Transition probabilities, oscillator strengths, and test ofJ-file sum rule for the 2p53p → 2p53s transition array in the neon emission spectra

2015 ◽  
Vol 93 (1) ◽  
pp. 80-84 ◽  
Author(s):  
Naveed K. Piracha ◽  
Dan Delanis ◽  
John Kaminsky ◽  
K. V. Duncan-Chamberlin ◽  
Haroon Asghar ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Wavelength Region ◽  
Emission Spectra ◽  
Spectral Lines ◽  
Oscillator Strengths ◽  
Sum Rule ◽  
Relative Line ◽  
Experimental Transition ◽  
Reported Data ◽  
Line Strengths

In this work experimental transition probabilities, line strengths, and atomic oscillator strengths of 30 spectral lines corresponding to the 2p53p → 2p53s transitions array of neon have been deduced using a neon-filled hollow cathode lamp in conjunction with two spectrographs covering the wavelength region from 500 to 1000 nm. The experimental absolute transition probabilities have been determined using the relative intensity method and lifetimes of the excited states. The transition probabilities have been converted to the line strengths data and used for testing the J-file sum rule. Relative line strengths of all the lines have been computed to determine the oscillator strength values. The measured transition probabilities, oscillator strengths, and relative line strengths agree well with the previously reported data.

Energy levels and spectral lines for Ge-like Zr, Nb and Tc ions

2020 ◽  
Author(s):  
Miao Wu ◽  
Zhen-Cen He
Keyword(s):  
Quantum Electrodynamics ◽  
Transition Probabilities ◽  
Theoretical Calculations ◽  
Energy Levels ◽  
Spectral Lines ◽  
Oscillator Strengths ◽  
Hartree Fock ◽  
Experimental Values ◽  
Theoretical Results ◽  
Line Strengths

The energy levels, transition probabilities, oscillator strengths, line strengths and wavelengths of Ge-like Zr, Nb and Tc ions have been calculated using the multiconfiguration Dirac-Hartree-Fock method. The Breit interactions and quantum electrodynamics correction were taken into account. The calculated values of energy levels and wavelengths have been compared with other theoretical calculations and available experimental values, good agreements are achieved for most of the energy levels and wavelengths calculated. The number of energy levels and wavelengths considered is larger than that of any other theoretical calculations. And the transition probabilities, line strengths are also given where no other theoretical results and experimental values are available.

scholarly journals Transition spectral parameters of In-like Ba, La and Ce ions

2021 ◽  
Author(s):  
Miao Wu ◽  
Zhencen He
Keyword(s):  
Quantum Electrodynamics ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Oscillator Strengths ◽  
Spectral Parameters ◽  
Hartree Fock ◽  
Experimental Values ◽  
Theoretical Results ◽  
Good Agreement ◽  
Line Strengths

The spectral parameters (energy levels, wavelengths, transition probabilities, line strengths and oscillator strengths) of resonance lines for Ba VIII, La IX and Ce X have been performed using the multiconfiguration Dirac-Hartree-Fock method, the contributions of quantum electrodynamics and Breit interactions correction are taken into considered. The calculated results of energy levels and wavelengths are in good agreement with experimental values and other calculation. The number of energy levels and wavelengths considered is larger than that of any other experiment values and other calculations. The transition probabilities, line strengths and oscillator strengths are also calculated where no other theoretical results and experimental values are available.

scholarly journals Experimental transition probabilities for 4p – 4d spectral lines in V II

2019 ◽  
Vol 622 ◽  
pp. A154 ◽  
Author(s):  
H. Nilsson ◽  
J. Andersson ◽  
L. Engström ◽  
H. Lundberg ◽  
H. Hartman
Keyword(s):  
Transition Probabilities ◽  
Branching Fractions ◽  
Theoretical Data ◽  
Spectral Lines ◽  
Time Resolved ◽  
Excitation Scheme ◽  
Photon Excitation ◽  
Experimental Transition ◽  
Experimental Values ◽  
Absolute Transition

Aims. We aim to measure lifetimes of levels belonging to the 3d3(4F)4d subconfiguration in V II, and derive absolute transition probabilities by combining the lifetimes with experimental branching fractions.Methods. The lifetimes were measured using time-resolved laser-induced fluorescence in a two-photon excitation scheme. The branching fractions were measured in intensity calibrated spectra from a hollow cathode discharge lamp, recorded with a Fourier transform spectrometer.Results. We report lifetimes for 13 levels at an energy around 73 000 cm−1. Absolute transition probabilities of 78 lines are derived by combining the lifetimes and branching fractions. The experimental values are compared with theoretical data from the literature.

scholarly journals High resolution X-ray emission spectra from picosecond laser irradiated Ge targets

2007 ◽  
Vol 25 (2) ◽  
pp. 245-252 ◽  
Author(s):  
J. Abdallah ◽  
D. Batani ◽  
T. Desai ◽  
G. Lucchini ◽  
A. Faenov ◽  
...  
Keyword(s):  
High Resolution ◽  
Laser System ◽  
Wavelength Region ◽  
Emission Spectra ◽  
Picosecond Laser ◽  
High Repetition Rate ◽  
Spectral Lines ◽  
X Ray ◽  
High Bulk ◽  
Better Than

Investigations of a high resolution X-ray emission spectrum in the range 0.66–0.75 nm obtained by irradiating a Germanium target with high-power p-polarized, 40 picosecond laser radiation at 532 nm wavelength was done. Spectra in the wavelength region of 2l-4l′ and 2l-5l′ L-shell transitions in F-like, Ne-like and Na-like germanium ions were recorded using the FSSR-2D spectrometer equipped with a spherically bent quartz crystal with a spectral resolution λ/Δλ better than 5000. Spectral lines were compared with theoretical values obtained using the LANL plasma kinetic code ATOMIC. Fair agreement between experimental and theoretical spectral lines has been observed, which allowed to measure enough high bulk electron temperature values of 560 eV and electron density of ∼1021 cm−3 in Ge plasma irradiated by rather small commercial high repetition rate Nd:YAG laser system.

High-resolution emission spectra of MgH and MgD in the 600 to 850 nm wavelength region

1978 ◽  
Vol 56 (6) ◽  
pp. 767-779 ◽  
Author(s):  
Walter J. Balfour ◽  
Bo Lindgren
Keyword(s):  
High Resolution ◽  
Excellent Agreement ◽  
Dissociation Energy ◽  
Ground State ◽  
Wavelength Region ◽  
Emission Spectra ◽  
Condon Factors ◽  
Reported Data ◽  
Dc Arc ◽  
Franck Condon

The emission spectra from a magnesium dc arc in hydrogen or deuterium have been photographed at high resolution from 600 to 850 nm. Thirteen new bands of MgH and 18 of MgD in the B′2Σ+–X2Σ+ system have been identified and complete rotational analyses have been performed. Term values have been obtained for all bound ground state rotational levels of MgH for ν = 4–9 and MgD for ν = 6–13 and limiting curves of dissociation have been used to determine the dissociation energy of MgH. The experimental value, D00″(MgH) = 1.27 ± 0.03 eV is in excellent agreement with theory. The ground state RKR potential curve and Franck–Condon factors for the B′–X system are reported. Data on the isotopic molecules 25MgH, 26MgH, 25MgD, and 26MgD have also been obtained.

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