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| 3. |
- Böhm, S, et al.
(author)
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Enhancement of dielectronic recombination by external electromagnetic fields
- 2003
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In: Hyperfine Interactions. - 0304-3843. ; 146-147:1-4, s. 23-27
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Journal article (peer-reviewed)abstract
- The enhancement of the dielectronic recombination rate of lithiumlike Ne7+ and O5+ ions by external electromagnetic fields has been measured at the storage ring CRYRING. The energy range covered all 1s(2)2pnl dielectronic recombination resonances attached to the 2s --> 2p core excitation. Electric fields up to 1436 V/cm were applied in the Ne7+ experiment and the saturation of the enhancement with increasing electric field could clearly be seen. In the O5+ experiment the enhancement was studied as a function of the Rydberg quantum number n.
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| 4. |
- Eklöw, N, et al.
(author)
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Magnetic-field dependence in electron-deuteron recombination at very low relative energy
- 2000
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In: Hyperfine Interactions. - 0304-3843 .- 1572-9540. ; 127:1-4, s. 251-255
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Journal article (peer-reviewed)abstract
- The rate coefficient for recombination of D+ with low-energy electrons has been measured at different magnetic fields in the interaction region of the electron cooler at CRYRING. It is found that the measured recombination rate coefficient is influenced by the magnetic field.
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| 5. |
- Eneroth, Erik, et al.
(author)
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Fe-hydroxysulphates from bacterial Fe2+ oxidation
- 2004
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In: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) (Hyperfine Interactions). - 0304-3843 .- 1572-9540. ; 156-57:1-4, s. 423-429
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Conference paper (peer-reviewed)abstract
- Precipitates formed due to Fe(II)-oxidation catalysed by Acidithiobacillus ferrooxidans between pH 1.6 and 3.2 have been studied by powder X-ray diffraction, infrared spectroscopy and Mossbauer spectroscopy. The precipitates consist of well crystalline, ammonium-containing jarosite at pH 1.6, and mixtures of jarosite and poorly crystalline schwertmannite at pH 2.5 and 3.2. At low temperatures ( 10 and 20 K) the components of the two phases overlap strongly. Jarosites ordered (c. 45 K - defect antiferromagnetic) at temperatures well below the ordering temperature for schwertmannite (c. 80 K at pH 3.2 and c. 70 K at pH 2.5). Thus thermoscans measured between 100 and 10 K facilitates characterization of these two minerals when occurring in mixtures.
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| 6. |
- Ericsson, Tore, et al.
(author)
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Non-magnetic stainless steels reinvestigated : A small effective field component in external magnetic fields
- 2004
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In: Hyperfine Interactions. - 0304-3843 .- 1572-9540. ; 156/157, s. 151-155
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Journal article (peer-reviewed)abstract
- Three standard non-magnetic stainl ess steels of composition (wt%) Fe 70 Cr 19 Ni 11 , Fe 70 Cr 17 Ni 13 and Fe 69 Cr 18 . 5 Ni 10 . 3 Mn 1 . 8 Ti 0 . 4 have been investigated by Mössbauer spectroscopy (5–295 K and in external fields 7 T at room temperature) and ma gnetization measurements (10– 300 K) using a SQUID magnetometer. There are indications of a field induced ferromagnetic inter- action in the samples at room temperature
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| 7. |
- Habs, D., et al.
(author)
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The REX-ISOLDE project
- 2000
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In: Hyperfine Interactions. - 0304-3843 .- 1572-9540. ; 129:1-4, s. 43-66
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Journal article (peer-reviewed)abstract
- The Radioactive Beam Experiment REX-ISOLDE [1-3] is a pilot experiment at ISOLDE (CERN) testing the new concept of post acceleration of radioactive ion beams by using charge breeding of the ions in a high charge state ion source and the efficient acceleration of the highly charged ions in a short LINAC using modern ion accelerator structures. In order to prepare the ions for the experiments singly charged radioactive ions from the on-line mass separator ISOLDE will be cooled and bunched in a Penning trap, charge bred in an electron beam ion source (EBIS) and finally accelerated in the LINAC. The LINAC consists of a radiofrequency quadrupole (RFQ) accelerator, which accelerates the ions up to 0.3 MeV/u, an interdigital H-type (IH) structure with a final energy between 1.1 and 1.2 MeV/u and three seven gap resonators, which allow the variation of the final energy. With an energy of the radioactive beams between 0.8 MeV/u and 2.2 MeV/u a wide range of experiments in the field of nuclear spectroscopy, astrophysics and solid state physics will be addressed by REX-ISOLDE.
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| 8. |
- Hoff, P, et al.
(author)
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Nuclear spectroscopy at Sn-133
- 2000
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In: HYPERFINE INTERACTIONS. - : BALTZER SCI PUBL BV. - 0304-3843. ; 129:1-4, s. 141-148
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Journal article (other academic/artistic)abstract
- It is described how the measurement of n gamma -coincidences can be used to identify single-particle states in Sn-133. This method, in combination with the improved yields at ISOLDE, has facilitated firm determination of three excited single-particle stat
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| 9. |
- Huyse, M., et al.
(author)
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Anomalies in the alpha-decay energies and half-lives of neutron-deficient Po isotopes
- 2001
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In: Hyperfine Interactions. - 0304-3843 .- 1572-9540. ; 132:04-jan, s. 141-146
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Journal article (peer-reviewed)abstract
- The transition rates of DeltaL = 0 alpha transitions in them lightest Po isotopes are considerably slower than the transition rates of the heavier ones, even leading to a considerable deviation in the classical Geiger-Nuttall plot. Evidence will be given that due to particle-hole excitations through the Z = 82 proton shell, the groundstate of the lighter Po isotopes becomes deformed and direct alpha decay to the spherical groundstate of the corresponding Ph isotopes is highly retarded.
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