| 摘要 |
A screening system (102) for scanning a target for radioactive isotopes comprises a gamma-ray spectrometer comprising at least one scintillation body (201) for generating photons in response to incident gamma-rays, at least one photodetector (203) coupled to the respective scintillation body for detecting the photons and generating output signals therefrom, and a processing unit (106) for receiving the output signals from the photodetector(s). The screening system further comprises a drive mechanism (103) coupled to the gamma-ray spectrometer which is arranged to move the spectrometer relative to the target to perform a scan. The drive mechanism may be an electrically powered vehicle (e.g. fork-lift truck). The processing unit calculates energy loss spectra for incident gamma-rays at intervals along the target to identify radioactive isotopes present in the target from individual or combined spectra. Thus, a full spectroscopic analysis can be obtained for the target. |
