Excess Bismuth 214 Contours for an Aerial Radiological Survey of Abandoned Uranium Mines, Navajo Nation, 1994-1999, USEPA and USDOE
This line shapefile provides iso-contours of excess Bismuth 214 in counts per second based upon the 1764keV photopeak. Excess Bismuth 214 is based upon measured minus expected Bismuth 214 times a per flight determined constant equal to a ratio of statistically most likely values. Forty one (41) aerial radiological …