Model NAIS-3x5x16 Sodium Iodide Scintillation Detector is a high-efficiency scintillation detector featuring a 3x5x16 in. NaI(Tl) crystal in a stainless steel housing, including a photomultiplier tube, an internal magnetic/light shield, a high-voltage power supply (HVPS), stabilization electronics, and preamplifier. NaI(Tl) detectors have a proven record of long term reliability but have peak-shifting issues in changing temperatures.
The NAIS-3x5x16 NaI(Tl) detector is LED temperature-stabilized*, eliminating these peak-shift problems caused by fluctuations in ambient temperature. This makes the NAIS-3x5x16 detector suitable for use in non-air-conditioned rooms as well as in field applications. The in-built LED temperature stabilization continuously monitors and adjusts the gain of the detector automatically to ensure consistent performance throughout the entire temperature range. This allows users to perform nuclide identification under all conditions and environments (both indoor and outdoor), while maintaining the highest confidence in the results obtained by the instrument.
The housing is of stainless steel construction. The NAIS-3x5x16 gain stabilizer is optimized for digital signal processor shaping of 1 µs rise time and 1 µs flat top, which is the default setting of the Osprey digital tube base MCA.