Gamma Reference Standard Set Type: GS290 consists of a set of FIVE/SIX Gamma sources evaporated and sealed on 25mm dia x 5mm plastic disc covering ranging from 100KeV upto 1.33MeV energies with activity in the range of 2 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 neatly polished wooden box .
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
Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone:+91-40-32918055, 32914548 Fax : 040 - 27262146
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