g factors have been measured for the first 2+ states of 58,60,62,64Ni isotopes employing the comb... more g factors have been measured for the first 2+ states of 58,60,62,64Ni isotopes employing the combined technique of projectile Coulomb excitation and transient magnetic fields. Lifetimes of low-lying states were redetermined using the Doppler shift attenuation method technique. The same target has been used in all measurements and the isotopes were provided by the ion source of the accelerator. These
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1995
ABSTRACT Implantation of 80 keV 40Ar ions into 0.5 mg/cm2 thick Fe layers, deposited by vacuum ev... more ABSTRACT Implantation of 80 keV 40Ar ions into 0.5 mg/cm2 thick Fe layers, deposited by vacuum evaporation onto a Gd foil, yielded an Ar target of 35(6) μg/cm2 thickness which is suitable for in-beam γ-spectroscopy. Thin Fe-layer evaporation and implantation were successively applied in several cycles whereby the Ar implantation always occurred into a newly prepared Fe layer. These procedures can principally be extended for obtaining even larger thicknesses. The Ar content of the target and its layer thickness were accurately determined by the Elastic Recoil Detection Analysis technique using a 58Ni beam.
... b , A Linnemann a , AF Lisetskiy a , N Pietralla a , HH Pitz b , M Scheck b , K.-H Speidel d ... more ... b , A Linnemann a , AF Lisetskiy a , N Pietralla a , HH Pitz b , M Scheck b , K.-H Speidel d , F Stedile b and SW Yates c. ... We used the surface delta interaction (SDI) [27] and the code Ritsschil [28], for which a new graphical interface Rits-Tk was developed by H. Klein in Cologne. ...
Large transient magnetic fields have been observed for single-electron O ions for short interacti... more Large transient magnetic fields have been observed for single-electron O ions for short interaction times of 10 fs and 100 fs passing through thin magnetized Gd layers. The derived value for the degree of polarization, p1s=0.26(1), demonstrates that the polarization transfer cross sections are large enough to generate in very short times substantial polarization of 1s electrons in these ions.
In time-differential measurements it is shown that 1s electrons of single-electron 16O(3-) ions h... more In time-differential measurements it is shown that 1s electrons of single-electron 16O(3-) ions have their spin polarized on emergence from magnetized thin Fe foils into vacuum. The mean degree of polarization deduced, p1s=0.060(6), is approximately half of what is observed inside the Fe foil.
Spin polarization of 1s electrons has been observed for single-electron F ions on emergence from ... more Spin polarization of 1s electrons has been observed for single-electron F ions on emergence from magnetized thin Fe layers into vacuum by use of the perturbed-angular-correlation technique on the isomeric 19F(5/2+) state as probe. The mean degree of polarization observed, p1s=0.10(3), is consistent with values relevant to measurements of transient magnetic fields.
We have remeasured and have redetermined the g factor for the 4{sup +} state in Zn following inco... more We have remeasured and have redetermined the g factor for the 4{sup +} state in Zn following inconsistencies between earlier measurements and a recent result. We have reanalyzed several former measurements by applying an alternative analysis procedure, which allows for determining the precession effect separately for each gamma detector implying less uncertainties in the background subtraction for the relevant spectra. In addition, all measured g-factor and B(E2) data for the first 2{sup +} and 4{sup +} states in all stable even-A Zn isotopes and the radioactive ²Zn, are compared with new large-scale shell model calculations based on the most advanced effective interaction in the fpg-shell model space.
The g factors of the 2+1 and 4+1 states in 78,80,82,84,86Kr have been measured for the first time... more The g factors of the 2+1 and 4+1 states in 78,80,82,84,86Kr have been measured for the first time, using Coulomb excitation of isotopic Kr beams and the transient field technique. The measured g factors of 2+1 states in 78,80,82Kr are well described, in both magnitude and progression with neutron number, by the IBA-II model. Whereas the lighter isotopes show a
Projectile excitation and the transient field technique have been used to measure the g factors o... more Projectile excitation and the transient field technique have been used to measure the g factors of the 2 1 + , 2 2 + , and 4 1 + states in 7482 Se in order to study the influence of the N=50 shell closure at low excitation energies. The states of interest were populated by Coulomb ...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1996
Heavy ion beams induce by their stopping power severe demagnetizations of ferromagnetic materials... more Heavy ion beams induce by their stopping power severe demagnetizations of ferromagnetic materials of dynamic nature. This perturbation of ferromagnetism causes substantial attenuations of transient magnetic fields on traversing probe ions. A striking stopping power dependence has been found when the probe ions are in the H-like charge state. Due to the uncorrelated behaviour of beam ions and probe ions,
g factors have been measured for the first 2+ states of 58,60,62,64Ni isotopes employing the comb... more g factors have been measured for the first 2+ states of 58,60,62,64Ni isotopes employing the combined technique of projectile Coulomb excitation and transient magnetic fields. Lifetimes of low-lying states were redetermined using the Doppler shift attenuation method technique. The same target has been used in all measurements and the isotopes were provided by the ion source of the accelerator. These
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1995
ABSTRACT Implantation of 80 keV 40Ar ions into 0.5 mg/cm2 thick Fe layers, deposited by vacuum ev... more ABSTRACT Implantation of 80 keV 40Ar ions into 0.5 mg/cm2 thick Fe layers, deposited by vacuum evaporation onto a Gd foil, yielded an Ar target of 35(6) μg/cm2 thickness which is suitable for in-beam γ-spectroscopy. Thin Fe-layer evaporation and implantation were successively applied in several cycles whereby the Ar implantation always occurred into a newly prepared Fe layer. These procedures can principally be extended for obtaining even larger thicknesses. The Ar content of the target and its layer thickness were accurately determined by the Elastic Recoil Detection Analysis technique using a 58Ni beam.
... b , A Linnemann a , AF Lisetskiy a , N Pietralla a , HH Pitz b , M Scheck b , K.-H Speidel d ... more ... b , A Linnemann a , AF Lisetskiy a , N Pietralla a , HH Pitz b , M Scheck b , K.-H Speidel d , F Stedile b and SW Yates c. ... We used the surface delta interaction (SDI) [27] and the code Ritsschil [28], for which a new graphical interface Rits-Tk was developed by H. Klein in Cologne. ...
Large transient magnetic fields have been observed for single-electron O ions for short interacti... more Large transient magnetic fields have been observed for single-electron O ions for short interaction times of 10 fs and 100 fs passing through thin magnetized Gd layers. The derived value for the degree of polarization, p1s=0.26(1), demonstrates that the polarization transfer cross sections are large enough to generate in very short times substantial polarization of 1s electrons in these ions.
In time-differential measurements it is shown that 1s electrons of single-electron 16O(3-) ions h... more In time-differential measurements it is shown that 1s electrons of single-electron 16O(3-) ions have their spin polarized on emergence from magnetized thin Fe foils into vacuum. The mean degree of polarization deduced, p1s=0.060(6), is approximately half of what is observed inside the Fe foil.
Spin polarization of 1s electrons has been observed for single-electron F ions on emergence from ... more Spin polarization of 1s electrons has been observed for single-electron F ions on emergence from magnetized thin Fe layers into vacuum by use of the perturbed-angular-correlation technique on the isomeric 19F(5/2+) state as probe. The mean degree of polarization observed, p1s=0.10(3), is consistent with values relevant to measurements of transient magnetic fields.
We have remeasured and have redetermined the g factor for the 4{sup +} state in Zn following inco... more We have remeasured and have redetermined the g factor for the 4{sup +} state in Zn following inconsistencies between earlier measurements and a recent result. We have reanalyzed several former measurements by applying an alternative analysis procedure, which allows for determining the precession effect separately for each gamma detector implying less uncertainties in the background subtraction for the relevant spectra. In addition, all measured g-factor and B(E2) data for the first 2{sup +} and 4{sup +} states in all stable even-A Zn isotopes and the radioactive ²Zn, are compared with new large-scale shell model calculations based on the most advanced effective interaction in the fpg-shell model space.
The g factors of the 2+1 and 4+1 states in 78,80,82,84,86Kr have been measured for the first time... more The g factors of the 2+1 and 4+1 states in 78,80,82,84,86Kr have been measured for the first time, using Coulomb excitation of isotopic Kr beams and the transient field technique. The measured g factors of 2+1 states in 78,80,82Kr are well described, in both magnitude and progression with neutron number, by the IBA-II model. Whereas the lighter isotopes show a
Projectile excitation and the transient field technique have been used to measure the g factors o... more Projectile excitation and the transient field technique have been used to measure the g factors of the 2 1 + , 2 2 + , and 4 1 + states in 7482 Se in order to study the influence of the N=50 shell closure at low excitation energies. The states of interest were populated by Coulomb ...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1996
Heavy ion beams induce by their stopping power severe demagnetizations of ferromagnetic materials... more Heavy ion beams induce by their stopping power severe demagnetizations of ferromagnetic materials of dynamic nature. This perturbation of ferromagnetism causes substantial attenuations of transient magnetic fields on traversing probe ions. A striking stopping power dependence has been found when the probe ions are in the H-like charge state. Due to the uncorrelated behaviour of beam ions and probe ions,
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