The absolute efficiency is the ratio of the measured
count rate within the peak to the gamma ray emission rate of the source.
- eabs
=
|
Number of pulses recorded |
 |
|
Number of radiation quanta emitted by source |
dependent on detector properties and details of counting geometry.
Therefore:
- Efficiency =
|
Peak
area |
|
|
|
Live time ´
emission probability ´
source activity |
|
