if ( gMC->IsTrackEntering() ){
Float_t xyzd[3] ;
gMC -> Gmtod (xyzte, xyzd, 1); // transform coordinate from master to daughter system
- if (xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2.+0.001){ //Entered close to forward surface
+ if (xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2.+0.1){ //Entered close to forward surface
TParticle * part = 0 ;
Int_t parent = gAlice->GetMCApp()->GetCurrentTrackNumber() ;
while ( parent != -1 ) {