An alternative method for determination of oscillator strengths: The example of Sc II

Ruczkowski, J.; Elantkowska, M.; Dembczyński, J.

doi:10.1016/j.jqsrt.2014.04.018

Cited by 38 publications

(48 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average deviations of the least-squares fits were 157 cm −1 for the 93 even-parity experimental levels and 65 cm −1 for the 75 odd-parity experimental levels. (Buchta et al 1971;Arnesen et al 1976;Palenius et al 1976;Vogel et al 1985;Marsden et al 1988), the HFR values calculated by Kurucz (2011) and the lifetimes deduced from the semi-empirical oscillator strengths calculated by Ruczkowski et al (2014). On average, our HFR+CPOL lifetimes are shorter than the measurements for the odd-parity levels and longer for the even-parity levels.…”

Section: R a D I At I V E Pa R A M E T E R C A L C U L At I O N Smentioning

confidence: 46%

“…Although the calculation of Kurucz (2011) shows a better agreement than HFR+CPOL for certain 3d4d levels ( 3 F 2, 4 , 1 D 2 and 3 P 2 ), it does not solve the theory-experiment disagreements observed for the levels 4p 2 1 D 2 and 3d6s 3 D 3 . The parametric calculation of Ruczkowski et al (2014) TR-LIF measurement is slightly lower than the one of Marsden et al (1988) although the error bars do overlap. For all 3d4p levels, our HFR+CPOL model and the parametric calculation of Ruczkowski et al (2014) are closer to the measurement of Marsden et al (1988).…”

Section: R a D I At I V E Pa R A M E T E R C A L C U L At I O N Smentioning

confidence: 77%

“…The parametric calculation of Ruczkowski et al (2014) TR-LIF measurement is slightly lower than the one of Marsden et al (1988) although the error bars do overlap. For all 3d4p levels, our HFR+CPOL model and the parametric calculation of Ruczkowski et al (2014) are closer to the measurement of Marsden et al (1988). The excellent agreement between Marsden et al (1988) and Ruczkowski et al (2014) is not surprising as the latter adjusted the dipole transition integrals to the oscillator strengths determined from the branching fraction measurements of Lawler & Dakin (1989) combined with the lifetime measurements of Marsden et al (1988).…”

Section: R a D I At I V E Pa R A M E T E R C A L C U L At I O N Smentioning

confidence: 77%

“…Older lifetime measurements in singly ionized scandium have focused on lower excited odd-parity 3d4p and 4s4p levels (Buchta et al 1971;Arnesen et al 1976;Palenius, Curtis & Lundlin 1976;Vogel et al 1985). On the theoretical side, the most recent calculations of E1 oscillator strengths in Sc II are given in Ruczkowski, Elantkowska & Dembczynski (2014) and Kurucz (2011). The main goal of this work is to provide a new set of experimental f-values for transitions depopulating the highly excited even-parity levels in Sc II, and new calculations for both low-and high-excitation levels and lines.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Lifetime measurements and oscillator strengths in singly ionized scandium and the solar abundance of scandium

Rhodin

Belmonte

Engström

et al. 2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

The lifetimes of 17 even-parity levels (3d5s, 3d4d, 3d6s and 4p2 ) in the region 57 743-77 837 cm −1 of singly ionized scandium (Sc II) were measured by two-step timeresolved laser induced fluorescence spectroscopy. Oscillator strengths of 57 lines from these highly excited upper levels were derived using a hollow cathode discharge lamp and a Fourier transform spectrometer. In addition, Hartree-Fock calculations where both the main relativistic and core-polarization effects were taken into account were carried out for both low-and high-excitation levels. There is a good agreement for most of the lines between our calculated branching fractions and the measurements of Lawler & Dakin in the region 9000-45 000 cm −1 for low excitation levels and with our measurements for high excitation levels in the region 23 500-63 100 cm −1 . This, in turn, allowed us to combine the calculated branching fractions with the available experimental lifetimes to determine semi-empirical oscillator strengths for a set of 380 E1 transitions in Sc II. These oscillator strengths include the weak lines that were used previously to derive the solar abundance of scandium. The solar abundance of scandium is now estimated to log = 3.04 ± 0.13 using these semi-empirical oscillator strengths to shift the values determined by Scott et al. The new estimated abundance value is in agreement with the meteoritic value (log met = 3.05 ± 0.02) of Lodders, Palme & Gail.

show abstract

Section: R a D I At I V E Pa R A M E T E R C A L C U L At I O N Smentioning

confidence: 46%

Section: R a D I At I V E Pa R A M E T E R C A L C U L At I O N Smentioning

confidence: 77%

Section: R a D I At I V E Pa R A M E T E R C A L C U L At I O N Smentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lifetime measurements and oscillator strengths in singly ionized scandium and the solar abundance of scandium

Rhodin

Belmonte

Engström

et al. 2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…We had recourse to a semi-empirical method for parametrization of oscillator strengths. The complete details of this method were already described in previous paper [6]; nevertheless let us mention once more that we transformed angular coefficients of the transition matrix from SL coupling to intermediate one, using fine structure eigenvector amplitudes, previously determined [7][8][9] and presently reanalyzed for odd-parity ones.…”

Section: Oscillator Strength Parametrization Methodsmentioning

confidence: 99%

Semi-empirical studies of atomic transition probabilities, oscillator strengths and radiative lifetimes in Hf II

Bouazza

Quinet

Palmeri

2015

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

a b s t r a c tOver the past few years, laser induced fluorescence and Fourier Transform techniques have been applied to measure radiative lifetimes and branching fractions in Hf II in order to derive oscillator strengths and transition probabilities. In the present work, we propose to compare for the first time these experimental data to computed values obtained by two different semi-empirical approaches, respectively based on a parametrization of the oscillator strengths and on a pseudo-relativistic Hartree-Fock model including corepolarization effects. The overall agreement between all sets of data is found to be good. We furthermore give radial integrals of the main atomic transitions in this study: 〈5d6s6p| r 1 |5d 2 6s〉¼ 0.1504 (0.0064), 〈6s 2 6p|r 1 |5d6s 2 〉¼ 1.299 (0.012), 〈5d 2 6p|r 1 |5d 2 6s〉¼ À0.298 (0.013), 〈5d 2 6p|r 1 |5d 3 〉¼ 2.025 (0.027). Finally a new set of oscillator strengths and transition probabilities is reported for many transitions in Hf II.

show abstract

Research on atomic structure and collision cross-sections for spectroscopic modeling in KAERI Atomic Data Center

Kwon

Chai

2023

J. Korean Phys. Soc.

View full text Add to dashboard Cite

An alternative method for determination of oscillator strengths: The example of Sc II

Cited by 38 publications

References 47 publications

Lifetime measurements and oscillator strengths in singly ionized scandium and the solar abundance of scandium

Lifetime measurements and oscillator strengths in singly ionized scandium and the solar abundance of scandium

Semi-empirical studies of atomic transition probabilities, oscillator strengths and radiative lifetimes in Hf II

Research on atomic structure and collision cross-sections for spectroscopic modeling in KAERI Atomic Data Center

Contact Info

Product

Resources

About