Before revision: This is accomplished by letting the ionizing radiation emitted by the radioactive isotopes hit a luminescent material (scintillator ), which in turn emits photons that generate electricity upon striking a photovoltaic cell.
After revision: or phosphorThis is accomplished by letting the ionizing radiation emitted by the radioactive isotopes hit a luminescent material (scintillator ), which in turn emits photons that generate electricity upon striking a photovoltaic cell.