Some considerations concerning radiation transport in the OI 1304 triplet in the upper atmosphere.
Radiation transport in optically thick medium where natural wings of lines are important and 1304 OI triplet in upper atmosphere
RADIATION TRANSFER↗
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Relativistic effects in the excitation of triplet helium states by electrons.
Pure rearrangement collisions in excitation of triplet helium states by electrons, discussing relativistic contributions to cross section
Mittleman, M. H.↗
Singlet-triplet formulation for dilute magnetic alloys. I.
Singlet-triplet pair Green functions formulated for s-d exchange model of dilute magnetic alloys with single magnetic impurity
Alexander, S.↗
Singlet-triplet formulation for dilute magnetic alloys. II.
Anderson model of dilute magnetic alloy studied using singlet-triplet pair Green functions, noting existence of pole of function below certain temperature
Fibich, M.↗
Calculated electron and ion Stark broadening of the allowed and forbidden 2P-nL /n greater than or equal to 5, L equals 1, 2, ..., n - 1/ triplet and singlet transitions in neutral helium.
Electron and ion Stark broadening of allowed and forbidden, triplet and singlet transitions in neutral He at low electron densities, noting Doppler broadening
Gieske, H. A.↗
Singlet-triplet mixing in the helium sequence.
Off-diagonal matrix elements of Breit interaction between singlet-triplet transitions for helium isoelectronic sequences
Drake, G. W. F.↗
Line broadening of the triplet diffuse series of helium in an arc-jet plasma
Line broadening of triplet diffuse series of helium in arc-jet plasma
Scott, C. D.↗
Observations of the infrared triplet of singly ionized calcium
Solar IR triplet of singly ionized Ca, suggesting limb darkening caused by chromospheric inhomogeneities for source function inequality
Linsky, J. L.↗
Flash photolysis of ketene and diazomethane - The production and reaction kinetics of triplet and singlet methylene
Ketene and diazomethane flash photolytic measurement of reaction rates of singlet-triplet methylene deactivation
Bass, A. M.↗
Detection and identification of triplet states of H2O by electron impact
Single to triplet transitions of water vapor as function of scattering angle in electron impact detection
Kuppermann, A.↗
Unrestricted Hartree-Fock SCF calculations on some hypothetical molecules with triplet ground states
Self consistent field /SCF/ calculations of dipyridine glyoxal and bianthrone photoproduct molecules with triplet ground state, using unrestricted Hartree-Fock theory
Phillips, D. H.↗
Calculation of quasi-static helium triplet diffuse line profiles
Calculated spectral line profiles (intensity distributions) of the helium triplet diffuse series were obtained using the quasi-static approximation for ions and electrons. In these calculations, Doppler broadening, although negligible in most of the cases, was included as a device to avoid singularities. Plots and tabulations of the calculated profiles are presented, in addition to a discussion of the computational procedure and the validity of the calculations.
Scott, C. D.↗
Physical properties of solar chromospheric plages. I - Line profiles of the CaII H, K, and infrared triplet lines.
Double pass photoelectric observations are presented of five CaII lines (H, K, 8498 A, 8542 A, and 8662 A) in a number of solar plages of different degrees of activity, quiet regions, and a sunspot. The data are compared with previous work. All five lines show increasing emission together in plages, and the least opaque of the infrared triplet lines appears to exhibit core emission prior to the more opaque members of the multiplet. The question of source function equality is considered and the differences and similarities among plage profiles and between plage and quiet profiles are shown qualitatively and quantitatively.
Shine, R. A.↗
A theoretical study of selected singlet and triplet states of CO molecule
The results of the configuration calculations of six singlet electronic states and one triplet electronic state of CO are presented. The potential energy curves, spectroscopic constants, and electron transition moments are calculated, along with electronic dipole moment functions for three states. The self consistent field and configuration calculations used to obtain the electronic wave functions are described. The theoretical results are found to be in good agreement with the experimental measurements, and in the case of the dipole moment function calculations, preferable to them.
Cooper, D. M.↗
Intensity formulas for triplet bands
Previous work in this area is surveyed and the mathematics involved in determining the quantitative intensity measurements in triplet bands is presented. Explicit expressions for the intensity distribution in the branches of the 3 Sigma-3 Pi and 1 Sigma-3Pi bands valid for all values of the coupling constant Y of the 3 Pi terms are given. The intensity distribution calculated according to the formulas given is compared with measurements of PH, 3 Pi-3 Sigma. Good quantitative agreement is obtained.
Budo, A.↗
The formation of the vinylidene radical as an intermediate in the combination of triplet methylene
The vinylidene radical (H2C = C) is proposed as an intermediate in the combination reaction of triplet methylene. The conclusion is based upon the distribution of isotopic acetylenes produced from a 1:1 mixture of CD2 and CH2. The path of the reaction and the energetics of the intermediate species are discussed.
Laufer, A. H.↗
Statistical equilibrium in cometary C2. III - Triplet-singlet, Phillips, Ballik-Ramsay, and Mulliken bands
A new series of vibrational bands is predicted which arises from transitions between the lowest electron states of the triplet and singlet states of homonuclear C2. The predictions are useful for C2 identifications and for disentangling congested low resolution spectra that characterize new observations. Predictions are also made for Mulliken, Phillips, and Ballik-Ramsay band sequences, and all calculations are made with the assumed molecular constants and computational methods of KSO-II.
Swamy, K. S. K.↗
Skylab observations of the solar O I resonance triplet
Profile variations from center to limb, as well as at different heights above the quiet solar limb, are illustrated by profile observations of the solar O I resonant triplet at 1302, 1304, and 1306 A that were obtained with the Skylab S082-B spectrograph. Since these lines share a common upper energy level, source function equality should exist for them when the lower states are populated according to their statistical weights. Profile congruency and profile inversion calculations comparisons show, however, that this is not the case, suggesting either errors in the fine structure collision rates, or the H I Ly-beta flux preferentially depopulating the 1302 A lower level, or two-dimensional transfer effects.
Roussel-Dupre, D.↗