[gate-users] Re: gate-users Digest, Vol 12, Issue 23

Sat Apr 2 16:33:17 CEST 2005

Hi Aurelien,
To have to introduce the Macor like that:

Macor:  d=2.20 g/cm3 ; n=7  ; state=solid
        +el: name=Oxygen      ; f=0.563
        +el: name=Fluorine  ; f=0.04

        +el: name=Boron    ; f=0.028

        +el: name=Potassium ; f=0.0667

                +el: name=Magnesium ; f=0.085

                +el: name=Aluminium ; f=0.064

        +el: name=Silicon ; f=0.1533

Cheers

Charbel MERHEB

Laboratoire d'imagerie moléculaire

Hôpital Tenon - Paris

Tel:   01 56 01 74 89

Fax: 01 56 01 61 71

gate-users-request at lphe1pet1.epfl.ch wrote:
Send gate-users mailing list submissions to
gate-users at lphe1pet1.epfl.ch

To subscribe or unsubscribe via the World Wide Web, visit
http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users

Please use the GATE's site webmaster e-mail to reach the person
managing the list.

Today's Topics:

1. GateMaterials.db(2) (Aur?lien Vasseur)
2. (Aur?lien Vasseur)

----------------------------------------------------------------------

Message: 1
Date: Wed, 30 Mar 2005 17:40:31 GMT 
From: "Aur?lien Vasseur" 
Subject: [gate-users] GateMaterials.db(2)
To: "Gate mailing-list" 
Message-ID: <1112204431008481 at lycos-europe.com>
Content-Type: text/plain; charset="windows-1252"

Sorry for my previous messages, I noticed that they were send in html format (thus they became unreadable). I send them again in text format. If someone could answer me, thanks in advance.

Hi,

I defined a new material as:

Macor: Zeff=10.047 ; A=20.253 g/mole ; d=2.20 g/cm3 ; state=solid
+el: name=auto ; n=1

in the GateMaterials.db for a structure I named outWin. The Gate display when setting this new material is:

/gate/outWin/setMaterial Macor
Macor : WARNING from G4Element::G4Element ! Trying to define an element as a mixture directly via effective Z.

Is my definition wrong? Has this message consequences on physics processes?

Thanks a lot for your reponses.

Aurelien Vasseur

C est le moment de dynamiser votre boîte mail en découvrant les offres CaraMail Max et Pro - http://www.caramail.com

------------------------------

Message: 2
Date: Wed, 30 Mar 2005 18:51:40 GMT 
From: "Aur?lien Vasseur" 
Subject: [gate-users] 
To: "Gate mailing-list" 
Message-ID: <1112208700030986 at lycos-europe.com>
Content-Type: text/plain; charset="windows-1252"

Greetings,

I'm trying to simulate a simple geometry to access only primary interactions. It consists of a block of lead (9cm thick), and I shoot gamma-ray (511keV, 10Bq for 1 sec) in one direction (Source-Surface Distance=10cm). I have no phantom. I set electron cut to 1 km, X- and Delta-Ray cuts to 1 GeV. I activate only photoelectric and Compton effects (low energy for both).
I finally obtain 14 events.

I cannot understand why I have so many Compton effects (20 single diffusions and 7 double) with nCrystalCompton (on the Hits branch) (attached) whereas I have only 10 LowEnCompton on the processName sheet (attached). Could someone explain it to me? The GATE display gives me well 10 Compton.
Moreover, on the Gate display, I can't understand this lines:

*********************************************************************************************************
* G4Track Information: Particle = gamma, Track ID = 1, Parent ID = 0
*********************************************************************************************************

Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName
0 0 0 0 0.511 0 0 0 world_P initStep
1 100 -1.22e-14 -6.12e-15 0.511 0 100 100 level1_P Transportation
2 105 -1.29e-14 -6.46e-15 0.349 0.162 5.43 105 level1_P LowEnCompton
3 108 -1.76 4.19 0.148 0 5.38 111 level1_P LowEnCompton
:----- List of 2ndaries - #SpawnInStep= 1(Rest= 0,Along= 0,Post= 1), #SpawnTotal= 1 ---------------
: 108 -1.76 4.19 0.202 e-
:----------------------------------------------------------------- EndOf2ndaries Info ---------------
4 108 -1.36 3.05 0 0.0158 1.39 112 level1_P LowEnPhotoElec
:----- List of 2ndaries - #SpawnInStep= 1(Rest= 0,Along= 0,Post= 1), #SpawnTotal= 2 ---------------
: 108 -1.36 3.05 0.132 e-
:----------------------------------------------------------------- EndOf2ndaries Info ---------------

*********************************************************************************************************
* G4Track Information: Particle = e-, Track ID = 3, Parent ID = 1
*********************************************************************************************************

Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName
0 108 -1.36 3.05 0.132 0 0 0 level1_P initStep
1 108 -1.36 3.05 0 0.132 0.0428 0.0428 level1_P eIoni

*********************************************************************************************************
* G4Track Information: Particle = e-, Track ID = 2, Parent ID = 1
*********************************************************************************************************

Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName
0 108 -1.76 4.19 0.202 0 0 0 level1_P initStep
1 108 -1.76 4.19 0 0.202 0.0826 0.0826 level1_P eIoni
>>> Event 3

Why Gate tracks the electron #2 whereas it comes from a Compton effect? It is the only Compton electron tracked.

Has anyone explanation for it? Please help me.

Aurélien Vasseur

PS: I am working with:
Mac OSX 10.3.8
CLHEP1.8.2.0
GEANT4.6.2.p02
GATE1.0.2-4.6.2
Root3.10

C est le moment de dynamiser votre boîte mail en découvrant les offres CaraMail Max et Pro - http://www.caramail.com

-------------- next part --------------
A non-text attachment was scrubbed...
Name: nCrystalCompton.tiff
Type: application/octet-stream
Size: 49888 bytes
Desc: not available
Url : http://lphe1pet1.epfl.ch/mailman/private/gate-users/attachments/20050330/d21491c1/nCrystalCompton.obj
-------------- next part --------------
A non-text attachment was scrubbed...
Name: processName.tiff
Type: application/octet-stream
Size: 48782 bytes
Desc: not available
Url : http://lphe1pet1.epfl.ch/mailman/private/gate-users/attachments/20050330/d21491c1/processName.obj

------------------------------

_______________________________________________
gate-users mailing list
gate-users at lphe1pet1.epfl.ch
http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users

End of gate-users Digest, Vol 12, Issue 23
******************************************

---------------------------------
 Découvrez le nouveau Yahoo! Mail : 250 Mo d'espace de stockage pour vos mails !
Créez votre Yahoo! Mail
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20050402/398e1e69/attachment.htm>