Is it correct to calculate the number of particles

In summary, the conversation discusses using the F8 tally in MCNP to calculate the number of particles recorded by a detector. The method involves adding data related to the full energy peak of the energy spectrum and multiplying it by the number of particles emitted. The example given involves a Co-60 source with two different energies, and the normalization factor depends on the radionuclides. The process can also be applied to calculate both low and high energy counts by multiplying the areas of different peaks by 200 with different percentages of low and high energy particles.
  • #1
Ericdjs
5
2
I want to calculate that how many particles will be recorded by detector with MCNP.
using the F8 tally which would provide energy spectrum, add all of data that related with full energy peak of spectrum, multiply by number of nps, then obtain the number of particles.
is it correct ? i am not sure about this.
 
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  • #2
Hi,
With this method you will calculate the number of count in your detector for one particle. After you must multiply by the number of particles emited.
For example if you have 100 Bq of Co 60 multiply F8 by 200 and you will have counts/s
 
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  • #3
Thank you ! 100 Bq of Co-60 source multiply F8 by 200 because the Co-60 source has two different energies ? what if i need to calculate both low energy and high energy counts, is it correct that multiply the areas of different peaks by 200 with different percentages of both low energy particles and high energy particles?
 
Last edited:
  • #4
200 because 2 photons with 100 % in intensity
The normalisization factor depends of the radionuclides
 
  • #5
PSRB191921 said:
200 because 2 photons with 100 % in intensity
The normalisization factor depends of the radionuclides
Thank you !
PSRB191921 said:
200 because 2 photons with 100 % in intensity
The normalisization factor depends of the radionuclides
thank you !
 

1. Is it necessary to calculate the number of particles in a scientific experiment?

Yes, calculating the number of particles is essential in many scientific experiments as it helps in determining the accuracy and precision of the results obtained.

2. What is the purpose of calculating the number of particles?

The main purpose of calculating the number of particles is to accurately determine the amount of a substance or element present in a given sample, which can then be used to make predictions or draw conclusions in a scientific study.

3. How do scientists calculate the number of particles?

The number of particles can be calculated using various mathematical equations, depending on the type of particles being studied. For example, the number of atoms in a substance can be calculated using Avogadro's number, while the number of molecules can be calculated using the ideal gas law.

4. Can the number of particles change during an experiment?

Yes, the number of particles can change during an experiment due to various factors such as chemical reactions, phase changes, or radioactive decay. It is important for scientists to monitor and account for any changes in the number of particles to ensure accurate results.

5. Are there any limitations to calculating the number of particles?

Yes, there are limitations to calculating the number of particles, especially in complex systems. For example, in a mixture of gases, it may be challenging to accurately determine the number of particles of each gas present. Scientists must consider these limitations and use appropriate techniques and assumptions to calculate the number of particles in a given system.

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