<div dir="ltr">Gate Users,<div><br></div><div>I am still trying to solve my problem of not being able to generate optical photons with an alpha source and a scintillator. When I run my current simulation with a gamma source starting right next to my scintillator, I generate optical photons no problem. However, when I change to an alpha source, it seems that my alpha particles are not depositing any energy as they travel? As my run progresses, I get messages like:</div>
<div><br></div><div><br></div><div>***********************************************************************************************</div><div>* G4Track Information: Particle = alpha, Track ID = 1, Parent ID = 0</div><div>
***********************************************************************************************</div><div><br></div><div>Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName</div><div> 0 0 0 25 5.3 0 0 0 scanner_phys InitStep</div>
<div> 1 0 0 25 5.3 0 0.01 0.01 LayerOne_phys Transportation</div><div> 2 0 0 -25 5.3 0 50 50 pmt_phys Transportation</div>
<div> 3 0 0 -35 5.3 0 10 60 scanner_phys Transportation</div><div> 4 0 0 -50 5.3 0 15 75 world_phys Transportation</div>
<div> 5 0 0 -200 5.3 0 150 225 OutOFWorld Transportation</div><div><br></div><div><br></div><div>LayerOne is my scintillating volume, LSO.</div><div><br></div>
<div>The physics I have included are:</div><div>hMultipleScattering alpha (sometimes included, it does not change the fact that no energy gets deposited)</div><div>IonInelastic</div><div>G4LEAlphaInelastic alpha</div><div>
Scintillation alpha</div><div>OpticalRayleigh</div><div>OpticalAbsorption</div><div>OpticalBoundary</div><div><br></div><div><br></div><div>Has anyone worked with an alpha source at all before? Is there a key physics process I am missing? Alphas should deposit all of their energy within a few interactions, and should most definitely be stopped by my scintillator layer, a 5cm cube of LSO. <br>
<br>Any help is greatly appreciated. I have been struggling with this for quite some time.</div><div><br></div><div>Thank you,</div><div><br></div><div>-Amy</div></div>