Equilibrium Charge Distributions of Boron in Carbon

Bickel, William S.; Oona, H.; Smith, WE; Martinson, I.

doi:10.1088/0031-8949/6/1/009

Cited by 14 publications

(5 citation statements)

References 5 publications

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“…The ions were directed through a thin carbon foil of a prescribed thickness that ranged from 2.1 to 2.4 lg/cm2. In this energy range about 55% of the ions after the foil are singly-charged [20]. The energy loss of the ions in the foil was typically 5 keV, while the relative velocity uncertainty of the ions after the foil was estimated to be 1.5%.…”

Section: Methodsmentioning

confidence: 99%

Lifetimes of Doubly-Excited 2p3lLevels in Singly Ionized Boron, B II

et al. 1998

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Lifetimes of several 2p3s, 2p3p and 2p3d levels in singly ionized boron, B II, have been determined by means of beamÈfoil spectroscopy and theoretical calculations, using the superposition-of-conÐgurations (SOC) program of Cowan. These doubly-excited terms which lie close to the Ðrst ionization limit of B II make radiative transitions to the singly excited system. For a few autoionizing 2p3l levels we have calculated excitation energies and decay rates. The theoretical and experimental data are generally in very good agreement.

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Section: Methodsmentioning

confidence: 99%

Lifetimes of Doubly-Excited 2p3lLevels in Singly Ionized Boron, B II

et al. 1998

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“…It is well known in BFS that the charge distribution of the ions after the foil varies with the kinetic energy of the ions. For example, if 250 keV boron ions are used, the distribution is approximately 17% (neutral B), 59% (B + ), 21% (B 2+ ), and 2% (B 3+ ), whereas with 1.50 MeV it is 12% (B + ), 50% (B 2+ ), 35% (B 3+ ) and 3% (B 4+ ) (see Bickel et al [29], Martinson et al [9], and To and Drouin [30]). This variation of the charge state distribution was used to discriminate the lines belonging to different stages of ionization in the beam-foil spectra.…”

Section: Methodsmentioning

confidence: 99%

Additions to the spectrum and energy levels and critical compilation of doubly ionized boron, B III

et al. 2008

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We have undertaken the study of the Li-like spectrum of doubly ionized boron, B III. The spectroscopic data have been obtained with beam-foil spectroscopy and high-resolution spark spectroscopy. The experimental work was combined with theoretical calculations using ab initio and semi-empirical techniques. About 50 new transitions have been observed, and most of the previously known lines have been measured with improved accuracy. We have also critically evaluated all previous and recent data for this spectrum. Complete data on wavelengths and energy levels based on this analysis are tabulated.

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“…2 [2]. The open squares are extrapolated data from Wittkower and Betz [7] and Betz [8], except the boron and argon data, which were obtained from Bickel et al [9] and Knystautas and Jomphe [10], respectively. [4].…”

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Z1oscillations of the mean charge for isotachic ions in carbon foils

et al. 1995

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Oscillations in the mean-charge state of swift ions as a function of the atomic number Z& are reported for a wide range of ions of identical velocity (isotachic ions). A previously suggested mechanism for the enhancement of the mean charge for certain ion-charge combinations that involves closed shells is shown to be an inadequate explanation. Post-foil-Auger processes, however, are demonstrated to be a more plausible

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Equilibrium Charge Distributions of Boron in Carbon

Abstract: Equilibrium charge distributions of boron in carbon.

Cited by 14 publications

References 5 publications

Lifetimes of Doubly-Excited 2p3lLevels in Singly Ionized Boron, B II

Lifetimes of Doubly-Excited 2p3lLevels in Singly Ionized Boron, B II

Additions to the spectrum and energy levels and critical compilation of doubly ionized boron, B III

Z1oscillations of the mean charge for isotachic ions in carbon foils

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