Kurie Plot Y-Axis: Counts, Energy & Time

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Discussion Overview

The discussion centers on how to compute the y-axis values for a Kurie plot using data from Sr-90 measurements, specifically focusing on the relationship between counts, energy, and time. Participants explore the necessary calculations and the meaning of various terms related to the plot.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant seeks guidance on calculating the y-axis values for a Kurie plot from counts and energy, questioning the relevance of momentum in this context.
  • Another participant asserts that the y-axis is simply the square root of the frequency, implying a direct relationship between energy and momentum.
  • A follow-up question seeks clarification on whether "frequency" refers to the rate of returns from the detector, specifically counts per minute.
  • One participant notes that many online examples of Kurie plots have labeled axes, prompting a request for clarification on why the initial participant's understanding may not align with these examples.
  • A later reply expresses uncertainty about the functions involved in the formula $$\sqrt \frac{N(E)}{pEF(Z, E)S(E)}$$, specifically the meanings of ##N(E)##, ##F(Z,E)##, and ##S(E)##, and requests assistance in understanding these terms.

Areas of Agreement / Disagreement

Participants express differing views on the interpretation of the y-axis values and the relevance of momentum, indicating that multiple competing views remain without a clear consensus.

Contextual Notes

Participants mention specific functions and terms related to the Kurie plot formula, but there is uncertainty regarding their definitions and how they apply to the calculations being discussed.

HYaq
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I am trying to make a Kurie plot for Sr-90 data collected. I have my data in counts per energy value, and I know the length of time that the measurement was taken for. How do I compute the y-axis values to produce a Kurie plot? Most of what I have read involves momentum; is there a way to get it from energy and counts?
Thanks
 
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The y-axis is just the square root of the frequency. Energy and momentum have a direct relation, but the x-axis is energy anyway.
 
mfb said:
The y-axis is just the square root of the frequency. Energy and momentum have a direct relation, but the x-axis is energy anyway.
By frequency, you mean the rate of returns from the detector? i.e. counts/min?
 
I just Googled "Kurie plot" . 7 of the first 10 plots had their axes labeled. This obviously isn't working for you - can you explain why not?
 
Vanadium 50 said:
I just Googled "Kurie plot" . 7 of the first 10 plots had their axes labeled. This obviously isn't working for you - can you explain why not?
Thanks. Yes, they have them labelled with $$\sqrt \frac{N(E)}{pEF(Z, E)S(E)}$$

I am not sure what ##N(E)##, ##F(Z,E)##, and ##S(E)## refer to as they are functions. I tried searching for them, and I couldn't determine what the functions are. The closest I found was something that mentioned ##F(Z,E)## is often looked up in some table.

Some help with what the terms under the root sign would be greatly appreciated.
 

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