Physics > EXAM > NMTT 1409 Midterm Lab Written Review | 40 Questions with 100% Correct Answers | Updated & Verified (All)
NMTT 1409 Midterm Lab Written Review | 40 Questions with 100% Correct Answers | Updated & Verified
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NMTT 1409 Midterm Lab Written Review | 40 Questions with 100% Correct Answers | Updated & Verified What characteristics are needed in a good calibration standard? - >>>>- Ans: - (i). long Tp - (i ... i). monoenergetic (1 energy) - *Tech Tip: Cs-137 meets these requirements To center the photopeak in the middle of the window when using a scintillation well counter, the (i). ______, (ii). ______, or (iii). ______ could be adjusted. - >>>>- Ans: - (i). high voltage (HV) - (ii). window - (iii). gain The window used for calibration is (a). ______, whereas, the window used for imaging or sample counting is (b). ______. - >>>>- Ans: - (a). narrow [20 units (3%)] - (b). wider (20%) (a). Identify the formula used to calculate %difference from day to day on a scintillation well counter/thyroid probe and (b). discuss the expected results. - >>>>- Ans: - (a). (today's cpm - most recent cpm)/most recent cpm x 100 - (b). results should be +/- 5% [Show More]
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