Results 191 to 200 of about 255,693 (225)
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State-resolved thermalization of singlet and mixed singlet-triplet states of CH2
The Journal of Chemical Physics, 2006The role of mixed states in the collision-induced thermalization, intersystem crossing, and reactive loss of CH2 (ãA11) has been monitored using Doppler-resolved transient frequency modulation absorption spectroscopy. Singlet CH2 is produced in a hot initial distribution of translation and rotational energy states in the 308nm photodissociation of ...
Anatoly V, Komissarov +3 more
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Triplet Pair States in Singlet Fission
Chemical Reviews, 2019This account aims at providing an understanding of singlet fission, i.e., the photophysical process of a singlet state ( S1) splitting into two triplet states (2 × T1) in molecular chromophores. Since its discovery 50 years ago, the field of singlet fission has enjoyed rapid expansion in the past 8 years.
Kiyoshi Miyata +3 more
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Quantum beats in cyanogen from singlet/singlet and singlet/triplet superposition states
The Journal of Chemical Physics, 1996Fluorescence quantum beats, observed among hyperfine substates of the N=8, 10, 15, 18, 19, 22, and 38 rotational levels of the 41 Ã(1Σ−u) state of C2N2, are discussed. The Zeeman splittings of some beats, for N=8, 19, and 22, are too small to arise from the spin–orbit coupling of a singlet/triplet pair of states, and are attributed to singlet/singlet ...
Naoki Hemmi, Terrill A. Cool
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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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Density matrix tomography of singlet states
Journal of Magnetic Resonance, 2010First direct and quantitative study of singlet states using density matrix tomography is reported. A robust scheme for the tomography of a general density matrix of two spin 1/2 nuclei is introduced for this purpose. The study is carried out at different spin-lock conditions and the results are compared.
Soumya Singha, Roy, T S, Mahesh
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Paramagnetic relaxation of nuclear singlet states
Physical Chemistry Chemical Physics, 2011Nuclear singlet states often display lifetimes that are much longer than conventional nuclear spin relaxation times. Here we investigate the effect of dissolved paramagnetic species on the singlet relaxation of proton pairs in solution. We find a linear correlation between the singlet relaxation rate constant T and the longitudinal relaxation rate ...
Tayler, Michael C.D., Levitt, Malcolm H.
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REMPI Spectroscopy of SO Singlet States
Journal of Molecular Spectroscopy, 1998Three newly found vibrational levels at energies Te(v) = 45127.88(3), 51900.40(4), and 52604.95(3) cm-1 allow the first application of resonance-enhanced multiphoton ionization for detecting the SO radical in its low-energy singlet states, a1Delta and b1Sigma+.
, Speth, , Braatz, , Tiemann
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The Journal of Chemical Physics, 2000
The potential curves of low-lying singlet states of Be2 are computed in the hierarchy of coupled-cluster (CC) models: CCS, CC2, CCSD, and CC3 from the ground-state energy and linear response excitation energies. The results are compared with full configuration interaction (FCI) values.
Pecul, Magdalena +3 more
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The potential curves of low-lying singlet states of Be2 are computed in the hierarchy of coupled-cluster (CC) models: CCS, CC2, CCSD, and CC3 from the ground-state energy and linear response excitation energies. The results are compared with full configuration interaction (FCI) values.
Pecul, Magdalena +3 more
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Singlet Rydberg states of ethylene
The Journal of Chemical Physics, 1977A configuration interaction scheme is employed to calculate all n=3 Rydberg states of ethylene derived from the excitation of a π electron. This scheme is designed to account for the small amount of correlation energy of the Ryberg electron and to facilitate calculation of term values from a corresponding calculation on the positive ion.
Larry E. McMurchie, Ernest R. Davidson
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