20) An x-ray machine operating at 80 kVp for 100 mAs with 1 mm Al added filtration produces an exposure of 120 mR/hr at 40 inches. If the corresponding half-value layer is 2.1 mm Al, how much total added filtration would reduce the exposure at 40 inches to 60 mR/hr? a) 1 mm Al b) 1.1 mm Al c) 2.1 mm Al d) 3.1 mm Al e) 5.1 mm Al

20) An x-ray machine operating at 80 kVp for 100 mAs with 1 mm Al added filtration produces an exposure of 120 mR/hr at 40 inches. If the corresponding half-value layer is 2.1 mm Al, how much total added filtration would reduce the exposure at 40 inches to 60 mR/hr? a) 1 mm Al b) 1.1 mm Al c) 2.1 mm Al d) 3.1 mm Al e) 5.1 mm Al

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter9: Atomic Absorption And Atomic Fluorescence Spectrometry

Section: Chapter Questions

Problem 9.12QAP

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