Question

There are two radio nuclei A and B. A is an alpha emitter and B a beta emitter. Their disintegration constants are in the ratio of 1 : 2. What should be the ratio of number of atoms of A and B at any time t so that probabilities of getting alpha and beta particles are same at that instant –

• A. 2 : 1
• B. 1 : 2
• C. e
• D. 1/e

Answer 1

Answer: (A)

2 : 1

Answer 2

= $\frac { 1 } { 2 }$ Probability of getting ‘a’ and ‘b’ particles are same. Thus rate of disintegration are equal l_AN_A = l_BN_B

= = 2