With our Compton Camera, thanks to it’s high spatial resolution and good signal/noise ratio, it is possible to image heavily shielded sources.

In this case we are observing a high activity (1GBq) ¹³⁷Cs source used for level gauging.

The source is shielded by 20 cm of lead.

1. In 10 minutes using the 80 photons on a total 20.000 selected on the ¹³⁷Cs peak (662 +/- 30 keV), it is possible to locate the source correctly through shielding.
2. Then on the same acquisition, using the diffused photons, it is possible to image the hole in the shielding used for level gauging when the source is active.