Check eq (32 4) by estimating the radioactive heat production rate using data from Table 20 6 Take the fractional abundances of 235 U, 40 K to be 0 72 , 0 012 Take the average energy release in 40 K decay to be 0 71MeV O 98CU 26 5CTH 0 0035Ck W kg Half life (y) Initial decay Average Subsequent deca...

The power emitted by N j atoms of a radioactive isotope j with halflife t ...

Check eq. (32.4) by estimating the radioactive heat production rate using data from Table 20.6 Take the

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Check eq. (32.4)

O = 98CU + 26.5CTH + 0.0035Ck[µW/kg]

by estimating the radioactive heat production rate using data from Table 20.6

Half-life (y) Initial decay Average Subsequent decay chain Nuclide Crustal abundance (C) energy 238 U → 206 Ph + 8 a +

Take the fractional abundances of ²³⁵U, ⁴⁰K to be 0.72%, 0.012%. Take the average energy release in ⁴⁰K decay to be 0.71MeV.

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The Physics of Energy

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Authors: Robert L. Jaffe, Washington Taylor

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