Q75 · CSIR-NET Chemistry, December 2019

Paper: CSIR-NET December 2019 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Mossbauer · Marks: 2 · Difficulty: Medium

In Mossbauer spectrum of a sample containing iron recorded in the presence of a static magnetic field, the number of possible allowed transition(s) is
(a)Two
(b)Four
(c)Six
(d)Eight
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
A magnetic field splits the I = 3/2 excited state into four and the I = ½ ground state into two levels; with Δm_I = 0, ±1 there are six allowed transitions — the six-line pattern.

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