Gamma spectroscopy- Fine Gain Coarse Gain factors

by Tito_Tileto
Tags: cesium-137, cobalt-60, gamma, instrumentation, radioactive decay
Tito_Tileto is offline
Feb5-14, 05:26 PM
P: 3
I'm currently doing a spectroscopy lab where you use a scintillator and Cs-137 to obtain a Cs-137 spectrum. I calibrated this spectrum using the known gamma energy for Cs-137 at 662 Kev at the photo peak. I am now trying to use this calibration for a Co-60 spectrum. The problem is that when I obtained my Cs-137 Spectrum I had the coarse gain at x16 and fine gain at x5. When I was taking data for the Co-60 I had to adjust the coarse gain to x8 and fine gain to x3.5. I understand the coarse gain is half that of the Cs-137 but how would I factor in the fine gain? For example for Cs-137 the photo peak was on channel 935 at 662Kev. So if I adjust the gain by half then 662Kev should correspond to channel 467.5 for the Co-60 spectrum. How does the fine gain adjust the factor?
Phys.Org News Partner Physics news on
Physicists consider implications of recent revelations about the universe's first light
Vacuum ultraviolet lamp of the future created in Japan
Grasp of SQUIDs dynamics facilitates eavesdropping

Register to reply

Related Discussions
Antenna Gain - Gain Comaprison(Transfer) Method Engineering, Comp Sci, & Technology Homework 0
gain bandwidth product of unity gain opamp Electrical Engineering 10
Confusion in Power gain and voltage gain in decibels... Electrical Engineering 2
coarse and fine grained entropy? Classical Physics 1
What is the difference between DC Gain and Gain Constant? Electrical Engineering 0