Publications (14)
Photorecombination of berylliumlike Ti18+: Hyperfine quenching of dielectronic resonances
S. Schippers, E. W. Schmidt, D. Bernhardt +7
The photorecombination spectrum of 48Ti18+ was measured employing the merged electron-ion beams technique at a heavy-ion storage ring. The experimental electron-ion collision energ…
Absolute rate coefficients for photorecombination of berylliumlike and boronlike silicon ions
D. Bernhardt, A. Becker, C. Brandau +11
We report measured rate coefficients for electron-ion recombination for Si10+ forming Si9+ and for Si9+ forming Si8+, respectively. The measurements were performed using the electr…
Electron-ion Recombination of Fe XII forming Fe XI: Laboratory Measurements and Theoretical Calculations
O. Novotný, N. R. Badnell, D. Bernhardt +9
We have measured electron-ion recombination for Fe XII forming Fe XI using a merged beams configuration at the heavy-ion storage ring TSR located at the Max Planck Institute for Nu…
Storage-ring measurement of the hyperfine induced 47Ti18+(2s 2p 3P0 -> 2s2 1S0) transition rate
S. Schippers, E. W. Schmidt, D. Bernhardt +7
The hyperfine induced 2s 2p 3P0 > 2s2 1S0 transition rate AHFI in berylliumlike 47Ti18+ was measured. Resonant electron-ion recombination in a heavy-ion storage ring was employed t…
Storage Ring Cross Section Measurements for Electron Impact Ionization of Fe 7+
M. Hahn, A. Becker, D. Bernhardt +10
We have measured electron impact ionization (EII) for Fe 7+ from the ionization threshold up to 1200 eV. The measurements were performed using the TSR heavy ion storage ring. The i…
Storage Ring Cross Section Measurements for Electron Impact Single and Double Ionization of Fe^13+ and Single Ionization of Fe^16+ and Fe^17+
M. Hahn, A. Becker, D. Bernhardt +10
We report measurements of electron impact ionization (EII) for Fe^13+, Fe^16+, and Fe^17+ over collision energies from below threshold to above 3000 eV. The ions were recirculated…
Storage Ring Cross Section Measurements for Electron Impact Ionization of Fe^11+ Forming Fe^12+ and Fe^13+
M. Hahn, D. Bernhardt, M. Grieser +8
We report ionization cross section measurements for electron impact single ionization (EISI) of Fe^11+$ forming Fe^12+ and electron impact double ionization (EIDI) of Fe^11+ formin…
Electron-ion Recombination of Fe X forming Fe IX and of Fe XI forming Fe X: Laboratory Measurements and Theoretical Calculations
M. Lestinsky, N. R. Badnell, D. Bernhardt +12
We have measured electron-ion recombination for Fe forming Fe and for Fe forming Fe using merged beams at the TSR heavy-ion storage-ring in Heidelberg.…
Absolute rate coefficients for photorecombination and electron-impact ionization of magnesium-like iron ions from measurements at a heavy-ion storage ring
D. Bernhardt, A. Becker, M. Grieser +10
Rate coefficients for photorecombination (PR) and cross sections for electron-impact ionization (EII) of Fe forming Fe and Fe, respectively, have been measu…
Storage-ring measurement of the hyperfine-induced 2s 2p 3P0 -> 2s2 1S0 transition rate in beryllium-like sulfur
S. Schippers, D. Bernhardt, A. Müller +8
The hyperfine induced 2s 2p 3P0 -> 2s2 1S0 transition rate in Be-like sulfur was measured by monitoring the decay of isotopically pure beams of 32-S12+ and 33-S12+ ions in a heavy-…
Electron-ion recombination of Si IV forming Si III: Storage-ring measurement and multiconfiguration Dirac-Fock calculations
E. W. Schmidt, D. Bernhardt, A. Mueller +10
The electron-ion recombination rate coefficient for Si IV forming Si III was measured at the heavy-ion storage-ring TSR. The experimental electron-ion collision energy range of 0-1…
Isotope shift in the dielectronic recombination of three-electron ^{A}Nd^{57+}
C. Brandau, C. Kozhuharov, Z. Harman +25
Isotope shifts in dielectronic recombination spectra were studied for Li-like ^{A}Nd^{57+} ions with A=142 and A=150. From the displacement of resonance positions energy shifts δE…
Recombination of W18+ ions with electrons: Absolute rate coefficients from a storage-ring experiment and from theoretical calculations
K. Spruck, N. R. Badnell, C. Krantz +10
We present new experimentally measured and theoretically calculated rate coefficients for the electron-ion recombination of W([Kr] ) forming W. A…
Dielectronic recombination of xenonlike tungsten ions
S. Schippers, D. Bernhardt, A. Müller +8
Dielectronic recombination (DR) of xenonlike W20+ forming W19+ has been studied experimentally at a heavy-ion storage-ring. A merged-beams method has been employed for obtaining ab…