Results 301 to 310 of about 259,290 (345)
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Chemical Physics Letters, 1980
The 4067 A line of the krypton-ion laser covers two transitions in the BO+u-X O+g system of 130Te2, R(36) in the 16-0 band and R(172) in the 18-0 band. Subsequent fluorescence has been recorded by Fourier transform spectrometry in the range 5900 to 15000 cm−1. Many transitions, with v'' in the range 0 to 47, have been assigned to a new system, B O+u-b1
C. Effantin +4 more
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The 4067 A line of the krypton-ion laser covers two transitions in the BO+u-X O+g system of 130Te2, R(36) in the 16-0 band and R(172) in the 18-0 band. Subsequent fluorescence has been recorded by Fourier transform spectrometry in the range 5900 to 15000 cm−1. Many transitions, with v'' in the range 0 to 47, have been assigned to a new system, B O+u-b1
C. Effantin +4 more
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Dimethylcarbene: A Singlet Ground State?
Journal of the American Chemical Society, 1995Ab initio molecular electronic structure theory has been used to determine the energy separation between the lowest {sup 3}B{sub 1} and {sup 1}A states of dimethylcarbene. The geometries of both states have been optimized at the self-consistent Field(SCF) and the single and double excitation configurationinteraction (CISD) levels of theory using ...
Claude A. Richards +3 more
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Magnetism in singlet ground states
Hyperfine Interactions, 1997The spin‐gap phenomenon is a key characteristic of high Tc superconducting cuprates, whose experimental results are summarized and discussed in the context of the slave‐boson mean field theory of the extended t–J model. It is seen that there exists satisfactory agreement between theory and experiments in bilayer cuprates.
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AIP Conference Proceedings, 1973
Magnetic systems in which the single ion ground state is a singlet may exhibit a soft mode phase transition corresponding to a polarization instability of the ground state wavefunction. In this article, theory and experiment for such systems is reviewed and discussed in the context of rare earth metals and intermetallic compounds.
Robert J. Birgeneau +3 more
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Magnetic systems in which the single ion ground state is a singlet may exhibit a soft mode phase transition corresponding to a polarization instability of the ground state wavefunction. In this article, theory and experiment for such systems is reviewed and discussed in the context of rare earth metals and intermetallic compounds.
Robert J. Birgeneau +3 more
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Singlet and triplet states of BF
Journal of Molecular Spectroscopy, 1988Abstract High-resolution spectra of three singlet and two triplet transitions of BF have been observed in the near infrared. Accurate rotational constants are given for the seven electronic states involved.
H. Bredohl +3 more
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The lowest singlet state of dibenzofuran
Journal of Molecular Spectroscopy, 1973Abstract The vapor absorption of dibenzofuran has been reexamined, and the spectrum and lifetime of the vapor fluorescence have been measured. Also measured were the polarized absorption in durene host and the depolarized absorption, fluorescence, and phosphorescence in cyclododecane host at 4 K.
A.R Lacey, A.E.W Knight, I.G Ross
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Singlet state symmetries of diphenylacetylene
Chemical Physics, 1974Abstract Polarized reflection spectra of the (001) face of diphenylacetylene single cyrstals have been measured. Analysis of the corresponding absorption spectra obtained by Krames-Kronig analysis yields the excited state symmetries of five strong bands in the wavelength rage 3000 A to 1300 A.
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The zwitterionic singlet excited state of ethylene as a singlet methylene dimer
Chemical Physics Letters, 1980Abstract The potential hole of the lowest singlet excited-state potential surface of ethylene is explored through non-empirical double zeta calculations. In these highly unsymmetrical geometries the closed-shell SCF description is relevant and further extensive Cl brings only small geometry changes. The negative center is strongly pyramidalized.
Georges Trinquier, Jean-Paul Malrieu
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Coupled double triplet state in singlet fission
Physical Chemistry Chemical Physics, 2018The highly unusual state, 1(TT), is a coupled, double triplet state that has recently garnered significant attention.
Hyungjun Kim, Paul M. Zimmerman
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2017
Isolated pairs of spin-1/2 nuclei can be prepared in a singlet state configuration that is immune to intrapair dipole–dipole relaxation, often the main source for the longitudinal magnetization decay constant T1. Because of this property singlet states can hold polarization for much longer than T1.
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Isolated pairs of spin-1/2 nuclei can be prepared in a singlet state configuration that is immune to intrapair dipole–dipole relaxation, often the main source for the longitudinal magnetization decay constant T1. Because of this property singlet states can hold polarization for much longer than T1.
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