Linear amplifier question, Coarse Gain/Fine Gain.

Click For Summary
SUMMARY

The discussion centers on calibrating a linear amplifier for spectroscopy, specifically using a scintillator with Cs-137 and Co-60 sources. The user calibrated the Cs-137 spectrum at a coarse gain of x16 and fine gain of x5, resulting in a photo peak at channel 935 for 662 Kev. For the Co-60 spectrum, the coarse gain was adjusted to x8 and fine gain to x3.5. The user seeks clarification on how to factor in the fine gain adjustment when recalibrating the channel for Co-60, indicating that the relationship between coarse and fine gain is not standardized and requires consulting equipment manuals for precise adjustments.

PREREQUISITES
  • Understanding of linear amplifier gain settings
  • Knowledge of gamma spectroscopy and photo peak calibration
  • Familiarity with scintillator detectors
  • Ability to interpret equipment manuals for calibration procedures
NEXT STEPS
  • Research the impact of fine gain adjustments on photo peak calibration
  • Study the specifications and manuals of the scintillator and linear amplifier used
  • Learn about the calibration process for different gamma sources
  • Explore advanced techniques in spectroscopy data analysis
USEFUL FOR

Researchers and technicians in spectroscopy, particularly those working with gamma radiation sources and linear amplifiers, will benefit from this discussion. It is especially relevant for those calibrating equipment for accurate spectral analysis.

Tito_Tileto
Messages
4
Reaction score
0
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?
 
Engineering news on Phys.org
You are going to have to resort to the manuals for the equipment you are using. There is no "standard" answer.
 

Similar threads

Graduate Gamma spectroscopy- Fine Gain Coarse Gain factors
  • · Replies 5 ·
Replies
5
Views
5K
Troubleshooting Op Amp Attenuation in Gain-Adjustable Amplifier Circuit
  • · Replies 14 ·
Replies
14
Views
2K
Graduate Does an increase in gain cause peaks to shift right?
  • · Replies 1 ·
Replies
1
Views
1K
Finding Resolution for PIPS Detector Using Am-241 Source
  • · Replies 1 ·
Replies
1
Views
2K
What is the appropriate gain for the MCA amplifier in this scenario?
  • · Replies 1 ·
Replies
1
Views
4K