#==========================- Pre-initialisation parameters -=========================

#choose the type of phantom
/changePhantom/setPhantom Phantom_sensitivity 

#set the activity in the phantom
/change/Activity 3840000 becquerel #3840000 becquerel

#Set the halflife of the isotope in units of second
/change/HalfLife 6586.2 s #Halflife of F-18


#Change the size of the phantom
/changePhantom/Radius 4.75 mm # select 3.2, 4.75,6.35,7.95,9.55 mm
/changePhantom/Length 705 mm

#Remember to change the source position along with the phantom position 
/changePhantom/position 0 0 0 mm

/run/initialize
/run/verbose 2

#/gps/particle ion
#/gps/ion 9 18 0 0 # F-18
/gps/particle e+
/gps/energy 0
/gps/pos/type Volume
/gps/pos/shape Cylinder
/gps/pos/centre 0 0 0 mm 
/gps/pos/radius 0.5 mm 
/gps/pos/halfz  350 mm
/gps/ang/type iso

#/random/setSeeds  1 2

/run/beamOn 1000000