Transition probabilities, oscillator strengths and lifetimes for singly ionized magnesium

Çelik, Gültekin; Ateş, Şule; Özarslan, Selma; Taşer, Mehmet

doi:10.1016/j.jqsrt.2011.06.010

Cited by 17 publications

(8 citation statements)

References 14 publications

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“…Mg + ion: The lifetimes of the (3-5)P [83] except for the discrepancy that our results for 5P 3/2,1/2 states do not match very well with the values given by Fischer et al [69].…”

Section: Lifetimes Of Atomic Statescontrasting

confidence: 99%

“…Discrepancy is also found between our lifetime result of 5D 3/2 state and other theoretical calculations [69,83]. We have employed more sophisticated relativistic all order method whereas, MCHF and WBEPMT methods employed by [69] and [83] respectively are non-relativistic methods. Therefore we advocate the reliability of our results in this case.…”

Section: Lifetimes Of Atomic Statescontrasting

confidence: 54%

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Radiative Transition Properties of Singly Charged Magnesium, Calcium, Strontium and Barium Ions

Kaur,

Dar,

Sahoo

et al. 2020

Preprint

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Accurate values of electric dipole (E1) amplitudes along with their uncertainties for a number of transitions among low-lying states of Mg + , Ca + , Sr + , and Ba + are listed by carrying out calculations using a relativistic all-order manybody method. By combining experimental wavelengths with these amplitudes, we quote transition probabilities, oscillator strengths and lifetimes of many short-lived excited states of the above ions. The uncertainties in these radiative properties are also quoted. We also give electric quadrupole (E2) and magnetic dipole (M1) amplitudes of the metastable states of the Ca + , Sr + , and Ba + ions by performing similar calculations. Using these calculated E1, E2 and M1 matrix elements, we have estimated the transition probabilities, oscillator strengths and lifetimes of a number of allowed and metastable states. These quantities are further compared with the values available from the other theoretical studies and experimental data in the literature. These data will be immensely useful for the astrophysical observations, laboratory analysis and simulations of spectral properties in the above considered alkaline-earth metal ions.

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“…Mg + ion: The lifetimes of the (3-5)P [83] except for the discrepancy that our results for 5P 3/2,1/2 states do not match very well with the values given by Fischer et al [69].…”

Section: Lifetimes Of Atomic Statescontrasting

confidence: 99%

Section: Lifetimes Of Atomic Statescontrasting

confidence: 54%

Radiative Transition Properties of Singly Charged Magnesium, Calcium, Strontium and Barium Ions

Kaur,

Dar,

Sahoo

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…And in past few years many elements in their atomic and ionic states were studied by this theory because of its semi-empirical nature. All these studies show remarkably good agreement in comparison with experimental results [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionsupporting

confidence: 63%

Precise Computation of Energy Levels and Radiative Lifetimes in the s, p, d, and f Sequence of Hydrogen Isotope, with Natural Line Widths

2019

JNSR

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Energy levels and Radiative lifetimes in Deuterium for the following: ns 2 S1/2(n≥2), np 2 P o (1/2,3/2)(n≥2), nd 2 D(3/2,5/2)(n≥3), and nf 2 F o (5/2,7/2)(n≥4) sequence have been evaluated with uncertainties in energies caused due to uncertainty principal. Theoretical calculations performed utilizing the Weakest Bound Electron Potential Model Theory (WBEPMT). Both sets of data show quite an excellent agreement with the experimental data listed at NIST. This theoretical computation is also a continuation of the work by Raza. S. et al. in Neutral Hydrogen. The high 'n' (principal quantum number) values for both sets of data are presented very first time by utilizing WBEPMT.

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“…The intensity ratio is a simple and useful tool for plasma diagnostics and can be used to investigate their opacity. Under the optically thin assumption in a collision-dominated plasma, the k/h ratio is simply the ratio of the oscillator strengths, 2:1 (Mathioudakis et al 1999;Çelik et al 2011). In the optically thick case, this ratio is smaller.…”

Section: Mg K/h Ratiomentioning

confidence: 99%

Launch of a CME-associated eruptive prominence as observed with IRIS and ancillary instruments

Zhang

Buchlin

Vial

2019

A&A

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Aims. In this paper we focus on the possible observational signatures of the processes which have been put forward for explaining eruptive prominences. We also try to understand the variations in the physical conditions of eruptive prominences and estimate the masses leaving the Sun versus the masses returning to the Sun during eruptive prominences. Methods. As far as velocities are concerned, we combined an optical flow method on the Atmospheric Imaging Assembly (AIA) 304 Å and Interface Region Imaging Spectrograph (IRIS). Mg II h&k observations in order to derive the plane-of-sky velocities in the prominence, and a Doppler technique on the IRIS Mg II h&k profiles to compute the line-of-sight velocities. As far as densities are concerned, we compared the absolute observed intensities with values derived from non-local thermodynamic equilibrium radiative transfer computations to derive the total (hydrogen) density and consequently compute the mass flows. Results. The derived electron densities range from 1.3 × 109 to 6.0 × 1010 cm−3 and the derived total hydrogen densities range from 1.5 × 109 to 2.4 × 1011 cm−3 in different regions of the prominence. The mean temperature is around 1.1 × 104 K, which is higher than in quiescent prominences. The ionization degree is in the range of 0.1–10. The total (hydrogen) mass is in the range of 1.3 × 1014–3.2 × 1014 g. The total mass drainage from the prominence to the solar surface during the whole observation time of IRIS is about one order of magnitude smaller than the total mass of the prominence.

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Transition probabilities, oscillator strengths and lifetimes for singly ionized magnesium

Cited by 17 publications

References 14 publications

Radiative Transition Properties of Singly Charged Magnesium, Calcium, Strontium and Barium Ions

Radiative Transition Properties of Singly Charged Magnesium, Calcium, Strontium and Barium Ions

Precise Computation of Energy Levels and Radiative Lifetimes in the s, p, d, and f Sequence of Hydrogen Isotope, with Natural Line Widths

Launch of a CME-associated eruptive prominence as observed with IRIS and ancillary instruments

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