Title :
The interaction of fission fragments with electron-beam charged polyfluoroethylene propylene
Author :
Berggren, Stephen R. ; John, George
Author_Institution :
US Air Force Inst. of Technol., Wright-Patterson AFB, OH, USA
fDate :
12/1/1989 12:00:00 AM
Abstract :
The interaction of fission fragments with electron-beam-charged polyfluoroethylene propylene (FEP) produces a detectable signal characteristic of the event. Both an electrical signal and luminescence were observed. Fission of 235U by thermal neutrons produces fission fragments with energies of 60 to 100 MeV that deposit their energy in 14 to 20 μm of FEP. Aluminized FEP with a thickness of 25.4 μm was charged to 10-7 C/cm2 and exposed to fission fragments. They produced electrical pulses from charges of ~10 -16 C that were induced on the electrodes. Uncoated electrets emitted a flash of light when struck by a fission fragment. Both phenomena were transient in that aging or annealing of the electret eliminated the signal. The size and transient nature of the electrical signal be explained by a charge-intersection model for the interaction of the ions
Keywords :
energy loss of particles; ion beam effects; ionoluminescence; luminescence of organic solids; polymers; 14 to 20 micron; 60 to 100 MeV; aging; annealing; charge-intersection model; electrical signal; electron-beam charged polyfluoroethylene propylene; fission fragments; luminescence; thermal neutrons; uncoated electrets; Aging; Annealing; Charge carriers; Electrets; Electrodes; Event detection; Kinetic energy; Luminescence; Monitoring; Neutrons;
Journal_Title :
Electrical Insulation, IEEE Transactions on
