[Gate-users] About the performance comparison between LSO ans LYSO

[Leo Read]

The material definition of LYSO in GateMaterials.db is incorrect,
particularly the density of 5.37 g/cm3 is a lot lower than the typical
value of ~7.1-7.4. I'm not sure why this is the case, but it appears the
file has not changed since the the earliest version of Gate. I'm using this
definition (courtesy Marc Chamberland):
LYSO:   d=7.36 g/cm3; n=4 ; state=Solid
        +el: name=Lutetium ; f=0.714467891
        +el: name=Yttrium ; f=0.04033805
        +el: name=Silicon; f=0.063714272
        +el: name=Oxygen; f=0.181479788

That should resolve any significant difference between LYSO and LSO.

Best of luck!


On Sat, Mar 8, 2014 at 9:07 PM, 张春晖 <arnoxiaolei86 at gmail.com> wrote:

> Hello everyone:
>        I did two experiments using GateV6.2, The conditions of these
> two experiments are same with each other except the material of the
> crystal (using LSO in first experiment and LYSO in secone one), but
> the Coincidences number recorded in the first experiment is treble as
> many as that recorded in the second experiment. What a bad performance
> of LYSO! Can anyone tell me why? The macros are in the attachment.
> Thanks a lot!--Chunhui Zhang
>
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20140311/18bc9b79/attachment.html>