Linear amplifier question, Coarse Gain/Fine Gain.


by Tito_Tileto
Tags: amplifer, amplifier, coarse, factor, gain, gamma, instrumentation, linear
Tito_Tileto
Tito_Tileto is offline
#1
Feb8-14, 06:06 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 Engineering news on Phys.org
Lifting the brakes on fuel efficiency
PsiKick's batteryless sensors poised for coming 'Internet of things'
Researcher launches successful tech start-up to help the blind
meBigGuy
meBigGuy is offline
#2
Feb8-14, 09:56 PM
P: 963
You are going to have to resort to the manuals for the equipment you are using. There is no "standard" answer.


Register to reply

Related Discussions
Gamma spectroscopy- Fine Gain Coarse Gain factors General Physics 0
amplifier's gain Engineering, Comp Sci, & Technology Homework 2
amplifier gain Engineering, Comp Sci, & Technology Homework 5
gain amplifier of a MCA Advanced Physics Homework 1
gain of MCA amplifier Engineering, Comp Sci, & Technology Homework 0