M-Series PROFILE GEM Detectors

The M-Series detectors are designed for use with Marinelli beakers to provide an optimum solution and efficiency. M-Series detectors provide the same resolution and better absolute efficiency (below 50 keV) than GEM series detectors, and better resolution but lower absolute efficiency (below 50 keV) than GMX series detectors. These are made where the endcap diameter is “filled with the crystal” and the length is slightly longer than the diameter. The overall absolute efficiency for a Marinelli beaker is maximized. This is the most common beaker where the well diameter is equal to its length. Additionally, M-Series for a given relative (IEEE) efficiency, represents the optimum “use” of germanium material, generating the maximum absolute counting efficiency for on-endcap or “close geometry” extended samples with a higher energy range requirement than F-, S-, or SP-Series, such as:

• Point sources on-endcap
• Filter paper samples on-endcap
• Samples presented in bottles and pots on-endcap
• Waste drum monitoring