— determined. UNCLASSIFIEN For & given exposure in roentgens the density on the flin is higher at 4 MEV than at 1 MEV, and it continues to rise vith ine rreasing enercy to the maximum of the range covered. Interpretati of file bedge readings resulting from exposures to I~ or gam over a range of energies from approximately 10 KV to 10 MEV Sn now possible, ings. - A beta exposure may also be determined from the fila Both of these are interpreted from the differences in probi densities read under a lead-covered section, a brass-covered sectian, and an uncovered section of the filnz. Some of this work was published in April as LA-1107, *, Method for Monitering Ierays Using Eastman Type K Film". This yc 4g being continued in the Biophysics Section. 2) Started During the Past Year: A report is being compiled of the processes at the Laboratory which are carried cut by remote control. A pubdlicati will be forthcoming early next year including as many of these pr cesses as security will allow, Decontamination studies were started. A mamual compiled of the published material dealing with the subject. A vehicle decontemination pit is being enclosed to improve faciliti for work in cold veather. In order to determine the ratio of the wrist badg readings to the finger exposures, plastic ring badges were initially tested. These badges proved unsatisfactory because the fils contginer - 16 - oye 4 “o* ary 00130915 018 1O4UNNSS LANL