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Atomic structure calculations and Beam-foil observations of La IV Biémont, Emile ; ; et al in Canadian Journal of Physics (2009), 87 Relativistic Hartree–Fock and multiconfigurational Dirac–Fock calculations of atomic structure and transition rates have been carried out in trebly ionized lanthanum (La3+, Z = 57). The calculations have ... [more ▼] Relativistic Hartree–Fock and multiconfigurational Dirac–Fock calculations of atomic structure and transition rates have been carried out in trebly ionized lanthanum (La3+, Z = 57). The calculations have to cope with configuration interaction effects but also with the very complex situation of the collapse of the 4f wave function. The calculations are compared to experimental data obtained with beam-foil spectroscopy in the extreme ultraviolet, at ion energies that favour <br />the production of the spectrum La IV. Besides lines known from sliding spark discharges, many more lines are observed that have not yet been identified. Time-resolved measurements yield three level lifetimes in La IV that agree roughly with the results of our own calculations. [less ▲] Detailed reference viewed: 41 (5 ULg)Relativistic atomic data for EUV and X-ray lines in the highly charged Zn-like ions from Yb40+ to U62+ Quinet, Pascal ; Biémont, Emile ; et al in Atomic Data and Nuclear Data Tables (2007), 93(5), 711-729 The wavelengths and transition probabilities for EUV and X-ray lines in the spectra from Yb XLI to U LXIII along the zinc isoelectronic sequence have been calculated using a multiconfiguration Dirac-Fock ... [more ▼] The wavelengths and transition probabilities for EUV and X-ray lines in the spectra from Yb XLI to U LXIII along the zinc isoelectronic sequence have been calculated using a multiconfiguration Dirac-Fock (MCDF) model. Results are reported for the 4S(2) -4s4p, 4s4p-4p(2), and 4s4p-4s4d transitions. A comparison of the calculated wavelengths with the few experimental results available is also presented. (c) 2007 Elsevier Inc. All rights reserved. [less ▲] Detailed reference viewed: 14 (0 ULg)Wavelengths and transition probabilities in heavy Ge-like ions (70 <= Z <= 92) ; Quinet, Pascal ; Biémont, Emile et al in Atomic Data and Nuclear Data Tables (2007), 93(3), 355-374 Wavelengths and transition probabilities have been calculated for the 4s(2)4P(2) -4s4P(3) and 4s(2)4p(2) -4s(2)4p4d allowed transitions and for the forbidden (M1 and E2) transitions occurring within the ... [more ▼] Wavelengths and transition probabilities have been calculated for the 4s(2)4P(2) -4s4P(3) and 4s(2)4p(2) -4s(2)4p4d allowed transitions and for the forbidden (M1 and E2) transitions occurring within the ground configuration (4s(2)4p(2)) in the heavy Ge-like ions with Z = 70-92. The fully relativistic multiconfiguration Dirac-Fock method taking into account both the correlations within the n = 4 complex and the QED effects has been used for the calculations. The present results are compared to and agree well with recent electron-beam ion-trap measurements in tungsten, osmium, gold, bismuth, thorium, and uranium. (C) 2006 Elsevier Inc. All rights reserved. [less ▲] Detailed reference viewed: 21 (0 ULg)Wavelengths and transition probabilities for n= 4 -> n '=4 transitions in heavy Cu-like ions (70 <= Z <= 92) ; Quinet, Pascal ; Biémont, Emile et al in Atomic Data and Nuclear Data Tables (2007), 93(3), 537-547 Wavelengths and transition probabilities have been calculated for the n = 4 ->-> n' = 4 allowed transitions in the heavy Cu-like ions with Z = 70-92. Fully relativistic multiconfiguration Dirac-Fock (MCDF ... [more ▼] Wavelengths and transition probabilities have been calculated for the n = 4 ->-> n' = 4 allowed transitions in the heavy Cu-like ions with Z = 70-92. Fully relativistic multiconfiguration Dirac-Fock (MCDF) calculations were carried out. They take into account the correlations within the it = 4 complex, the core-valence n = 3 ->-> n' = 4 virtual excitations, and quantum electrodynamics effects. The present results are compared to and agree well with recent electron-beam ion-trap (EBIT) measurements in ytterbium, tungsten, osmium, gold, lead, bismuth, thorium, and uranium. (C) 2006 Elsevier Inc. All rights reserved. [less ▲] Detailed reference viewed: 18 (0 ULg)Multiconfiguration Dirac-Fock wavelengths and transition rates in the X-ray spectra of highly charged Ga-like ions from Yb39+ to U61+ Quinet, Pascal ; Biémont, Emile ; et al in Atomic Data and Nuclear Data Tables (2007), 93(1), 167-182 A multiconfiguration Dirac-Fock (MCDF) technique has been used for computing the wavelengths and transition probabilities for lines in the X-ray spectra of the gallium-like ions from Yb XL to U LXII ... [more ▼] A multiconfiguration Dirac-Fock (MCDF) technique has been used for computing the wavelengths and transition probabilities for lines in the X-ray spectra of the gallium-like ions from Yb XL to U LXII. Results are presented for the 4s(2)4p-4s(2)4d and 4s(2)4p-4s4p(2) allowed transitions (E1) as well as for the forbidden transitions (M1 and E2) within the ground configuration 4s(2)4p. A comparison of the calculated wavelengths with the few experimental results available is also presented. (c) 2006 Elsevier Inc. All rights reserved. [less ▲] Detailed reference viewed: 12 (0 ULg)Relativistic atomic data for EUV and X-ray spectra of highly charged Cu-, Zn-, Ga- and Ge-like ions (70 ≤ Z ≤ 92) Quinet, Pascal ; Biémont, Emile ; et al in Journal of Physics : B Atomic Molecular & Optical Physics (2007), 58 Wavelengths and transition probabilities have been calculated for the n=4, Δn=0 allowed transitions in the heavy Cu-, Zn-, Ga- and Ge-like ions with Z=70–92. Fully relativistic multiconfiguration Dirac ... [more ▼] Wavelengths and transition probabilities have been calculated for the n=4, Δn=0 allowed transitions in the heavy Cu-, Zn-, Ga- and Ge-like ions with Z=70–92. Fully relativistic multiconfiguration Dirac-Fock (MCDF) computations were carried out. The present results are compared to and agree well with recent electron-beam ion-trap (EBIT) measurements in Yb, W, Os, Au, Pb, Bi, Th and U ions. [less ▲] Detailed reference viewed: 16 (0 ULg)Level lifetimes in 3p and 3d configurations of Fe XII Biémont, Emile ; ; Quinet, Pascal et al in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2002), 20(1), 37-44 Transitions between the five fine-structure levels in the 3s(2)3p(3) ground configuration of Fe XII (P-like) are of interest in astrophysics and terrestrial plasma diagnostics. The decay rates give rise ... [more ▼] Transitions between the five fine-structure levels in the 3s(2)3p(3) ground configuration of Fe XII (P-like) are of interest in astrophysics and terrestrial plasma diagnostics. The decay rates give rise to level lifetimes in the millisecond range, which have been measured recently at a heavy-ion storage ring. While most of the 3s(2)3p(2)3d levels are short-lived, two of these levels have no El decay channels and may also have millisecond lifetimes. We present HFR and MCDF calculations of the El, M1, E2 and M2 transition rates between the 3s(2)3p(3), 3s3p(4) and 3s(2)3p(2)3d levels and compare the lifetime results to most recent experimental data as well as to other predictions. [less ▲] Detailed reference viewed: 5 (1 ULg)M1/E2 transition rates in Fe x through Fe XIII measured at a heavy-ion storage ring ; ; et al in Journal of Physics B-Atomic Molecular and Optical Physics (2002), 35(3), 671-689 The rates of several electric-dipole forbidden decays of 3p and 3d levels in Cl-, S-, P- and Si-like ions of Fe have been measured optically at a heavy-ion storage ring. In several cases, more than one ... [more ▼] The rates of several electric-dipole forbidden decays of 3p and 3d levels in Cl-, S-, P- and Si-like ions of Fe have been measured optically at a heavy-ion storage ring. In several cases, more than one decay contributes to a given decay curve, which complicates the analysis. The lifetime results, with a precision range from 0.6 to 20%, compare well with some theoretical predictions, but are more precise. They are also more precise than some experimental data from an electrostatic ion trap. [less ▲] Detailed reference viewed: 33 (5 ULg)Singlet-triplet excitation ratios in Ne III, Ar III and N II under ion impact ; Garnir, Henri-Pierre ; Dumont, Paul-Dominique et al in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2001), 15 Peculiar properties of ion-atom collision systems, in particular deviations from statistical populations of singlet and triplet levels, can be studied by optical spectroscopy.We have extended earlier ... [more ▼] Peculiar properties of ion-atom collision systems, in particular deviations from statistical populations of singlet and triplet levels, can be studied by optical spectroscopy.We have extended earlier studies by VUV spectroscopy of a number of collision systems at various collision energies in the 0.01-MeV/nucleon to 1-MeV/nucleon range, involving H+ 2 , H+, He+, He2+, Ne+, Ar+, and N+ 2 as projectiles and Ne, Ar, and N2 as target gases. Statistically signi cant deviations of the relative intensities of singlet and triplet lines from simple ratios are observed in the displaced terms of the valence shell of Ne III, corroborating and extending earlier work. For Ar III, the energy dependences of singlet-to-triplet excitation ratios are very different for dff erent projectiles. For NII, in contrast, all observed line ratios are practically independent of the projectile energy. [less ▲] Detailed reference viewed: 16 (2 ULg)Beam-gas excitation of Ar III 3s3p5 singlet and triplet terms Garnir, Henri-Pierre ; ; Dumont, Paul-Dominique et al Poster (2001) Detailed reference viewed: 13 (5 ULg)Beam-gas excitation of Ar III 3s3p5 singlet and triplet terms Garnir, Henri-Pierre ; ; Dumont, Paul-Dominique et al Poster (2001) Detailed reference viewed: 4 (1 ULg)Calculated transition probabilities in highly charged Ti-like ions Biémont, Emile ; ; in Journal of Physics : B Atomic Molecular & Optical Physics (2001), 34 Detailed reference viewed: 10 (3 ULg)Experimental M1 Transition Rates in Highly Charged Krypton Ions ; ; et al in Physical Review. A (2001), 64 Detailed reference viewed: 12 (2 ULg)Transition rates of the resonance line doublet in the Cl I sequence, Ar II to Ge XVI Biémont, Emile ; in Journal of Physics : B Atomic Molecular & Optical Physics (2000), 33 Detailed reference viewed: 7 (2 ULg)Atomic Lifetimes and Transition Probabilities in Boron-like (Na VII) and Beryllium-like (Na VIII) Sodium Ions Tordoir, Xavier ; Biémont, Emile ; Garnir, Henri-Pierre et al in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (1999), 6 Detailed reference viewed: 14 (1 ULg)Atomic Lifetimes of n=2 Levels of Boron-like Na Tordoir, Xavier ; Biémont, Emile ; Garnir, Henri-Pierre et al Conference (1998, August) Detailed reference viewed: 5 (0 ULg) |
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