Atomic level energy and the scale of electromagnetic waves

6 Atomic level energy and the scale of electromagnetic waves 

When a nucleus undergoes transformation from an excited to a ground state, a y-quan-tum is anitted, the frequency of which is co= (Ey2 E For stripped nucleus, we denote this frequency as coq- 

The next step is an account of quadrupole interaction (eq. 8.2.8) provided the nucleus possesses a quadrupole moment and is in a nonuniform electric field. If both these conditions are fulfilled, the energy levels split according to eq. (8.2.8) (see Section 8.2.4). When quantum number present in this expression is in square, the top level splits into two sub-levels mj = 9/4 and 1/4) and the lower level does not split at all (mj = 1/4). Therefore, one existing spectral line splits in two. The experimental evaluations show that the usual value of quadrupole splitting is about 10 eV. 

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