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Forum: Particles
Re: Question Superheavy nuclei (Lise-Lotte Andersson)
Re: None Re: Superheavy nuclei (Laurent Desorgher)
Date: 28 Jan, 2011
From: L.G. Sarmiento <L.G. Sarmiento>

Hello Lisa, regarding your question and the answer you got I MUST add something:

> By default in G4RadioactiveDecay only ion with Z up to 100 will be
> treated even if you add file for Z>100 isotope in the radioactive decay
> database. To change that limit you can use the macro command
> /grdm/nucleusLimits
> or change that in the C++ physics lists level with 
>  G4RadioactiveDecay::SetNucleusLimits()
> but I would recommand to do that rather at the macro command level.

What Laurent says about the limits is correct, Zmax = 100 and Amax=250. But no matter how you try to change those numbers you cannot do it. Either the macro command or via the SetNucleusLimits() mentioned will fail to achieve what you need since the argument of both of those methods is a G4NucleusLimits object and the constructor for those objects clearly establishes some specific limits:

Z -> [0,100] Amin -> [1,240] Amax -> [1-250]

So as far as I can see your only option is to modify the Geant4 source code and recompile your installation so it includes higher limits that you can later modify with the mentioned methods by Laurent. btw, just for simplicity I would go for the macro command level that has worked very well for me so far.

> > 2a) I've been trying to find out the format of the data files in order
> > to understand what I am actually simulating. Are there any documentation
> > of this? The PhotoEvaporation2.1 have 17 input columns for each gamma
> > ray and the RadioactiveDecay3.3 have 4 columns and a number of rows for
> > each nucleus. Some of the numbers in the files are easy to understand
> > and some are not clear to me at all.

Check the file $G4RADIOACTIVEDATA/README_RDM ! It will give you the description of the files :D

Cheers,

/Pico

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1 None: Re: Superheavy nuclei   (Lise-Lotte Andersson - 10 Feb, 2011)
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