Question

A sample of {^{233}_{92} U } \; (T_	frac{1}{2} = 1.59 x 10^5 yr ) contains 4.50 x 10^{18} nuclei. a) What is the decay constant? b) Approximately how many disintegrations will occur per minute?

Accepted Answer

a) 1.38 x 10^{-13} s ^{-1}  b) 3.73 x 10^7 disintigrations/min

A sample of ${^{233}_{92}\textrm{U}} \; (T_\tfrac{1}{2} = 1.59 \times 10^5 \textrm{ yr})$ contains $4.50 \times 10^{18}$ nuclei.

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A sample of 92233U (T12=1.59×105 yr){^{233}_{92}\textrm{U}} \; (T_\tfrac{1}{2} = 1.59 \times 10^5 \textrm{ yr})92233​U(T21​​=1.59×105 yr) contains 4.50×10184.50 \times 10^{18}4.50×1018 nuclei.

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A sample of ${^{233}_{92}\textrm{U}} \; (T_\tfrac{1}{2} = 1.59 \times 10^5 \textrm{ yr})$ contains $4.50 \times 10^{18}$ nuclei.