The g-factor ratio of the first excited 3-and 5-states in 4~ was measured to be g3/g5 = 1.01(10) employing the implantation perturbed angular correlation technique.The static hyperfine fields (SF) in Fe and Gd hosts were used. In addition the lifetime of the 5-state was measured to be z=426 (7)ps. The values of the SF in Gd and Fe hosts were deduced and compared with systematics in this element region.