Unformatted text preview: . 03 Ã— 10 20 . (b) The decay rate is given by R = NÎ» = ( N ln 2) /T 1 / 2 , where Î» is the disintegration constant, T 1 / 2 is the halflife, and N is the number of nuclei. The relationship Î» = (ln 2) /T 1 / 2 is used. Thus, R = (2 . 03 Ã— 10 20 ) ln 2 (1600 y)(3 . 156 Ã— 10 7 s / y) = 2 . 79 Ã— 10 9 s âˆ’ 1 ....
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 Fall '08
 SPRUNGER
 Physics, Proton, Radioactive Decay, Mass, Isotope, Atomic nucleus, average mass number

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