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A 65-kg person is accidentally exposed for 240 s to a15-mCi source of beta radiation coming from a sampleof 90Sr. (a) What is the activity of the radiation source indisintegrations per second? In becquerels? (b) Each betaparticle has an energy of 8.75 x 10-14 J. and 7.5% of theradiation is absorbed by the person. Assuming that theabsorbed radiation is spread over the person’s entire body,calculate the absorbed dose in rads and in grays. (c) If theRBE of the beta particles is 1.0, what is the effective dosein mrem and in sieverts? (d) Is the radiation dose equal to,greater than, or less than that for a typical mammogram(300 mrem)?

A 65-kg person is accidentally exposed for 240 s to a15-mCi source of beta radiation coming from a sampleof 90Sr. (a) What is the activity of the radiation source indisintegrations per second? In becquerels? (b) Each betaparticle has an energy of 8.75 x 10-14 J. and 7.5% of theradiation is absorbed by the person. Assuming that theabsorbed radiation is spread over the person’s entire body,calculate the absorbed dose in rads and in grays. (c) If theRBE of the beta particles is 1.0, what is the effective dosein mrem and in sieverts? (d) Is the radiation dose equal to,greater than, or less than that for a typical mammogram(300 mrem)?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A 65-kg person is accidentally exposed for 240 s to a
15-mCi source of beta radiation coming from a sample
of 90Sr. (a) What is the activity of the radiation source in
disintegrations per second? In becquerels? (b) Each beta
particle has an energy of 8.75 x 10-14 J. and 7.5% of the
radiation is absorbed by the person. Assuming that the
absorbed radiation is spread over the person’s entire body,
calculate the absorbed dose in rads and in grays. (c) If the
RBE of the beta particles is 1.0, what is the effective dose
in mrem and in sieverts? (d) Is the radiation dose equal to,
greater than, or less than that for a typical mammogram
(300 mrem)?

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