NaI detector in water source -- gamma & beta

In summary, the conversation discusses a simulation of the bersiv function of a NaI detector in a cylinder of water with a volumetric source of Potassium40 (90% beta 1.31 mev and 10% gamma 1.504 mev). The conversation also mentions defining electron and gamma volumetric sources in mcnpx (6), but it is not clear what "mcnpx (6)" means. The homework also includes information about the dimensions of the cylinder and detector. However, there is a lack of explanation for the tables of numbers and variables used in the attempted solution.
  • #1
ali khotbesara
3
0

Homework Statement


simulation of bersiv function of NaI detector it's in cylinder of water with volumetric source of Potassium40 (90% beta 1.31 mev & 10% gamma 1.504 mev )
how candefin define electron and gamma Volumetric source in mcnpx (6) ?
https://en.wikipedia.org/wiki/Potassium-40#/media/File:Potassium-40-decay-scheme.svg

Homework Equations


cylinder rad= 220 cm & high= 190 cm
detc rad= 6 cm & high= 8

The Attempt at a Solution


this is my solution:
NaI dect in wather source
1 1 -3.667 -4 5 -1 imp:p=1
2 2 -0.998 -3 6 -2 #1 imp:p=1
3 0 -7 #1 #2 imp:p=1
4 0 7 imp:p=0

1 cz 6
2 cz 220
3 pz 95
4 pz 4
5 pz -4
6 pz -95
7 so 250

mode p
m1 11023 0.4999 53127 0.5001
m2 1001 0.666657 8016 0.333343
sdef pos=0 0 0 rad=d1 axs=0 0 1 ext=d2 $ par=? gamma and beta
cell=1
si1 0 2
sp1 0 1
si2 -4 4
sp2 0 1
f8:p 1
e8 0.01 2998i 3
nps 100000
 
  • #3
ali khotbesara said:

Homework Statement


simulation of bersiv function of NaI detector it's in cylinder of water with volumetric source of Potassium40 (90% beta 1.31 mev & 10% gamma 1.504 mev )
how candefin define electron and gamma Volumetric source in mcnpx (6) ?
What does mcnpx (6) mean?
ali khotbesara said:
https://en.wikipedia.org/wiki/Potassium-40#/media/File:Potassium-40-decay-scheme.svg

Homework Equations


cylinder rad= 220 cm & high= 190 cm
detc rad= 6 cm & high= 8
What is "detc"?
ali khotbesara said:

The Attempt at a Solution


this is my solution:
NaI dect in wather source
The information in the table below is not clear. Also, what is "dect"? Above you have "detc". I don't understand either of these. Are they short for "detector"?
ali khotbesara said:
1 1 -3.667 -4 5 -1 imp:p=1
2 2 -0.998 -3 6 -2 #1 imp:p=1
3 0 -7 #1 #2 imp:p=1
4 0 7 imp:p=0
The table below is meaningless, as far as I can tell. What do "cz", "pz", and "so" mean? And what is the significance of the numbers?
ali khotbesara said:
1 cz 6
2 cz 220
3 pz 95
4 pz 4
5 pz -4
6 pz -95
7 so 250

mode p
m1 11023 0.4999 53127 0.5001
m2 1001 0.666657 8016 0.333343
sdef pos=0 0 0 rad=d1 axs=0 0 1 ext=d2 $ par=? gamma and beta
cell=1
si1 0 2
sp1 0 1
si2 -4 4
sp2 0 1
f8:p 1
e8 0.01 2998i 3
nps 100000
I don't know how you can expect anyone to help here, with tables of numbers with no explanation for what the numbers mean.
 

FAQ: NaI detector in water source -- gamma & beta

1. What is a NaI detector in a water source?

A NaI detector is a type of radiation detector that uses sodium iodide crystals to detect gamma and beta radiation in a water source. It works by measuring the amount of light produced when the radiation interacts with the crystals.

2. How does a NaI detector work?

A NaI detector works by converting gamma and beta radiation into light through the process of scintillation. The light is then measured by a photomultiplier tube and converted into an electrical signal, which can be analyzed to determine the presence and intensity of radiation in the water source.

3. Why is a NaI detector used in water sources?

A NaI detector is commonly used in water sources to monitor for radioactive contamination. It is highly sensitive and can detect even low levels of radiation, making it an effective tool for ensuring the safety of drinking water.

4. What are the advantages of using a NaI detector in a water source?

The main advantage of using a NaI detector in a water source is its high sensitivity to gamma and beta radiation. It is also able to detect a wide range of energies, making it useful for detecting different types of radioactive materials. Additionally, NaI detectors are relatively inexpensive and easy to use.

5. Are there any limitations to using a NaI detector in a water source?

While NaI detectors are effective for detecting gamma and beta radiation, they are not as sensitive to alpha radiation. This means that they may not be able to detect certain types of radioactive materials that emit alpha particles. It is important to use other types of detectors in addition to a NaI detector for a comprehensive analysis of water sources.

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