Recombination of Free Electrons with Ions

Müller, A.; Schennach, S.; Wagner, M.; Haselbauer, J.; Uwira, O.; Spies, W.; Jennewein, E.; Becker, R.; Kleinod, M.; Pröbstel, U.; Angert, N.; Klabunde, J.; Mokler, P. H.; Spädtke, P.; Wolf, Bram

doi:10.1088/0031-8949/1991/t37/011

Cited by 55 publications

(9 citation statements)

References 6 publications

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“…Similar differences were also found for Au 501 and Au 491 [12], where also recombination spectra were recorded. Although enhanced recombination rates have been detected in several storage ring experiments during the last years [13][14][15] it has never been possible to detect an isolated resonance as close to threshold and to measure such a high recombination rate as here.…”

Section: (Received 22 December 2000)mentioning

confidence: 78%

QED Effects in Cu-Like Pb Recombination Resonances Near Threshold

et al. 2001

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In an electron-ion recombination study with Pb53+ dielectronic recombination resonances are found for as low as approximately 10(-3)-10(-4) eV relative energy. The resonances have been calculated by relativistic many-body perturbation theory and through comparison with experiment the Pb53+(4p(1/2)-4s(1/2)) energy splitting of approximately 118 eV is determined with an accuracy comparable to the position of the first few resonances, i.e., approximately 10(-3) eV. Such a precision provides a test of QED in a many-body environment at a level which can still not be reached in calculations.

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Section: (Received 22 December 2000)mentioning

confidence: 78%

QED Effects in Cu-Like Pb Recombination Resonances Near Threshold

et al. 2001

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“…Early recombination experiments in this energy range with U 281 produced recombination rates exceeding theoretical predictions for RR by a factor of 200 [2]. Measurements on Au 501 [3] and Pb 531 [4] yielded similar effects.…”

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confidence: 73%

Influence of Magnetic Fields on Electron-Ion Recombination at Very Low Energies

et al. 2000

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Radiative recombination (inverse photoionization) is believed to be well understood since the beginning of quantum mechanics. Still, modern experiments consistently reveal excess recombination rates at very low electron-ion center-of-mass energies. In a detailed study on recombination of F6+ and C6+ ions with magnetically guided electrons we explored the yet unexplained rate enhancement, its dependence on the magnetic field B, the electron density n(e), and the beam temperatures T( perpendicular) and T( ||). The excess scales as T(-1/2)( perpendicular) and, surprisingly, as T(-1/2)( ||), increases strongly with B, and is insensitive to n(e). This puts strong constraints on explanations of the enhancement.

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“…The phenomenon of excessive recombination rates observed for multi-electron ions was discovered [95] in recombination studies employing a single-pass merged-beam setup at the UNILAC accelerator of the GSI Heavy-Ion Research center in Darmstadt, Germany. For U 28+ [96,97] and even up to 1.2 × 10 −6 cm 3 s −1 , respectively, were measured at relative energies below 0.1 meV, respectively.…”

Section: Electron-ion Recombinationmentioning

confidence: 99%

Fusion-Related Ionization and Recombination Data for Tungsten Ions in Low to Moderately High Charge States

Müller

2015

Atoms

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Collisional processes and details of atomic structure of heavy many-electron atoms and ions are not yet understood in a fully satisfying manner. Experimental studies are required for guiding new theoretical approaches. In response to fusion-related needs for collisional and spectroscopic data on tungsten atoms in all charge states, a project has been initiated in which electron-impact and photon-induced ionization as well as photorecombination of W q+ ions are studied. Cross sections and rate coefficients were determined for charge states q ranging from q = 1 to q = 5 for photoionization, for q = 1 up to q = 19 for electron-impact ionization and for q = 18 to q = 21 for electron-ion recombination. An overview, together with a critical assessment of the methods and results is provided.

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Recombination of Free Electrons with Ions

Cited by 55 publications

References 6 publications

QED Effects in Cu-Like Pb Recombination Resonances Near Threshold

QED Effects in Cu-Like Pb Recombination Resonances Near Threshold

Influence of Magnetic Fields on Electron-Ion Recombination at Very Low Energies

Fusion-Related Ionization and Recombination Data for Tungsten Ions in Low to Moderately High Charge States

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