Density diagnostic of a uranium laser-produced plasma from the line ratio of Δ<i>n</i>=1 transitions in Ni-like uranium

Mandelbaum, P.; Jf, Seely; Feldman, U.; Brown, Claire M.; Dr, Kania; Wh, Goldstein; Kauffman, R. L.; Langer, S.; Bar‐Shalom, A.

doi:10.1103/physreva.45.7480

Cited by 5 publications

(8 citation statements)

References 19 publications

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“…A similar excellent agreement between FAC and experimental results [17] apparently holds for the d p The comparison of FAC results with observed energies shows that the maximum energy difference (nearly 6.0 eV) appears for the electric quadrupole line ( p f 3 4 1D 2 ). The other FAC energies are closer to the measured ones [17,18] in comparison to our GRASP2 energies. It should be noted that there are significant differences (3.4-4.7eV) between EBIT measurements [16] and the laser-plasma experiment [18] for the d f 3 4 -D 3 1 level.…”

Section: Ni-like Usupporting

confidence: 82%

“…It should be noted that there are significant differences (3.4-4.7eV) between EBIT measurements [16] and the laser-plasma experiment [18] for the d f 3 4 -D 3 1 level. For the p f 3 4 -D 1 2 level, both the laser-plasma measurements performed by Mandelbaum et al [17,18] differ by 4.7 eV.…”

Section: Ni-like Umentioning

confidence: 85%

“…The level energies of Ni-like U predicted by Mandelbaum et al [17] with HULLAC atomic code are about 1-4 eV higher than the corresponding GRASP2 and FAC energies. The maximum energy difference of GRASP2 and observed energies [17,18] . This forbidden Q line in Ni-like U is of interest since its intensity ratio with the two electric dipole lines at λ = 2.984 Å and λ = 2.862 Å (see table 3) play an important role for density diagnostics of laser-produced uranium plasma [18].…”

Section: Ni-like Umentioning

confidence: 97%

“…The maximum energy difference of GRASP2 and observed energies [17,18] . This forbidden Q line in Ni-like U is of interest since its intensity ratio with the two electric dipole lines at λ = 2.984 Å and λ = 2.862 Å (see table 3) play an important role for density diagnostics of laser-produced uranium plasma [18]. Our GRASP2 and FAC energies are in closer agreement with the experimental data than the HUL-LAC results.…”

Section: Ni-like Umentioning

confidence: 97%

“…Most of the spectral features were identified as the transitions from Ni-like U by performing detailed and unresolved transition-array analysis of the measured spectra with HULLAC code. In a subsequent experiment, Mandelbaum et al [18] measured the line ratio of △ = n 1 transitions in Ni-like U for diagnostics of plasma parameters. Beiersdorfer [19] measured the energies of electric quadrupole (E2) and magnetic octupole (M3) lines in the x-ray spectrum of highly charged Ni-like ions (Th 62+ , U 64+ ) with an EBIT machine.…”

Section: Ni-like Umentioning

confidence: 99%

See 4 more Smart Citations

Energy levels, transition rates, oscillator strengths and lifetimes in Ne-like, Ni-like, and Cu-like uranium ions

Bari¹,

Nazir²,

Nasim³

et al. 2014

Phys. Scr.

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We present the fine-structure energy levels, wavelengths, oscillator strengths, transition energies, and transition rates of optically allowed inner-shell transitions of Ne-, Ni-, and Cu-like uranium ions by using the multiconfiguration Dirac-Fock method with the fully relativistic GRASP2 code (partly improved by us). In order to compare these results, we have performed other independent calculations with a fully relativistic Flexible Atomic Code (FAC). We have determined extensive configuration interaction wavefunctions to calculate the level energies of the inner-shell excited states of these three uranium ionic states. Overall, our calculated energy levels, wavelengths, transition rates, and oscillator strengths within the levels of selected configurations show better agreement with the available experimental and other theoretical results. Furthermore, we report radiative lifetimes of all the excited states of these three uranium ions. We also present many unpublished data about energy values, wavelengths, transitions rates, and oscillator strengths for inner-shell transitions. We believe that our calculated inner shell transition energies are of interest for the analysis of uranium x-ray spectra.

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Section: Ni-like Usupporting

confidence: 82%

Section: Ni-like Umentioning

confidence: 85%

Section: Ni-like Umentioning

confidence: 97%

Section: Ni-like Umentioning

confidence: 97%

Section: Ni-like Umentioning

confidence: 99%

See 3 more Smart Citations

Energy levels, transition rates, oscillator strengths and lifetimes in Ne-like, Ni-like, and Cu-like uranium ions

Bari¹,

Nazir²,

Nasim³

et al. 2014

Phys. Scr.

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Density diagnostic of highly ionized samarium laser produced plasma using Ni-like spatially resolved spectra

Louzon¹,

Henis²,

Levy³

et al. 2011

Laser Part. Beams

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Detailed spectroscopic identification and analysis of lines emitted by Ni-like ions may infer on plasma parameters, such as electron density, temperature, and ionization state. Spatially, resolved X-ray spectra of samarium laser produced plasma were recorded in the 7 to10 Å wavelength range. Measured line intensity ratios of Ni-like 3d-5f, 3p-4d, 3p-4s, and 3s-4p transitions were used for electron density diagnostic as a function of the distance from the target. Calculations using Hebrew University Lawrence Livermore Atomic Code show that these ratios are not very sensitive to the electron temperature in the range from 500 to 1000 eV. Self-absorption of some lines is found to be important at electron densities higher than 1021cm−3. The inferred ranges of electron density and temperature are found to be consistent with results of hydrodynamic simulations and models of ionization in plasma.

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3d-4px-ray spectrum emitted by highly ionized uranium from a laser-produced plasma in the 3.8<λ<4.4-Å wavelength range

et al. 1992

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Density diagnostic of a uranium laser-produced plasma from the line ratio of Δn=1 transitions in Ni-like uranium

Cited by 5 publications

References 19 publications

Energy levels, transition rates, oscillator strengths and lifetimes in Ne-like, Ni-like, and Cu-like uranium ions

Energy levels, transition rates, oscillator strengths and lifetimes in Ne-like, Ni-like, and Cu-like uranium ions

Density diagnostic of highly ionized samarium laser produced plasma using Ni-like spatially resolved spectra

3d-4px-ray spectrum emitted by highly ionized uranium from a laser-produced plasma in the 3.8<λ<4.4-Å wavelength range

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