Q55 · CSIR NET Chemistry, December 2012
Paper: CSIR NET December 2012 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Marks: 2 · Difficulty: Medium
The recoil energy of a Mossabauer nuclide of mass 139 amu is 2.5 MeV. The energy emitted by the nucleus in keV is:
(a)12.5
(b)15.0
(c)20.5
(d)25.0
Answer
Answer: D ✓ checked by 4AB · confidence medium
Explanation
E_γ = √(2Mc²E_R) = √(2 × 139 × 931.5 MeV × 2.5 meV) ≈ 25 keV (d).
Study loop for Inorganic Spectroscopy