[Gate-users] About how to use Na22 as the source

[Michaela Gaens]

Hi again,

so you are not getting any output at all, now I see. You have to make 
sure to initialize your simulation at the right point in your macro. If 
you put

/gate/run/initialize

before the definition of your source, it should work.

Michaela

On 03/20/2014 02:02 PM, 张春晖 wrote:
> Hello Michaela
> I am not looking for the third gamma (1275 keV),  I mean I could not
> find the gamma photon-pair (511kev) during the simulation. Thanks!
>
> 2014-03-20 20:16 GMT+08:00, Michaela Gaens <m.gaens at fz-juelich.de>:
>> Hi,
>>
>> I'm guessing you checked the energy spectrum to look for the third gamma?
>> Just taking a quick look at your macro I think you are not seeing it because
>> you limit the energy window for your singles to 800 keV. This way  events
>> from the 1275 keV gamma will not be stored in your output file.
>>
>> Best regards,
>> Michaela
>>
>> On 03/20/2014 01:05 PM, Marc Chamberland wrote:
>> Hi,
>>
>> For people to help you, you should tell the mailing list how you determined
>> that it is not producing the gamma ray.
>>
>> Cheers,
>> Marc
>>
>>
>>
>> __________________________
>>
>> Marc Chamberland, MSc
>> PhD candidate
>> Department of Physics
>> Carleton University
>> Ottawa (ON)
>>
>> On Mar 20, 2014, at 8:02, ???
>> <arnoxiaolei86 at gmail.com<mailto:arnoxiaolei86 at gmail.com>> wrote:
>>
>> Hello everyone:
>> I am using gate v6.2 for the simulation of our PET system, and want to
>> use Na22 as the source. My code is in the attachment. It seem not to
>> produce the Gamma. I do not know whether there is something wrong with
>> my source or my physical process. Could anyone send me a complete
>> instance with Na22 as the source? Thanks a lot! Best!
>>
>> --
>> Chunhui Zhang from XiDian University
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