[gate-users] source of germanium68

[Eric Vandervoort]

Hello Ross and Murial,
Thanks for the code, Ross. It looks like your spectra are much closer to
the exerimental Ge68/Ga68 spectra than what I've been using.
Thanks,
Eric

On Mon, 13 Jun 2005, Schmidtlein, Ross/Sloan-Kettering Institute wrote:

> Hi Eric and Murial,
>
> I added a Ge68/Ga68 source a while back it may be in the archives (I ignored the gamma's but I did add a specific output for each beta decay branch).
>
> ross
>
> Original Message....
> Hi Sebastien,
>
> I completed modifying the code to better represent the spectrum for
positron emission from Ga-68.  The details are commented in the code.
I checked it against http://ie.lbl.gov/toi.html and it looks very close.
>
> ross
>
> -----Original Message-----
> From: gate-users-bounces at lphe1pet1.epfl.ch [mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of evander at phas.ubc.ca
> Sent: Monday, June 13, 2005 1:49 PM
> To: GATE feedback and helpline for Users
> Cc: mviala at clermont.in2p3.fr; gate-users at lphe1pet1.epfl.ch
<> Subject: Re: [gate-users] source of germanium68
>
>
> Hi Murial,
> I've added a Ge-68 Beta-energy spectrum to Gate. I attached the source code to this email. Just put the files with extensions .cc in the gate/src/ and the .hh files in your gate/include directory, and recompile Gate. You can get the right germanium spectrum and half-life by using the
> commands:
>
> /gate/source/LINE/setForcedHalfLife 2.34101E+007 s /gate/source/LINE/gps/energytype Germanium68
>
> I've emailed you directly so you will get the attachments but I imagine that these attachments will be scrubbed for the other gate-users.  If anybody else wants them, I guess you can email me directly.
>
> One thing I should note, though: I've used a different model for the energy spectrum than the other Gate beta spectra. I just use the Fermi spectrum for the kinetic energy (KE) of the beta:
> KE=sqrt(K^2+2*K*(0.511))(K_max-K)^2(K+0.511) with K_max = 1.899 MeV. Gate uses some other model that I can't get the reference for (Behrens H and Janecke J 1969 "Numerical Tables for Beta-Decay and Electron Capture Landolt-Börnstein, New Series, Group I" vol 4 ed H Schopper, Berlin: Springer). My equation is praobably good enough for most purposes... it gives pretty much the right spectrum and close to the correct mean (the Fermi mean = 0.800 MeV and the experimental mean 0.836 MeV), but it probably could be a bit more accurate.
>
> Best Regards,
> Eric
>
>
> >
> >
> > Hi all,
> >
> > I need to know how the spectrum of energy within Gate is coded. Which
> > are the emission lines which you took into account?
> >
> > I must use a source of germanium68.
> > Which are the lines which I must take into account to code them in
> > Gate?
> >
> > Best regards,
> >
> >
> > Muriel
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> >
>