<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div>Hi Daniel,</div><div><br></div><div>since we are using optical photons successfully, I had a quit look</div><div>at the macros of example1 in example_OPTICAL. In fact, this example1 did</div><div>not work under GATE 4 either. The beamsource is directed into the opposite</div><div>direction never hitting the crystal! </div><div>I modified and tested the example1 and found it working. I attach</div><div>the new macro/beamsource.mac file and also the prerunGate.mac, since</div><div>I included some extensions there you might find interesting.</div><div><br></div><div>I hope this is helpful for you and other users.</div><div><br></div><div>Kind regards,</div><div><br></div><div>Uwe Pietrzyk</div><div><br></div><div></div></body></html>