Saturation factor in neutron activation analysis is (A= induced radioactivity, = neutron flux, sigma = effective nuclear cross section, N = no. of target atoms, lambda = decay constant)

ABC26PH0220 · Surface Chemistry

Subject: Physical Chemistry · Chapter: Surface Chemistry · Topic: Surface Chemistry – General · Exam: CSIR-NET DEC 2016 · Marks: 2 · Difficulty: Medium

Saturation factor in neutron activation analysis is ($A=$ induced radioactivity, $\psi=$ neutron flux, $\sigma=$ effective nuclear cross section, N = no. of target atoms, $\lambda=$ decay constant)

(a)$\dfrac{A}{\psi\sigma N}$

(b)$\frac{\psi \sigma N A}{\lambda}$

(c)$\frac{\lambda}{A \psi \sigma N}$

(d)$\frac{\psi \sigma N}{A}$

Answer

Answer (as printed): A

Explanation

Activity equation: $A=N\sigma\psi\left[1-e^{-\lambda t}\right]$. $1-e^{-\lambda t}=$ Saturation factor $S$. Saturation factor $S=\dfrac{A}{\psi\sigma N}$.

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