Anomalous<i>Z</i>dependence of a magnetic dipole transition in the Ti I isoelectronic sequence

Serpa, F. G.; Meyer, E. S.; Morgan, C. A.; Gillaspy, John D.; Sugar, Jack; Roberts, James R.; Brown, C. M.; Feldman, U.

doi:10.1103/physreva.53.2220

Cited by 34 publications

(18 citation statements)

References 13 publications

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“…In a later experiment [25] transitions in the Ti-like sequence from Nd 38+ and Gd 42+ were investigated to verify the expected wavelength scaling behavior. The wavelength data resulting from those measurements had an overall uncertainty of less than ±0.2 nm, and was useful, in combination with the earlier Xe and Ba data, to adjust the values of F k Slater integrals within the Cowan code [24] to 0.922, 0.930, 0.946, 0.962 for Xe, Ba, Nd, and Gd, respectively.…”

Section: The Electron Beam Ion Trap Application To Visible Spectroscopymentioning

confidence: 95%

“…The wavelength data resulting from those measurements had an overall uncertainty of less than ±0.2 nm, and was useful, in combination with the earlier Xe and Ba data, to adjust the values of F k Slater integrals within the Cowan code [24] to 0.922, 0.930, 0.946, 0.962 for Xe, Ba, Nd, and Gd, respectively. 25 was an enhancement of the Ti-like population due to resonant dielectronic recombination (DR) from the Sc-like Gd 43+ at around 3.8 keV beam energy, leading to intensified emission of the forbidden visible line. A weak peak at 314.4 nm found at the same electron beam energy was tentatively identified as due to the 3d 4 5 D 4 → 5 D 3 transition in the ground state configuration of Gd 42+ .…”

Section: The Electron Beam Ion Trap Application To Visible Spectroscopymentioning

confidence: 99%

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The visible spectrum of highly charged ions: A window to fundamental physics

López‐Urrutia¹

2008

Can. J. Phys.

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The observation of forbidden transitions in the visible range was the first experimental sign of the existence of highly charged ions in nature. Such lines can nowadays be excited in electron beam ion traps with excellent control of the ionic charge state, allowing their identification and precise determination of wavelengths and transition probabilities. The accuracy achieved in such experiments has been central to the study of nuclear size effects and quantum electrodynamic contributions, which are drastically magnified in highly charged ions, thus enabling the study of the underlying fundamental interactions in few-electron systems. At the same time, forbidden lines can be used to probe conditions in high temperature plasmas present in both astrophysical and laboratory environments.Résumé : L'observation de transitions interdites dans le visible a été le premier signe expérimental de l'existence d'ions hautement chargés dans la nature. Aujourd'hui, de telles lignes peuvent être excitées dans des pièges ioniques à faisceau d'électrons avec un excellent contrôle de la charge ionique, permettant leur identification et la détermination précise de leurs longueurs d'onde et de leurs probabilités de transition. La précision atteinte joue un rôle central dans l'étude des effets dus à la dimension du noyau et d'autres effets QED fondamentaux, qui sont significativement amplifiés dans les ions très chargés, permettant ainsi l'étude sous-jacente fondamentale des interactions dans les systèmes à peu d'électrons. Simultanément, les lignes interdites peuvent être utilisées pour sonder les conditions qui prévalent dans les plasmas de haute température présents en astrophysique et dans le laboratoire.[Traduit par la Rédaction]

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Section: The Electron Beam Ion Trap Application To Visible Spectroscopymentioning

confidence: 95%

Section: The Electron Beam Ion Trap Application To Visible Spectroscopymentioning

confidence: 99%

The visible spectrum of highly charged ions: A window to fundamental physics

López‐Urrutia¹

2008

Can. J. Phys.

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“…18 Although transitions in highly charged ions dominate in the x-ray region, visible transition exists for specific transitions of specific ions. Examples are hyperfine transitions for the ground states of H-like ions 19 with Zϭ65-85, and 3d 4 5 D 2 Ϫ 5 D 3 M1 transition of Ti-like ions 20 with Zϭ54-92. We are designing an echelle type of spectrometer which is considered to be very useful for the survey of unknown transitions such as hfs transitions for H-like ions.…”

Section: Ongoing and Planned Experimentsmentioning

confidence: 99%

The present status of the Tokyo electron beam ion trap

Nakamura¹,

Asada²,

Currell³

et al. 1998

Review of Scientific Instruments

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Recent progress of the Tokyo electron beam ion trap ͑Tokyo-EBIT͒ project is described. The Tokyo-EBIT is of an original design and construction with several features different from other EBITs in the world. The maximum energy and current of the electron beam are designed to be 340 keV and 300 mA with a magnetic field of 4.5 T. The ongoing and planned physics experiments are described and the results for the initial stage of operation of the Tokyo-EBIT are given.

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“…5 Electron beam ion trap measurements of optical radiation in the UV through visible band, of transitions that connect low-lying fine structure levels, were first reported by Morgan et al 6 who employed a scanning spectrometer. Further studies at various electron beam ion trap ͑EBIT͒ facilities mostly used moderate-resolution monochromators equipped with reflection gratings, either as scanning instruments [7][8][9] or with multichannel detectors. 10,11 Additional measurements employed a prism spectrometer with a multichannel detector.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a high-resolution, high-efficiency optical spectrometer

Utter

López‐Urrutia

Beiersdörfer

et al. 2002

Review of Scientific Instruments

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Articles you may be interested inEdge impurity rotation profile measurement by using high-resolution ultraviolet/visible spectrometer on J-TEXTa) Rev. Sci. Instrum. 85, 11E423 (2014); 10.1063/1.4891927 Development and operation of a high-throughput accurate-wavelength lens-based spectrometera) Rev. Sci. Instrum. 85, 11E404 (2014); 10.1063/1.4884612 High-throughput accurate-wavelength lens-based visible spectrometera) Rev. Sci. Instrum. 81, 10D731 (2010);We present the design, implementation and testing of a high-efficiency, high-resolution transmission grating spectrometer for measurements of near-ultraviolet to visible-range spectra of light from an electron beam ion trap, where geometry is constrained. The system consists of two 5 in. diameter f /4.6 achromatic lenses, a 6 in. diameter transmission grating ion-beam etched in fused silica, and a thinned, backilluminated CCD detector. The simple design minimizes the number of optical components, each with optimal throughput and high efficiency. Using a 30 m wide entrance slit, a resolving power (/⌬) of 15 400 at Ϸ3850 Å has been demonstrated. The features and limitations of the instrument have been explored and an in situ calibration technique for use on the Livermore EBIT-II and SuperEBIT electron beam ion traps has been developed.

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AnomalousZdependence of a magnetic dipole transition in the Ti I isoelectronic sequence

Cited by 34 publications

References 13 publications

The visible spectrum of highly charged ions: A window to fundamental physics

The visible spectrum of highly charged ions: A window to fundamental physics

The present status of the Tokyo electron beam ion trap

Design and implementation of a high-resolution, high-efficiency optical spectrometer

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