hi. I'm trying to simulate a pretty simple geometry including nanoparticles by mcnp. my whole cod is as below:1
project nano
C Cell cards
1 2 -1 -7 +8 +9 -10 -11 +12 fill=1
2 1 -0.00125 -1 +2 -3 +4 -5 +6 #1
3 2 -1 14 -15 16 -17 fill=2 lat=1 u=1
4 3 -19.3 -13 u=2
5 2 -1 13 u=2
6 0 1:-2:3:-4:+5:-6
C Surface cards
1 px 5
2 px -5
3 py 5
4 py -5
5 pz 5
6 pz -5
7 px 0.5
8 px -0.5
9 py 1.5
10 py 2.5
11 pz 0.5
12 pz -0.5
13 sy 2 7E-6
14 pz -7E-6
15 pz 7E-6
16 px -7E-6
17 px 7E-6
C DATA cards
mode e
IMP:e 1 1 1 1 1 0
SDEF pos=0.1 0.1 0.1 ERG=d1 PAR=3 CELL=2
SI1 L 0.36 0.71 0.81
SP1 0.3 0.49 0.2
M1 6012 -0.000150
7014 -0.784431
8016 -0.210748
18000 -0.004671
M2 1001 2
8016 1
M3 79197 1
*f8:e 1
NPS 1000000
C END of data cards
it is about a tumor ( cell 1) that is filled by gold nano-particles. nano-particles have a sphere shape with a radius equal to 70 nanometers. in order to fill the tumor by nano-particles I created a cube with each side equal to 150 nanometers ( cell 3 ) and I filled it by nano-spheres ( cell 4 & 5). And at the end cell, 1 ( the tumor ) is a lattice of cell 3 ( which includes nano-spheres ).
the problem is when I run the code, dose tally at cell 1 is always zero! and "track entering" and "population" in every cell except 2 and 5 are zero too! In another word, no particle enters cells 1 & 3 and 4! specifically, cell 1 is more important because I want to calculate dose in tumor. I can't see where is my mistake, so please let me know if you noticed anything.
Is there any link for downloading MCNPX code?@Varatharaj Chandraraj
In the definition of lat, it should be noted that the numbers of surfaces that are parallel to each other must be written one after the other. Otherwise, the program will stop with an error.
nano scale cant be calculated in MCNP ... only in surface cards only not in tally
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