Predicting Nuclear Parity & Spin: 14N, 20F, 24Na and 26Al

[leviathanX777]

1. Use the shell model to predict the nuclear parity and range of possible values for nuclear spin for 14N, 20F, 24Na and 26Al. Compare witht he actual parities and spin



2. J = Jn + Jp
pi = (-1)^l

The Attempt at a Solution

I've done out all of them, I got the theoretical values for parity on the wolfram alpha site. I got the first and last ones right. However for both the second and third I get a parity of 5+, yet they're suppose to be 2+ and 4+ respectively. Though I don't see how this is the case as the outer most shell is (1d5/2) in both which results in a J value of 5+ in each case. Is there something I'm missing because they all have odd-odd nuclei. But I don't see how it'd work for the first and last and not work for the other two. Also how do you calculate the spin?

 

[NateD]

I can't seem to find any information on that. 14N: J = 1/2+ , Parity: Negative (π=-1), Spin: 0.5 20F: J = 5/2+, Parity: Positive (π=+1), Spin: 2.5 24Na: J = 5/2+ , Parity: Positive (π=+1), Spin: 2.5 26Al: J = 5/2+, Parity: Positive (π=+1), Spin: 2.5