There was pretty recently software developed to do this:

Article Monte Carlo Particle Lists: MCPL

https://mctools.github.io/mcpl/

- I have a strong expertise in both G4 and MCNP, i am inclined to say that there is no easy method to directly convert one format to another.

- This is because these two simulation softwares are not related to each other.

- It would be easier to directly convert G4 to Gate or Topas, i have done this before.

- G4, Topas and Gate are all related.

- Gate and Topas are built from G4.

Hope this helps,

As a side note, if you want to collaborate with me on an MC project, i could probably design your sims fast and i have access to several supercomputers.

Thanks,

Kurt

Dear Kurt and Lukas,

Thank you for the quick answers. I will probably get closer of my partener to see if the MCPL tool can be a solution.

Kurt,

I really appreciate your proposal but sadly i cannot transfer any data for privacy issues.

Kind regards

Lucas

Dear Lukas,

There is no way to convert those inputs since both have different style TOTALLY!. To make it more clear, one is like apple while the other is like orange. From the input structure to used language, all the essential steps are totally different. If you are going to use both of them, you will need to learn the basics of input files. However, as a personal recommendation, try to focus on one of them.

Truly

I know of supermc develop by inest fds team in chine can do that for you.