PRODUCT SPECIFICATIONS:
GAMMA SCINTILLATION DETECTOR, Nal(TI)

WE ARE SEEKING SOURCES TO PROVIDE THREE DIFFERENT SIZE CRYSTALS AS DESCRIBED BELOW:

2" x 4" x 16" CRYSTAL
Detector description: 2" x 4" x 16" Nal(TI) integral line. No voids in crystal
Photo-multiplier: 3.5" phototube with mu-metal shield, 14-pin 2" phenolic base, low background, and alignment tab set on centerline of 4" side
Overall Maximum Dimensions: D2.65" x W4.4" x L24"

2" x 4" x 4 CRYSTAL
Detector description: 2" x 4" x 4" Nal(TI) integral line. No voids in crystal
Photo-multiplier: 2" phototube with mu-metal shield, 14-pin 2" phenolic base, low background, and alignment tab set on centerline of 4" side
Overall Maximum Dimensions: D2.65" x W4.4" x L11"

1" x 1" dia. CRYSTAL
Detector description: 1" x 1" diameter Nal(TI) integral line. No voids in crystal
Photo-multiplier: 2" phototube with mu-metal shield, 14-pin 2" phenolic base, low background
Overall Maximum Dimensions: D2.65" x W4.4" x L7"

COMMON SPECIFICATIONS:

High-Voltage Bias on PMT: shall be positive
Photomultiplier tube (PMT) to detector housing: may be separable or sealed
Detector ID (p/n & s/n) Label: shall be located on same side of tube as alignment tab on phenolic base
Crystal housing: aluminum (minimum .032") or stainless steel; 95% efficient at 60 KeV. Aluminum is preferred.
Maximum Shock: 5 G's
Operating Temperature Range: -30 to +60 degrees C
Output signal (Gain): Using 137Cs: 5 milli-volts minimum and 50 milli-volts maximum into a 50 ohm load with 1000 VDC and 10 Meg-Ohm voltage divider
Resolution: 8.0% FWHM or better at 662 KeV (137Cs)
Note: Resolution shall be determined with 137Cs source centered on largest side face and with an accumulation of a minimum of 400k peak (ROI) counts.

INTERESTED SUPPLIERS ARE TO SUBMIT SPECIFICATION DOCUMENTS FOR THEIR LIKE OR SIMILAR PRODUCT TO THE POINT OF CONTACT LISTED IN THIS SOURCES SOUGHT NOTIFICATION IN ORDER TO BE CONSIDERED FOR THE REQUEST FOR QUOTATION.