In the nuclear decay given below
`._Z^A X rarr ._(Z-1).^A Y rarr ._(Z-1)^(A - 4) B^** rarr ._(Z-1)^(A-1) B`,
the particle emitted in the sequence are

Options

A. `gamma, beta, alpha`
B. `beta, gamma, alpha`
C. `alpha, beta, gamma`
D. `beta, alpha, gamma `

Answer

D

Explanation

`"" _(Z) ^(A) X overset (beta ^(-))toA+1 TY _(1) overset (alpha)to "" _(z-1) ^(A-4) B^(**) overset(gamma)to ""_(z -1) ^(A -4)B`
Find X decays be `beta ^(-1)` emission emitting `baru,` antineutrion simultaneously. Y emist `alpha ` resulting in the excited level of B which in turn emits a `gamma` ray. `
`therefore beta ^(-), alpha, gamma` is the answer.