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A laser ion source for on-line mass separation
Springer Science and Business Media LLC - Tập 74 - Trang 193-204 - 1992
P. Van Duppen, P. Dendooven, M. Huyse, L. Vermeeren, Z. N. Qamhieh, R. E. Silverans, E. Vandeweert
A laser ion source based on resonance photo ionization in a gas cell is proposed. The gas cell, filled with helium, consists of a target chamber in which the recoil products are stopped and neutralized, and an ionization chamber where the atoms of interest are selectively ionized by the laser light. The extraction of the ions from the ionization chamber through the exit hole and skimmer is similar...... hiện toàn bộ
Determination of Iron Oxidation State in Omphacites Applied to Geothermometry of Sudetic Eclogites
Springer Science and Business Media LLC - Tập 112 - Trang 223-226 - 1998
J. Galazka-Friedman, E.R. Bauminger, N. Bakun-Czubarow
A common mineral geothermometer for eclogites is based on Fe2+-Mg exchange reaction between garnets and clinopyroxenes. For the accurate determination of Fe2+ in omphacites, ten omphacite samples were isolated from eight Sudetic eclogites and studied by electron microprobe and Mössbauer spectroscopy. Garnet-clinopyroxene equilibration temperatures for two Sudetic eclogites were calculated.
Mössbauer investigation of Fe−Zr amorphous alloys hydrogenated after annealing
Springer Science and Business Media LLC - Tập 45 - Trang 277-286 - 1989
E. Kuzmann, A. Vértes, Y. Ujihira, M. Fujinami, P. Kovács, T. Ando, T. Masumoto
Transmission and conversion electron Mössbauer spectroscopy were used in order to get further information bout thé effect of hydrogenation in Fe89Zr11 amorphous alloys in connection with the observation that the magnetically split spectrum appearing at room temperature due to a moderate hydrogenation gradually collapses with increasing hydrogen content. The Mössbauer measurements were performed on...... hiện toàn bộ
Vibrational properties of the mononuclear Fe[HBpz3]2 spin crossover complex
Springer Science and Business Media LLC - Tập 243 - Trang 1-5 - 2022
Tim Hochdörffer, Juliusz A. Wolny, Andreas Omlor, Lena Scherthan, Hendrik Auerbach, Christina S. Müller, Hans-Christian Wille, Ilya Sergeev, Volker Schünemann
Within this work, we report the results of nuclear inelastic scattering experiments of the low-spin phase of the iron(II) mononuclear SCO complex Fe[HBpz3]2 and density functional theory based calculations performed on a model molecule of the complex. We show that the calculated partial density of vibrational states based on the structure of a single iron(II) center which is linked by three pyrazo...... hiện toàn bộ
Cluster phase transition in insulating spin glass Fe2TiO5
Springer Science and Business Media LLC - Tập 54 - Trang 717-722 - 1990
J. K. Srivastava, S. Morimoto, A. Ito
Mössbauer measurements, in conjunction with magnetisation and susceptibility studies, show that in Fe2TiO5, and other insulating spin glasses, spin freezing occurs via cluster formation where spin glass phase diagram transitions occur not for individual spins but for groups of correlated spins (clusters) whose effective spins' longitudinal and transverse (or vice versa) components successively fre...... hiện toàn bộ
Magnetic properties of nanocrystalline FeNiCo x ZrB alloys (x=0, 10, 20)
Springer Science and Business Media LLC - Tập 165 - Trang 183-188 - 2006
M. Kopcewicz, J. Kalinowska, T. Kulik
Magnetic properties of amorphous and nanocrystalline Fe31Ni50Zr7B12, Fe31Ni40Co10Zr7B12 and Fe31Ni30Co20Zr7B12 alloys were studied by an unconventional “rf-Mössbauer” technique. Introduction of Co atoms into FeNiZrB alloy leads to a large increase of anisotropy field that suppresses the rf collapse effect. The rf induced crystallization effect observed in Co-containing alloys was attributed to the...... hiện toàn bộ
Atom Trap Trace Analysis of Ca Isotopes
Springer Science and Business Media LLC - Tập 162 - Trang 167-172 - 2006
S. Hoekstra, A. K. Mollema, R. Morgenstern, L. Willmann, H. W. Wilschut, R. Hoekstra
In our experiment we aim at the detection of the rarest, naturally occuring calcium isotope $$^{41}$$ Ca by means of atom trap trace analysis. On basis of single-atom detection of $$^{46}$$ Ca our present sensiti...... hiện toàn bộ
Magnetic behaviour ofCuAuFe alloys
Springer Science and Business Media LLC - Tập 40 - Trang 385-388 - 1988
D. K. -H. Finkler, S. J. Campbell, G. H. J. Wantenaar, U. Gonser
The magnetic properties of Cu99-xAuxFe1 alloys (x=12, 37 and 50.7 ats) have been investigated over the temperature range ∼4.2–70 K using low field AC magnetic susceptibility measurements and mössbauer spectroscopy. All alloys exhibit spin glass behaviour at low temperature with freezing temperatures Tf∼-5.7–7.6 K. Results of analysis of the high temperature (T≳3 Tf) Curie-Weiss behaviour are compa...... hiện toàn bộ
A CEMS apparatus for in situ studies of ion beam modified metals
Springer Science and Business Media LLC - Tập 56 - Trang 1593-1597 - 1990
M. Hans, G. K. Wolf, F. E. Wagner
An apparatus for CEMS studies of ion beam modified metals is described. The spectrometer can be coupled directly to the ion implanter. During ion bombardement the sample can be cooled to liquid nitrogen temperature or heated to about 500 K. CEMS measurements can be taken directly after ion beam modification between room temperature and liquid nitrogen temperature. As a first test of the performanc...... hiện toàn bộ
Recent progress on neutron studies of YBa2Cu3O6+x
Springer Science and Business Media LLC - Tập 105 - Trang 3-12 - 1997
B. Keimer
A review is given of recent developments in inelastic neutron scattering experiments on the high temperature superconductor YBa_2Cu_3O_7 and its antiferromagnetic precursor YBa_2Cu_3O6.2. These include the detection of high energy “optical” spin waves and the determination of the full spin Hamiltonian in YBa_2Cu_3O6.2, a detailed study of the 40 meV magnetic resonance peak in the superconducting s...... hiện toàn bộ
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