‘ wy 4 10%) to* £ vio _ ° vd 2 ¥ * a Pd Wig! oftP. E— E KK | , fn oe 0:7 Febuary oO O-:8 Febuary 422) Febduory Tod oo Pod 9 wt| 107 10"! 10° ior 108 Frequency, pulse/minute Figure 2.¢ Graph showing a typica: calibration curve fur tae Conrad detectors. These detectors were colitreted with the 2CC-curie Fource @.d tune eSCenv xray generator.

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