“…With this spin arising from a n(2p2y2)^^1fgy2)^(2Pi/2)* configuration, the parity would be negative. The 9/2 isomeric level in Y at IteV is known to have an M4 transition to the ground state (62,63). A second forbidden beta transition between the ®^Sr ground state and the 9/2* state in has been observed (43,44), which is consistent with a 5/2* assignment to the ®^Sr ground state.…”