A measurement of possible Cs contamination on an air filter is mode on a daily b

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A measurement of possible Cs contamination on an air filter is mode on a daily basis. The measurement consists of placing the filter in a counting system with on absolute gamma ray counting efficiency of 15% at 662 keV for a period of 30 min. A new uncontaminated filter is then substituted in the counting system and another 30-mm background count recorded. The background count averages 100 counts per minute. Where should the critical level L, be set (in units of counts per 30-min measurement) to declare the positive presence of contamination following the criteria outlined in Lecture 24. Under these conditions, find the minimum detectable amount (MDA) of Cs on the filter as defined in the same Lecture.

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hey i hv come accross your ques just now only.. plz rate me .. i'll reply you your ans to ur inbox I would have to refer my old notes , i remembered there similar type problem is thr, but 1st rate me.

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