# NaI detector in water source -- gamma & beta

## 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 $par=??? gamma and beta cell=1 si1 0 2 sp1 0 1 si2 -4 4 sp2 0 1 f8:p 1 e8 0.01 2998i 3 nps 100000 ## Answers and Replies Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? Mark44 Mentor ## Homework Statement simulation of bersiv function of NaI detector it's in cylinder of water with volumetric source of Potassium40 (90% beta 1.31 mev & 10% gamma 1.504 mev ) how candefin define electron and gamma Volumetric source in mcnpx (6) ? What does mcnpx (6) mean? ali khotbesara said: https://en.wikipedia.org/wiki/Potassium-40#/media/File:Potassium-40-decay-scheme.svg ## Homework Equations cylinder rad= 220 cm & high= 190 cm detc rad= 6 cm & high= 8 What is "detc"? ali khotbesara said: ## The Attempt at a Solution this is my solution: NaI dect in wather source The information in the table below is not clear. Also, what is "dect"? Above you have "detc". I don't understand either of these. Are they short for "detector"? ali khotbesara said: 1 1 -3.667 -4 5 -1 imp:p=1 2 2 -0.998 -3 6 -2 #1 imp:p=1 3 0 -7 #1 #2 imp:p=1 4 0 7 imp:p=0 The table below is meaningless, as far as I can tell. What do "cz", "pz", and "so" mean? And what is the significance of the numbers? ali khotbesara said: 1 cz 6 2 cz 220 3 pz 95 4 pz 4 5 pz -4 6 pz -95 7 so 250 mode p m1 11023 0.4999 53127 0.5001 m2 1001 0.666657 8016 0.333343 sdef pos=0 0 0 rad=d1 axs=0 0 1 ext=d2$ 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.