frequency of occurrence) and amplitude. Their shape is approximately
Gaussian with a full-width at half the maximum amplitude (FWHM) of 3 to 5 microseconds.
The characterization of each pulse is critical for the accurate and precise determination of the activity of radioactive
materials. These materials have very low count-rates (0.02 pulses per minute) to relatively high count-rates (>1,000
pulses per minute).
Important to the measurement process are the speed and reliability of the waveform digitizer cards. The customer
wants to digitize pulses continuously with minimal probability of missing a decay event. The re-displaying of digitized
pulses during the data acquisition is an important capability and
needs to be done in a near real-time fashion.
They need 4 cards, each able to simultaneously digitize two
input-voltage signals at a minimum of 50 million samples
per second, with a voltage-resolution of at least 1 part in
4096. This means that they need at least 12 bits of vertical resolution.
The number of points per record is up to 4096 points, with each
channel needing a minimum of 256 kiloSamples of acquisition
memory.
It is hard to predict what fundamental research will lead to, but past
experience has brought about the wealth of modern technologies
we now enjoy… Radioactivity, while an accidental discovery, is
now a well-known phenomenon, but one that must be monitored

The customer uses PC-based digitizer cards to digitize shaped pulses derived from nucleardecay detectors. The speed and reliability of
the digitizers are important to the measurement process. The customer has decided that they will need four cards with at least 12 bit resolution,
sampling rate of at least 50 million samples per second and minimum acquisition memory of 256 k words.
Gage’s CompuScope 8384 is recommended for this project. The CompuScope 8384 can sample analog signals at speeds up to 50 MS/s with 14
bit resolution and up to 2 GigaSample on-board acquisition memory

 application note Radioactive nuclear decay detection   pdf file download