Q. 4. Natural radioactivity is a spontaneous and self disruptive activity exhibited by a number of heavy elements in nature. Thus a heavy element disintegrates by itself without being forced by any external agent to do so. According to radioactive decay law, the number of atoms disintegrated per second (Le., rate of disintegration of radioactive atoms) at any instant is directly proportional to the number of dN oc N or R =- dt radioactive atóms actually present in the sample at that instant, Le., =AN, dt where 2 is decay constant. Read the above passage and answer the following questions : (i) The count rate from a radioactive sample containing 1016 atoms is 4 x 10 per second. What is the value of decay constant ? (ii) Name the three types of radiactive radiations. Which one of them is most penetrating ?
Q. 4. Natural radioactivity is a spontaneous and self disruptive activity exhibited by a number of heavy elements in nature. Thus a heavy element disintegrates by itself without being forced by any external agent to do so. According to radioactive decay law, the number of atoms disintegrated per second (Le., rate of disintegration of radioactive atoms) at any instant is directly proportional to the number of dN oc N or R =- dt radioactive atóms actually present in the sample at that instant, Le., =AN, dt where 2 is decay constant. Read the above passage and answer the following questions : (i) The count rate from a radioactive sample containing 1016 atoms is 4 x 10 per second. What is the value of decay constant ? (ii) Name the three types of radiactive radiations. Which one of them is most penetrating ?
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter32: Medical Applications Of Nuclear Physics
Section: Chapter Questions
Problem 23PE: (a) Background radiation due to 226Ra averages only 0.01 mSv/y, but it can range upward depending on...
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