Added photon Russian Roulette
Photon Russian Roulette, analogous to the Neutron Russian Roulette.
Photons are subject to rouletting only in volumes named "LAr*".
Some flags in SimFlags.py were shortened also for the NRR.
Edited by Miha Muskinja
Photon Russian Roulette, analogous to the Neutron Russian Roulette.
Photons are subject to rouletting only in volumes named "LAr*".
Some flags in SimFlags.py were shortened also for the NRR.