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Forum: User Requirements
Re: None superheavy nuclei (Lise-Lotte Andersson)
Date: 14 Mar, 2011
From: Makoto Asai <Makoto Asai>

Dear Lise-Lotte,

Thank you for your input.
We will consider how we can address to this requirement
and report our view at the next Technical Forum.
Let me and some of our developers related on this matter
communicate with you separately.

Kind regards,
Makoto Asai

> -----Original Message-----
> From: Lise-Lotte Andersson []
> Sent: Monday, March 14, 2011 7:33 AM
> To: userreqs-g4hn
> Subject: superheavy nuclei
> *** Discussion title: User Requirements
> Dear Geant4 developers, My name is Lise-Lotte Andersson. I am an
> experimentalist working in the currently very expanding field of
> superheavy nuclei and the production of new elements.
> I am writing to you with a new user requirement. I understand that the
> Geant4 code was developed mainly to suite the field of particle physics
> but at present the codes are used in so many more fields than this. The
> usage in nuclear structure and nuclear spectroscopy is already really
> wide and now I would like to apply your codes in the most extreme part
> of the nuclear chart, far far away from single particles, in the field
> of superheavy nuclei. This kind of Geant4 simulations are not unheard of
> before, some publications can already be found (example Lopez-Martens et
> al NPA 852, 15, 2011) and the field is growing. The TASISpec
> spectroscopy setup at GSI and the SAGE spectrometer at JYFL are two
> example of experimental setups aimed towards superheavy element studies
> which are currently developing Geant4 codes to be able to simulate
> results and predict outcomes of future experiments using Geant4.
> At present the Geant4 source codes impose restrictions in the form of
> limits on proton (Z) and atom (A) number which makes it impossible to
> simulate superheavy nuclei using the RadioactiveDecay and PhotonDecay
> files from the Geant4 datafiles (even when I produce my own z102.a253
> etc data files in these folders).
> The community of experimental studies of superheavy nuclei will continue
> to evolve and grow in the future and the Geant4 simulations would be a
> fantastic tool to use also in this field. Would it be possible to
> consider adjusting the Geant4 source code so it does not forbid the
> addition and handling of datafiles for the higher proton and neutron
> numbers? I would say maybe even allow up to ~Z=126 and ~N=184 (A=310)
> which is where some of the present models predict the next magic
> numbers.
> I would be most grateful for a reply. Thank you, Lise-Lotte
> -------------------------------------------------------------
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1 None: Re: RE: superheavy nuclei   (Laurent Desorgher - 16 Mar, 2011)
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