This ISOCS (In Situ Object Counting System) Shield (Figure 1) has been designed as the optimum in convenience and functionality for in situ gamma spectroscopy with a germanium detector.
The system is supplied with both 25 mm and 50 mm lead shielding which gives the user the ability to utilize the sensitivity and low background capabilities of a laboratory grade germanium spectrometer directly on site, regardless of where that site is located.
Unshielded, the detector has a nearly 360° field of view, and can be used for 4π counting of the walls/floors/contents of an entire room. The field of view can be reduced (Figure 2) by adding the shield and collimators to provide fields of view of 30°, 90°, and nearly 180° by simply sliding the appropriate shield components on the mounting rails. In addition, a completely shielded sample chamber can be assembled by combining the components from the two systems.
Its standard wheeled mounting frame makes it easy to move the shield to the assay site, and the individual rear wheel brakes keep it at the desired location.
The mounting frame features both an upper (for 1 meter detector/ground counting) and lower (normal) detector mounting location. The detector can be rotated 180° from down to up, and stopped at any position, not just a few fixed positions, for maximum positioning flexibility. The detector holder even includes a laser pointer to aid in aiming the detector at remote objects.
Whatever the sample and wherever it's located, the ISOCS Shield System has the versatility and flexibility to count it.