Title :
Dose enhancement in a room cobalt-60 source
Author :
Simons, M. ; Pease, R.L. ; Fleetwood, D.M. ; Schwank, J.R. ; Krzesniak, M.F.
Author_Institution :
Res. Triangle Inst., Research Triangle Park, NC, USA
fDate :
12/1/1997 12:00:00 AM
Abstract :
A room Co-60 source was characterized using thermoluminescent dosimeters (TLDs) and pMOS RADFETs. Measurements were made over a range of dose rates between 0.8 and 100 mrad(Si)/s. Dose enhancement (DE) was measured using RADFETs with and without gold-flashed kovar lids. DE factors ranged from 1.05 to 2.35. A method was developed to predict dose enhancement as a function of position and test configuration. This method involves separation of direct and scattered gamma dose rate contributions
Keywords :
MOSFET; bipolar analogue integrated circuits; gamma-ray effects; integrated circuit reliability; integrated circuit testing; thermoluminescent dosimeters; Co; bipolar linear microcircuits; dose enhancement; dose rates; gamma dose rate contributions; kovar lids; pMOS RADFETs; test configuration; thermoluminescent dosimeters; total ionizing dose testing; Aluminum; Attenuators; Concrete; Electromagnetic scattering; Electrons; Laboratories; Lead; Packaging; Particle scattering; Testing;
Journal_Title :
Nuclear Science, IEEE Transactions on
