Gamma spectroscopy regarding Cs-137

  • Context: Graduate 
  • Thread starter Thread starter abotiz
  • Start date Start date
  • Tags Tags
    Gamma Spectroscopy
Click For Summary

Discussion Overview

The discussion revolves around gamma spectroscopy measurements involving a Cs-137 source, specifically addressing the identification of various peaks in the spectrum, including a peak around 80 keV. Participants explore the nature of this peak and its relation to other observed features in the spectrum.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant reports observing a sum peak in their measurements of a strong Cs-137 source and expresses confusion about the peak at approximately 80 keV.
  • The same participant identifies other peaks in the spectrum, including a backscatter peak, Compton edge, and total absorption peak, but is uncertain about the origin of the 80 keV peak.
  • Another participant inquires whether the Cs-137 source is contained in a lead pig, suggesting a potential influence on the observed peaks.
  • The original poster later realizes that the 80 keV peak corresponds to X-rays from the lead (K-shell), specifically noting it as 88 keV.
  • A subsequent reply acknowledges the original poster's realization, indicating a supportive interaction.

Areas of Agreement / Disagreement

Participants appear to agree on the identification of the 80 keV peak as related to lead X-rays, but the initial confusion and the process of reaching this conclusion indicate a progression rather than a consensus from the outset.

Contextual Notes

The discussion does not address potential limitations in the measurements or assumptions regarding the detection setup and the nature of the source.

Who May Find This Useful

Individuals interested in gamma spectroscopy, particularly those working with Cs-137 sources or similar detection setups, may find this discussion relevant.

abotiz
Messages
72
Reaction score
0
Hi,

I was doing a measurement on a Cs-137 source, strong enough so that my detector registers a sum peak.

I can't get my head around A, the peak at ~80 keV.. I get B (backscatter peak), C(compton edge) and D total abs.peak.

I tried with a weaker Cs-137 and I saw the 35keV (Ba) but no ~80keV.

Any ideas?

Thank you very much!
 

Attachments

  • Cs-137.jpg
    Cs-137.jpg
    20.6 KB · Views: 571
Physics news on Phys.org
Is your more intense Cs source contained in a lead pig?
 
Yes it is.

What are you suggesting my friend?
 
Wow... I Feel real stupid now.
Its the X-ray from lead (K-shell) that is 88keV.

Thank you very much!
 
I knew you could figure it out with a hint!
 

Similar threads

  • · Replies 21 ·
Replies
21
Views
5K
  • · Replies 5 ·
Replies
5
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 2 ·
Replies
2
Views
8K
  • · Replies 2 ·
Replies
2
Views
9K
Replies
3
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K