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STATE OF ART INSTRUMENTATION FROM AN INNOVATIVE COMPANY

ACCESSORIES FOR GAMMA RAY SPECTROMETER system

 
Technical Data

(a) SCINTILLATION DETECTORS

Nucleonix Systems offers wide range of NaI Scintillation Detectors of different sizes both with flat & well type crystals, to meet the requirements of wide range of users for Gamma ray spectrometry measurements.
Scintillation detectors offered include 1"x1", 2"x2" & 3"x3" NaI integral assemblies with built-in pre-amplifiers. These detector assemblies give excellent stability, superior performance & good resolution in the range of 8.0 to 9.5% for Cs-137. Scintillation detectors of other sizes can be offered against user specific requirements also.

 

Important Specifications Detector Type
Flat/Well type NaI crystal
SD 151 SD152F SD152W SD153F SD153W
Crystal Sizes
1” x 1” 2” x 2” 2” x 2” 3” x 3” 3” x 3”
a. Flat crystal
Flat Flat Well Flat Well

Not applicable

Not applicable

0.75 dia X 1.43 deep Not applicable 0.656 dia X 2.063 deep
8.5 % 8.5 % 9 % 8.5 % 9 %
b. Well Size (applicable for well type detectors only)
Resulation (Better than)
Photo multiplier
R6095 of Hamamatsu or its equivalent EMI 9857 or 9266 or its equivalent EMI 9305 or its equivalent
Pre-amplifier
Built - in Built - in Built - in
Gain (Approx.)
25 25 25
Noise (RMS. referred to input)
Less than 50 µV Less tha 50µV Less than 50 µV
Operating Voltage
600 to 900 V 700 to 900V 750 to 900V
Out put
Positive Tail Pulse Positive Tail Pulse Positive Tail Pulse
Output impedance
90 Ohms 90 Ohms 90 Ohms
Power Requirement (Typical)
-12V @ 12 mA -12V @ 12mA -12 V @ 12mA
(b) GAMMA REFERENCE STANDARD SET TYPE GS 290

Gamma Reference Standard Set Type: GS290 consists of a set of FIVE Gamma sources evaporated & sealed on 25mm dia x 5mm plastic disc covering SIX photopeak energies in the range of 3 to 5 micro curie. A reference chart for this is given below. The accuracy of these sources is in the range of +/-10%. All these dics sources are enclosed in a box made of acrylic sheet and supplied.

Note : BRIT is not able to supply this Mn-54 at present. In view of this we are able to give only 5 sources in the Gamma Reference set.

Gamma Isotope
Energy MeV
Nominal Activity Half life
Co-57
0.123
2-5 µCi 273 Days
Ba-133
0.36 (Main)
2-5 µCi 7.5 years
Na-22
0.511; 1.280
2-5 µCi 2.6 Years
Cs-137
0.662
2-5 µCi 30 Years
Co-60
1.17; 1.33
2-5 µCi 5.3 Years
Mn-54
0.835
2-5 µCi 312 days

LEAD SHIELDING FOR SCINTILLATION DETECTOR [ T ype : LS 250]
This consists of 40mm thick lead shielding cylindrical rings assembled according to the detector. There is a provision in the bottom ring through which system connections are given to the detector, which is placed inside the lead shield.