The isotope 241 95 Am is an alpha-particle emitter with a half-life of 432 years. (c) The activity of the 241 95 Am in a...
The isotope 241 95 Am is an alpha-particle emitter with a half-life of 432 years.
(c) The activity of the 241 95 Am in a smoke detector is 1 µCi. How long will it take for the activity to drop to 0.9 µCi?
(d) How many atoms of 241 95 Am have transmuted during the time for the activity to drop to 0.9 µCi?
(e) Calculate the Q value in MeV for this α−decay of 241 95 Am.
(f) Calculate the TOTAL energy released in both MeV and J, during the time the sample has decayed to 0.9 µCi.
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The isotope 241 95 Am is an alpha-particle emitter with a half-life of 432 years. (c) The activity of the 241 95 Am in a...
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of...
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 44.0 % of an Am-241 sample to decay?
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of...
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 32.0 % of an Am-241 sample to decay? Express your answer numerically in years.
1. Smoke detectors use Am-241, an alpha emitter, to detect smoke particles. A parent is concerned...
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Some smoke detectors (see the figure below) use the radiation produced by the decay of 241...
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Using the half-lives for 238U and 235U, the natural abundance of each isotope, and knowing the density of uranium metal is 19.2 g/cm3, calculate the total decay rate (disintegrations per second) of uranium atoms in a solid sphere, 10 cm in diameter. Both 238U and 235U decay by alpha emission. The alpha particle energies are approximately 4.3 MeV and 4.7 MeV, respectfully. There is additional energy released in photons (gammas) and subsequent decay of daughter products. Ignoring all that, using...
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