Regarding Cartesian binning: zero score in few bins - the simulation was Run for a No. of primaries, say X, 1 cycle: Scoring in successive bins was obtained but few bins, in between, score ‘zero” values with ‘zero’ statistical error.
On increasing the no. of primaries, say Y (>X) I observed that the no. of bins scoring ‘zero’ have reduced but still one or more score ‘zero’.
Now, the question is: is this ‘zero’ score in between somewhere implies incorrectness of my input (because photon disappearing suddenly and then appearing again doesn’t seem logical ??) or I should keep on increasing no. of primaries to get a finite score in all the bins (yes, with 99 % statistical error, as it is 1 cycle) and then Run the simulation with good no. of cycles to reduce the statistical value to an acceptable value ?
Please find attached the input and .lis files for increasing number of primaries to show what I said above. (Zero scores in USRBIN “4 DERear1m”). Surprisingly, USRBIN “2 DEFron1m” scores values in all the bins. I don’t understand why this is happening ? The source is isotropic.
Thanks and regards,