cd ~/geant4.6.1/source/processes/decay/
make clean
$make
cd ~/geant4.6.1/source/track
make clean
$make
cd ~/geant4.6.1/source/particles/management/
make clean
$make
cd ~/geant4.6.1/source/particles/leptons/
make clean
$make
cd $lem
$make 
