# Understanding the Level scheme of a nucleus from Nuclear Data Base

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Nuclear database shows observed nuclear electronic energy levels of $$O^{17}$$ having neutron separation energy 4143 keV. I want to find neutron $$s$$ energy levels ($$l=0$$ energy levels).

For this-

$$\Rightarrow l=0, s=1/2 \rightarrow J=1/2$$, and $$\pi= (-1)^l$$ Hence $$J^{\pi}=(1/2)^{+}$$ for $$l=0$$ levels. so as per above level scheme, there is one Level.

But the problem is $$J^{\pi}=(1/2)^{+}$$ can also come from Higher even $$l$$ values. In this scenario, Type of transition (E or M) helps.

The above figure says it is $$E2$$ Transition, from this can we know that $$(1/2)^{+}$$ belongs to $$l=0$$ state.

Can someone having expertise in nuclear energy level analysis help me?