<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Dear Gate users,</div><div><br></div><div>I have been using the trackLength through</div><div>1. TrackLengthActor</div><div>2. phaseSpaceActor</div><blockquote><div><br></div><div>/gate/actor/addActor TrackLengthActor trackLength<br>/gate/actor/trackLength/save output/trackLength.root<br>/gate/actor/trackLength/setLmin 0 mm<br>/gate/actor/trackLength/setLmax 1 cm<br>/gate/actor/trackLength/setNumberOfBins 200<br><br>/gate/actor/addActor PhaseSpaceActor phaseSpaceWorld<br>/gate/actor/phaseSpaceWorld/save output/phaseSpaceWorld.root<br>/gate/actor/phaseSpaceWorld/attachTo world<br>/gate/actor/phaseSpaceWorld/enableProductionProcess true<br>/gate/actor/phaseSpaceWorld/enableTrackLength true<br>/gate/actor/phaseSpaceWorld/storeSecondaries true</div></blockquote><div><br></div><div>I obtain two differents results, how does this happen?<br></div><div><br></div><div><br data-mce-bogus="1"></div><div><strong>TrackLengthActor </strong></div><div><img src="cid:d3f4f9e86bef40614aed02e525484f2bf1088f71@zimbra" data-mce-src="cid:d3f4f9e86bef40614aed02e525484f2bf1088f71@zimbra" width="655" height="324"></div><div><br></div><div><br></div><div><br></div><div><strong>PhaseSpaceActor </strong></div><div><img src="cid:ddad20ad3ab83b399b64bf622d72d0008e1bf2b4@zimbra" data-mce-src="cid:ddad20ad3ab83b399b64bf622d72d0008e1bf2b4@zimbra" width="673" height="320"></div><div><br data-mce-bogus="1"></div><div>I have been testing this on a basic model : a 50x50x50 µm world full with Water and a gamma source of radius 10 µm.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Does anyone know how to explain these different results?<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Many thanks for the help,<br data-mce-bogus="1"></div><div>Regards,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Sarah Blind<br data-mce-bogus="1"></div><div><br></div><div><br></div></div></body></html>