Question

Isomer shift

21 Jan 2026
Answer :
Word Count : 284
Isomer shift, also known as chemical shift in Mössbauer spectroscopy, arises due to the difference in the electron density at the nucleus between the source and the absorber of gamma rays. This shift occurs because the energy of nuclear gamma-ray transitions is influenced by the s-electron density surrounding the nucleus. When a nucleus is embedded in an electron cloud, the electrostatic interaction between the nuclear charge and the electron density slightly
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