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Compute the specific power of tritium. (b) Calculate the activity lin Bąj of trititum needed to supply 25 W of electric power to a tablet computer if the thermal-to-electric energy conversion efficien...

Compute the specific power of tritium. (b) Calculate the activity lin Bąj of trititum needed to supply 25 W of electric power to a tablet computer if the thermal-to-electric energy conversion efficiency is 4% of tritium

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Answer #1

Required power is 25W.

Conversion efficiency is 4%, therefore, before converting into electrical energy, the required power is (25/4) x 100 W = 625 W.

The power in milliwatts emitted by one curie of radiation can be calculated by taking the number of MeV (17.6 MeV) for the radiation times approximately 5.93.

Therefore, 1 curie is capable of producing 17.6 x 5.93 mW.

For 625W, we need 625/(17.6 x 5.93m) curie of radiation.

1 curie / gram = 37 x 109 becquerels / gram.

Therefore, required activity is (625 x 37 x 109)/(17.6 x 5.93m) = 221.57 x 1012 Bq/g

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