The transient magnetic field for13C in iron

The time-integral transient-field precession has been measured for the first 5+/2 state in¹³C recoiling in magnetized iron at initial velocities ofv_i/v_o=3.4, 5.9, and 8.8. The results are consistent with recent findings for the extremely short-lived (=0.06 ps) 2₁⁺ state of¹²C. The transient magnetic field is found to exhibit a maximum of 4 MG at a velocity around 4v_o, supporting an interpretation originating in the polarization of halfempty s-shells of the recoiling carbon ions. Closed polycrystalline iron frames were used as ferromagnetic backings, and their properties as such are discussed.