: . os fen a ntnei le ey caeen YL ain A Pt ea stint am ahs i“ ne> sat posure was less than l0’r. This asswiption is basad on data showing that the response of seintillation=type crystals is not adversely affectod by total oxposures of less than lO®r (Refsrence 7). 3.2.2 Special Detector System. The data from Station 220.11 on Charide, Shot I, showed that the two heads did not track. This was attributed to the presence of scattered radiation that entered the shieldTASLE 9.2 Gaia RADIATION OCSAGE Conrarison of dosage measirvasnts cade with NBS type phatographis dosimeters on Froject 2.1 and dosaya measurewcta at secs ranges nade by sclotillatica datectors un Project 2.24 Distanw to Ground Zere Prosect Station feet Doee & : Tine bh Shoat ls 83,72 2.1 2.2 210.23 220.08 19 133 H+ 82 He 20 41,372 2.1 262 210.12 220.12 6,000 3.735 He 78 Re 2 15,59 2d 262 210.21 220.07 2,989 1,237 He 104 Re Jo Shot 43 . heaes ke aere tl erateiy a ed area through the light pipe. The sonsitivity of the photomultiplier tube to radiation required the presonce of shielding to ettenuate the radiation in thea sane order of magnitude as the neutral-density filter. Vion it proved impractical to Increaca the shielding, the use of neutreldensity filters to increase the datector's uprer linit vas sbandonad for rouaining shota. a7 SECRET ee ee etn een re wt on en oe ~ ee ees ~~ etee tte- ae mee eteren sali tibial aasiens iabitaenemneneaientiedameahenantinemmmatatimanteaantananniatas teem ae >