Pulse height and transient response of semiconductor radiation detectors to fission fragments.
pulseheighttrans00krul.pdf (7.499Mb)Abstract
The pulse height response of silicon surface barrier
detectors was measured as a function of energy for median
light and heavy fission fragments of Cf ^ over an energy range
of 100 > E > 7MeV. The results demonstrated that the calibration
procedure proposed by Schmltt, e_t al for undegraded
fission fragments is actually valid over an energy range of
100 > E > 25 MeV. Comparison of the pulse height response
to fission fragments with the response to alpha particles
yielded the pulse height defect as a function of energy.
The magnitude and shape of the curve were found to be in
disagreement with a calculation by Haines and Whitehead based on the unified range theory of Lindhard and co-workers.
The transient response of silicon surface barrier
detectors was measured as a function of the energy of
incident Cf2^2 fission fragments. The effect of the plasma
formed by the incident fission fragment on the collection
time was determined. The time to disperse the plasma was
found to be proportional to E '
m
where 2 S m < 3 and E
is the incident particle energy. A simple model was
proposed for the plasma effect and found to give agreement
with experiment.
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