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  • (a) Define one Becquerel. (b) A radioactive substance disintegrates into two types of daughter nuclei, one type with disintegration constant and the o

(a) Define one Becquerel.

(b) A radioactive substance disintegrates into two types of daughter nuclei, one type with disintegration constant \lambda_{1} and the other type with disintegration constant \lambda_{2} . Determine the half-life of the radioactive substance.

 

 

Answers (1)

a)

1\ Becquerel=\frac{1\ disintegration}{1\ second}

b) 

\\R=-(\lambda_1+\lambda_2)N\\R=-\lambda N\\therefore\\\lambda=\lambda_1+\lambda_2\\T_{1/2}=\frac{0.693}{\lambda_1+\lambda_2}

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