[Gate-users] Disable Processes

[Dimitrios Thanasas]

Hi Josh,

No it didn't. But I use low energies of gamma and e-, e+.
When I use Single Scattering of electrons (for better accuracy) instead of
Multiple Scattering the simulation takes longer but not much longer.

Dimitris

> Hi Dimitrios, thank you for writing back. Dd your simulation take longer
> with manually defined processes instead of physics list?
>
> Josh
>
>
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> ________________________________
> From: Dimitrios Thanasas <dthanas at uoa.gr>
> Sent: Thursday, June 13, 2019 7:56:51 AM
> To: Josh Knowland
> Cc: gate-users at lists.opengatecollaboration.org
> Subject: Re: [Gate-users] Disable Processes
>
> Dear Knowland,
>
> I also tried to disable a process after loading a PhysicsList and I
> couldn't manage to do it.
> A way to remove a process is to define manually the processes you want.
> A typical physics list for EM processes is the file physicslist_EM_std.mac
> in benchmarks of GATE installation folder (Rayleigh scattering is missing)
> but there are more details in usersguide.
> I tried it and it worked.
>
> Ragards,
> Dimitris Thanasas
>
>> All - I am having trouble running a macro with Bremsstrahlung disabled.
>> As
>> a test, I made a simple lead cube set as a Y90 source and recorded hits
>> in
>> it. Below are the physics setups and hits results for each test case.
>>
>> What is the correct way to remove processes from a physics list?
>>
>>
>>
>>
>>
>> ************************************************************
>> Test  - my typical physics declaration
>> ************************************************************
>> /gate/physics/addPhysicsList emstandard
>> /gate/physics/addProcess RadioactiveDecay
>> /gate/physics/addProcess Decay
>>
>> Process                                # Hits
>> annihil                                   1
>> compt                                   1689
>> conv                                      1
>> eBrem                                  17149
>> eIoni                                      46066
>> ionIoni                                  37153
>> msc                                        11684
>> phot                                      22404
>> RadioactiveDecay            74307
>> Transportation                  513
>>
>>
>>
>>
>> ************************************************************
>> Test 2 - attempting to disable Brems.
>> ************************************************************
>> /gate/physics/addPhysicsList emstandard
>> /gate/physics/removeProcess Bremsstrahlung e-
>> /gate/physics/removeProcess Bremsstrahlung e+
>> /gate/physics/addProcess RadioactiveDecay
>> /gate/physics/addProcess Decay
>>
>> Process                                # Hits
>> Annihil                                  2
>> compt                                   1793
>> conv                                      2
>> eBrem                                  17256
>> eIoni                                      45708
>> ionIoni                                  36947
>> msc                                        11438
>> phot                                      22624
>> RadioactiveDecay            73898
>> Transportation                  499
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Josh Knowland  ■  VP, Product Development  ■  Lucerno Dynamics, LLC
>>
>> Office: 919-371-6800 x 132
>> Cell: 919-673-1337
>>
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>
>
>