GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3/4th of it will disintegrate in two months.
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it will completely disintegrate in four months.
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it will completely disintegrate in two months.
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l/8th of it will remain intact at the end of four months.
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Detailed explanation-1: -Explanation: The half-life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half-life period of a radioactive substance is one month, then it will completely disintegrate in two months.
Detailed explanation-2: -The theoretical half-life of Ba-137m is approximately 2.56 minutes, and the result from the experiment is 2.6 minutes. In summary, a radioisotope generator containing Cs-137 produces Ba-137m, which is extracted in a solution. The Ba-137m has a half-life of about 2.6 minutes as measured during this research.
Detailed explanation-3: -In the absence of eadioactive substance A, it counts 3 disintegration per second (dps). At the start in the presence of A, it records 23 dps; and after 10 min 13 dps.