Evidence for electron orbital dependence of ion-beam induced attenuations of transient magnetic fields

In-beam magnetization measurements of thin Fe foils and simultaneous observation of the transient magnetic field at Pd ions

“…Beams used for the different measurements are marked at the data points Applying in addition the assignment of the electron orbitals predominantly involved in the TF to the present data, the attenuation for Pd ions at their mean velocity of 5.6Vo corresponds to 3 s-electrons as for 62Ni. This result gives further support to the electron orbital dependence of TF attenuation induced by heavy ion beams as found in recent work [5].…”

New determination of the magnetic moment of the54Fe(2 1 + ) state at 1.408 MeV

“…The difference in the attenuations between 56Fe and 2SSi is attributed to the dependence on the specific electron orbitals determining the TF strength at the given ion velocities. Evidence for this feature has been found for the first time recently in specific measurements for equal ions [ 17]. For 56Fe mainly the outer 3s-electrons contribute to the TF whereas for 28Si it is dominated by Is-electrons.…”

On the ion beam stopping power dependence of transient magnetic fields in Fe- and Gd-hosts

“…Moreover, a striking difference in the attenuation is observed depending on the ionization state of the probe ions whereby the largest attenuations are found for Iselectron ions. This electron orbital dependence [14] of the ion-beam induced attenuations could also be an artefact in the sense that (2) (which has been used for the quantification of the attenuation) is not an overall adequate description of TF data bearing in mind that higher electron orbitals refer to lower ion velocities and the degree of polarization might be different as well. An orbital dependence of the degree of polarization was found only recently in measurements on 160-ions for which the 2s-electron polarization turned out to be twice as large as for the is-electrons [15,16].…”

“…All targets were cooled to liquid nitrogen temperature which was essential for the magnetization of Gd, but also for the Fe targets it was considered as beneficial to exclude any beam heating effects. External fields of 0.05 T were applied for their magnetization which were found to be sufficient for magnetic saturation [14,18].…”

“…An orbital dependence of the degree of polarization was found only recently in measurements on 160-ions for which the 2s-electron polarization turned out to be twice as large as for the is-electrons [15,16]. It should be noted that the electron orbital dependence of the attenuations was earlier discussed in just this context [14].…”