How to Obtain Alpha and Beta Values for Primary and Secondary Particles of Carbon Ion

Scoring
1

Dear fluka experts:

I am currently able to achieve carbon ion scoring in the water phantom using the usrbin card ALPHA-D and SQBETA-D.However, I now want to distinguish between primary and secondary particles of carbon ions to obtain separate alpha, beta values for primary particles and alpha, beta values for secondary particles.

Since the directly scored ALPHA-D and SQBETA-D are results of alpha and beta multiplied by DOSE-H2O, my current idea is to use the COMSCW.f file to separate DOSE-H2O contributions from primary and secondary particles. Specifically, I would set the DOSE-H2O to zero for primary particles and to zero for secondary particles, respectively.

However, I am unsure if COMSCW.f file can achieve this and how to implement it for DOSE-H2O. I only know how to manipulate the dose of particles using comscw, but I am uncertain if this is reasonable for DOSE-H2O.

Could someone guide me on how to proceed with this?

I would appreciate any expert advice on this matter.

3

Hello @liweiguang,

I think there is a simpler solution, you can apply a filter to your usrbin using the AUXSCORE card, the primaries being called BEAMPART (5.1. Particles codes — FLUKA Manual).

If you want to use the routine COMSCW.f as you proposed, you can filter using the parameter LTRACK (FLUKA environment) to distinguish the primaries and the secondaries.

4

Thank you very much for your response. I will review the two reference links you provided.

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