scholarly journals Measurement of a magnetic-dipole transition probability inXe32+using an electron-beam ion trap

1997 ◽  
Vol 55 (6) ◽  
pp. 4196-4200 ◽  
Author(s):  
F. G. Serpa ◽  
C. A. Morgan ◽  
E. S. Meyer ◽  
J. D. Gillaspy ◽  
E. Träbert ◽  
...  
Keyword(s):  
Electron Beam ◽  
Magnetic Dipole ◽  
Ion Trap ◽  
Transition Probability ◽  
Dipole Transition ◽  
Magnetic Dipole Transition ◽  
Electron Beam Ion Trap

Spectroscopic analysis of M- and N-intrashell transitions in Co-like to Na-like Yb ions

2021 ◽  
Author(s):  
Roshani Silwal ◽  
Dipti Dipti ◽  
Endre Takacs ◽  
Joan M. Dreiling ◽  
Samuel C Sanders ◽  
...  
Keyword(s):  
Electron Beam ◽  
Magnetic Dipole ◽  
Large Scale ◽  
Ion Trap ◽  
Extreme Ultraviolet ◽  
Wavelength Region ◽  
Grazing Incidence ◽  
Spectral Lines ◽  
Electron Beam Ion Trap ◽  
Large Scale Simulations

Abstract The M-intrashell spectra from Co-like Yb43+ through Na-like Yb59+ ions produced in an electron beam ion trap (EBIT) at the National Institute of Standards and Technology have been studied in the extreme ultraviolet (EUV) range. A few N-intrashell transitions for Co-like Yb43+ and Fe-like Yb44+ are also reported. The EUV radiation was observed with a flat-field grazing incidence spectrometer in the wavelength region of about 7.5 nm to 26.2 nm. The electron beam energies were varied between 3.6 keV and 18 keV to produce the ionization stages of interest. The line identifications were based on the large-scale simulations of the EBIT plasma emission using the non-Maxwellian collisional-radiative code NOMAD. A total of 76 previously unobserved spectral lines corresponding to electric-dipole and magnetic-dipole transitions in the above mentioned ions were identified and discussed. In particular, our accurate wavelength of 24.3855±0.0005 nm for a magnetic-dipole (M1) transition in the ground configuration of Co-like ion presents a solid benchmark for comparisons with the most advanced theories of atomic structure.

Precise wavelength determination of the 4s24p 2P3/2 - 2P1/2 transition in Mo11+ and Ru13+ ions

2021 ◽  
Author(s):  
Yajing Li ◽  
Yintao Wang ◽  
Junyu Fan ◽  
Ran Si ◽  
Jiguang Li ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Dipole Transition ◽  
Experimental Uncertainty ◽  
External Calibration ◽  
Direct Observations ◽  
Electron Beam Ion Trap ◽  
Calibration Methods ◽  
Highly Charged Ion

Abstract The 4s24p 2P3/2 – 2P1/2 magnetic dipole transition in Ga-like ions is interested in developing of high precise highly charged ion clock [Phys. Rev. A, 99, 02213(2019)]. In this work, we present direct observations of the transition in Mo11+ and Ru13+ ions at an electron beam ion trap. Internal and external calibration methods are used for determining the wavelength of the Mo11+ and Ru13+ lines, respectively. Both measurements reach precision levels of a few ppm. Compared with the available values, the current results significantly improve the experimental uncertainty.

scholarly journals Emission Lines in 290–360 nm of Highly Charged Tungsten Ions W20+–W29+

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 63
Author(s):  
Shota Era ◽  
Daiji Kato ◽  
Hiroyuki A. Sakaue ◽  
Toshiki Umezaki ◽  
Nobuyuki Nakamura ◽  
...  
Keyword(s):  
Electron Beam ◽  
Excited States ◽  
Magnetic Dipole ◽  
Ion Trap ◽  
Emission Lines ◽  
Fusion Plasmas ◽  
Hartree Fock ◽  
Electron Beam Ion Trap ◽  
Forbidden Transitions ◽  
Good Agreement

Forbidden transitions in the near-UV and visible wavelength of highly charged tungsten (W) ions are potentially useful as novel tungsten diagnostics means of fusion plasmas. Emission lines in 290–360 nm from Wq+ ions interacting with an electron beam of 540–1370 eV are measured, using a compact electron-beam-ion-trap. The charge states of 64 lines are identified as W20+–W29+. A magnetic-dipole (M1) line of W29+ between the excited states (4d84f)[(4d5/2−2)44f7/2]13/2→[(4d5/2−2)44f5/2]13/2 is newly identified; the wavelength is determined as 351.03(10) nm in air. The theoretical wavelength calculated using the multiconfiguration Dirac–Hartree–Fock method is in a good agreement with the measurement.

Forbidden Transitions in the Visible Spectra of an Electron Beam Ion Trap (EBIT)

1998 ◽  
Vol 58 (6) ◽  
pp. 599-604 ◽  
Author(s):  
E Träbert ◽  
P Beiersdorfer ◽  
S B Utter ◽  
J R Crespo López-Urrutia
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Electron Beam Ion Trap ◽  
Visible Spectra ◽  
Forbidden Transitions

The a1Δg→X3Σ−g magnetic dipole transition of S2

2003 ◽  
Vol 221 (1) ◽  
pp. 127-130 ◽  
Author(s):  
K.D. Setzer ◽  
M. Kalb ◽  
E.H. Fink
Keyword(s):  
Magnetic Dipole ◽  
Dipole Transition ◽  
Magnetic Dipole Transition

Soft-X-ray spectra of highly charged Au ions in an electron-beam ion trap

2001 ◽  
Vol 79 (2-3) ◽  
pp. 153-162 ◽  
Author(s):  
E Träbert ◽  
P Beiersdorfer ◽  
K B Fournier ◽  
S B Utter ◽  
K L Wong
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Large Scale ◽  
Ion Trap ◽  
Electron Beam Energy ◽  
X Ray ◽  
Maximum Charge ◽  
Electron Beam Ion Trap ◽  
Atomic Structure Calculations ◽  
Structure Calculations

Systematic variation of the electron-beam energy in an electron-beam ion trap has been employed to produce soft-X-ray spectra (20 to 60 Å) of Au with well-defined maximum charge states ranging from Br- to Co-like ions. Guided by large-scale relativistic atomic structure calculations, the strongest Δn = 0 (n = 4 to n' = 4) transitions in Rb- to Cu-like ions (Au42+ – Au50+) have been identified. PACS Nos.: 32.30Rj, 39.30+w, 31.50+w, 32.20R

Measurements of Temperature Dynamics of Ions Trapped Inside an Electron Beam Ion Trap and Evidence for Ionisation Heating

2001 ◽  
Vol T92 (1) ◽  
pp. 147-149 ◽  
Author(s):  
F. J. Currell ◽  
F. J. Currell ◽  
H. Kuramoto ◽  
S. Ohtani ◽  
C. Scullion ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Electron Beam Ion Trap ◽  
Temperature Dynamics
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