||Improved Photographic Leak Test System for Sealed Sources of Radium 226.
Bedrosia, P. H. ;
Sensintaffa, E. L. ;
||Environmental Protection Agency, Rockville, Md. Office of Research and Monitoring.
( Radium isotopes ;
Radiation shielding) ;
( Alpha particle detectors ;
Photographic equipment ;
Radon isotopes ;
Radiation hazards ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Two photographic methods for leak testing sealed sources of radium 226 have been documented. Both procedures use high-speed photographic emulsion to detect light produced by interactions between a ZnS screen and alpha particles emitted by leaking sources. The Polaroid Lane 4 x 5 film system, which includes individually packeted photographic film and film holder, is used in these methods. (Author)