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Excitation rates for transitions in Ca XV
Collision strengths for transitions among the energetically lowest 46 fine-structure levels belonging to the (1s^2^) 2s^2^2p^2^, 2s2p^3^, 2p^4^, and 2s^2^2p3l configurations of... -
17OH spin-rotation transition frequencies
The frequencies and line strengths of the ^2^{Pi}3/2 J=5/2-3/2 rotational transition of ^17^OH have been calculated from an analysis of its far-infrared laser magnetic resonance... -
Einstein A-coefficients for C3H2 and C2H4O
Cyclopropenylidene C_3_H_2_ and ethylene oxide C_2_H_4_O molecules are of astronomical importance as their observed lines, distributed throughout the observable microwave... -
Stark broadening of Be III lines
Using a semiclassical perturbation method, we have calculated electron-, proton-, and ionized helium-impact line widths and shifts for 52 Be III multiplets as a function of... -
Effective collision strengths for Fe XI trans.
Collision strengths for transitions among the lowest 48 fine-structure levels belonging to the (1s^2^2s^2^2p^6^) 3s^2^3p^4^, 3s3p^5^, 3s^2^3p^3^3d and 3p^6^ configurations of Fe... -
Co III electron-impact broadening parameters
In hot star atmospheres, the Stark broadening mechanism is the main pressure broadening mechanism. An interesting application where such a mechanism is of interest is the... -
Vinylacetylene millimeter-wave spectrum
The pure rotational spectrum of the hydrocarbon vinylacetylene in its ground vibrational state has been investigated from 80 to 165 GHz, covering the rotational quantum numbers... -
Oscillator strengths for Li-like ions
Ab initio calculations including relativistic effects in the Breit-Pauli R-matrix (BPRM) method are reported for fine structure energy levels and oscillator strengths upto n=10... -
Al I & Al II absolute transition probabilities
Relative intensity measurements of Al I and Al II spectral lines in the visible and ultraviolet spectral ranges are performed using a capacitively coupled high frequency double... -
M1 and E2 emission lines in K-like ions
Relativistic Quantum Defect Orbital (RQDO) calculations of transition probabilities for E2 (electric quadrupole) and M1 (magnetic dipole) forbidden transition in the potassium... -
NII effective recombination coefficients
We calculate effective recombination coefficients for the formation of selected lines of NII. New photoionization data are computed which accurately map the near threshold... -
N-like and O-like Breit-Pauli energy levels
Breit-Pauli results for energy levels, lifetimes, and Lande g_J_ factors have been determined for all levels up to 2p^2^ 3d of the nitrogen-like sequence (Z=7-17) and 2p^3^ 3d... -
Fe II transition probabilities and loggf
We report measurements of the relative intensities of 81 emission lines of Fe II between 160nm and 350nm (62168cm^-1^ to 28564cm^-1^) from 4 levels by high resolution Fourier... -
Diatomic molecules collisional rates
A number of diatomic molecules have been found in vibrationally excited states in several cosmic objects. The molecules in vibrationally excited states provide valuable... -
Einstein A-coefficients for C_3_H_4_
Following tentative detection of cyclopropene (C_3_H_4_) in Sgr B2 through its transition 3_22_-2_21_, several attempts to confirm the presence of cyclopropene in astronomical... -
Line ratios for helium-like ions
The tables include data concerning six He-like ions: wavelengths, transition probabilities, wavelengths at which the radiation temperatures should be determined. Line ratios (G... -
Forbidden transitions in Co(16+)
Theoretical line strengths and transition probabilities for electric quadrupole (E2) transitions between levels belonging to several important configurations of Co16+ are... -
IRON Project L
Effective collision strengths for transitions between 92 fine structure states calculated in a Breit-Pauli approximation are provided in ups.dat. Results are provided for log T... -
IRON Project XLIX
Effective collision strengths for transitions between 86 fine structure states calculated in a Breit-Pauli approximation are provided in ups.dat. Results are provided for log T... -
Fe XII UV line intensity ratios
A new set of radiative and electron collisional data for Fe XII was presented in two earlier papers. In the present work, we derive level populations and theoretical line...
