Dear collegues, I have a question regarding the implementation of composite materials in Geant4. I am currently working at the realization of an hybrid scintillating material, consisting of an amorphous matrix (lead glass) containing fragments of common scintillators (LYSO, CsI,…). I want to reprod…

There is another solution that allows to quickly fill the parallelepiped with 30000 spheres, namely storing positions in several std::vector instead of one. In the attachment you can find DetectorConstruction.cc and vis.mac (rename the attached vis.mac.txt) for the example B1: [spheres] DetectorC…

In the post below there is an example how to fill a volume with randomly distributed spheres without overlaps: [image] Nanoparticle distribution Geometry, Fields and Transportation Below is an example of how to generate one hundred small spheres randomly distributed insid…

Hello, thank you very much for your reply. I already tried something similar, but my problem is that I have to place a very large number of spheres (I want the scintillating fragments to have a volume fraction of at least 30%), therefore the computational time is too large. Do you think that the pro…

Hello! If I understand correctly, you need to place ~30000 spheres. Constructing a boolean solid with that many holes is not very good idea, the simulation will be extremely slow. But you can speed up the placement of spheres by using one of the following approaches: Generate required number of n…

Thank you very much, this solution is actually very efficient! Do you think it is a suitable strategies for even higher concentration? (I would like to reach a 60% volume fraction occupied by the spheres). Thank you very much again

If subdivide the parallelepiped into 80.000 cubic cells (1x1x1 mm^3) and fill all of them with spheres then the spheres will occupy 52% of the volume. In case if the spheres are placed randomly then, I think that they will occupy even less fraction. Maximum possible fraction is ~74%. It’s reachabl…

Thank you very much, this actually works perfectly for me

Implementation of composite materials

Geometry, Fields and Transportation

evc February 26, 2025, 7:53pm 2

In the post below there is an example how to fill a volume with randomly distributed spheres without overlaps: