Shell model problem

by _Andreas
Tags: model, shell
_Andreas is offline
Apr3-07, 07:05 AM
P: 144
For a C-13 nucleus, the ground state is 1/2- (odd parity). In other words it is 1s(1/2)^2 1p(3/2)^4 1p(1/2)^1.

The next state is 1/2+. I'm a little confused here. My book seems to suggest that this state is written as 1s(1/2)^1 1p(3/2)^4 1p(1/2)^2, but it seems strange that the excited nucleon would be the one of the two in the lowest energy level. Isn't it the most tightly bound?
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