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Forum: Physics List
Re: Question Advice on appropriate physics processes (Elaine Mcneice)
Re: Question Re: Advice on appropriate physics processes (Elaine Mcneice)
Date: 29 Sep, 2014
From: Davide Mancusi <Davide Mancusi>

On Mon, 15 Sep 2014 14:47:03 GMT, Elaine Mcneice wrote:
> Hello
> 
> The reaction I'm looking at is the 1H(19F,n)19Ne* in a hydrogen gas
> cell. After this reaction occurs, the 19Ne should either gamma decay to
> ground state or alpha decay to produce 15O. Are there specific physics
> processes that should be included, or packages that can be included into
> the simulation that will allow for the appropriate secondary nuclei to
> be produced and the reaction to occur?

Hi Elaine,

What incident energy are you interested in? I assume a few MeV per nucleon.

I believe there is no way to handle the gamma/alpha competition from a specific excited state short of writing your own process to do that. The models that are used at these energies (notably pre-equilibrium/de-excitation) are intrinsically statistical and cannot account for the details of the level scheme.

Documentation about new processes is still missing for the moment, but you should be able to get a few pointers by looking at the "Geant4 User's Guide for Toolkit Developers", sections 2.5 and 3.5 (maybe 3.3 too).

HTH, Davide

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