The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
Yusaku Ikegami - One of the best experts on this subject based on the ideXlab platform.
-
Structural effects on the Radiationless Transition from the T1 states of tropone derivatives
The Journal of Physical Chemistry, 1993Co-Authors: Tadaaki Ikoma, Kimio Akiyama, Shozo Tero-kubota, Yusaku IkegamiAbstract:The T 1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1×10 5 s -1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower Radiationless decay rate (
-
structural effects on the Radiationless Transition from the t1 states of tropone derivatives
The Journal of Physical Chemistry, 1993Co-Authors: Tadaaki Ikoma, Kimio Akiyama, Shozo Terokubota, Yusaku IkegamiAbstract:The T 1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1×10 5 s -1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower Radiationless decay rate (<30 S -1 ) than tropone. The mechanism of the fast Radiationless Transition between the T 1 and S 0 states of tropone has been discussed
J. P. Marques - One of the best experts on this subject based on the ideXlab platform.
-
Relativistic M-subshell Radiationless Transition probabilities and energies for Zn, Cd and Hg
Atomic Data and Nuclear Data Tables, 2014Co-Authors: J. M. Sampaio, Paul Indelicato, F. Parente, J. P. MarquesAbstract:Abstract Theoretical calculations of Radiationless Transition probabilities and energies for M-subshell vacancies in Zn, Cd, and Hg are tabulated using the Dirac–Fock method. Transition probabilities between an initial vacancy state and a final two-vacancies state are presented for each initial and final atomic angular momentum quantum number. Calculations were performed in the single configuration approach with the Breit interaction, self-energy and (Uehling) vacuum polarization corrections included in the self-consistent method. Higher-order retardation corrections and QED effects were also included as perturbations.
-
relativistic 2s1 2 l1 atomic subshell Radiationless Transition probabilities for yb and hg
Atomic Data and Nuclear Data Tables, 2000Co-Authors: José Paulo Santos, J. P. Marques, F. Parente, Paul Indelicato, J. P. DesclauxAbstract:Radiationless Transition rates to L1 vacancy states have been calculated ab initio in the Dirac–Fock approximation. The calculations include quantum-electrodynamic corrections. Results in the jj coupling scheme for all possible L1 Transitions are tabulated for elements Yb and Hg.
-
RELATIVISTIC 2S1/2 (L1) ATOMIC SUBSHELL Radiationless Transition PROBABILITIES FOR Yb AND Hg
Atomic Data and Nuclear Data Tables, 2000Co-Authors: José Paulo Santos, J. P. Marques, F. Parente, Paul Indelicato, J. P. DesclauxAbstract:Radiationless Transition rates to L1 vacancy states have been calculated ab initio in the Dirac–Fock approximation. The calculations include quantum-electrodynamic corrections. Results in the jj coupling scheme for all possible L1 Transitions are tabulated for elements Yb and Hg.
F. Parente - One of the best experts on this subject based on the ideXlab platform.
-
Relativistic M-subshell Radiationless Transition probabilities and energies for Zn, Cd and Hg
Atomic Data and Nuclear Data Tables, 2014Co-Authors: J. M. Sampaio, Paul Indelicato, F. Parente, J. P. MarquesAbstract:Abstract Theoretical calculations of Radiationless Transition probabilities and energies for M-subshell vacancies in Zn, Cd, and Hg are tabulated using the Dirac–Fock method. Transition probabilities between an initial vacancy state and a final two-vacancies state are presented for each initial and final atomic angular momentum quantum number. Calculations were performed in the single configuration approach with the Breit interaction, self-energy and (Uehling) vacuum polarization corrections included in the self-consistent method. Higher-order retardation corrections and QED effects were also included as perturbations.
-
dirac fock Transition energies and radiative and Radiationless Transition probabilities for ar9 to ar16 ion levels with k shell holes
Atomic Data and Nuclear Data Tables, 2001Co-Authors: A M Costa, F. Parente, M C Martins, J P Santos, P IndelicatoAbstract:Abstract Transition energies and radiative and Radiationless Transition rates for argon ions Ar 9+ to Ar 16+ have been calculated in the Dirac–Fock approximation, including quantum-electrodynamic corrections, for deexcitation to the ground configuration of all levels in the 1 s 2 s 2 2 p n ( n =0,…,6), 1 s 2 s 2 p n ( n =1,…,6), and 1 s 2 p configurations. These data are of interest in the interpretation of x-ray spectra originating from plasmas in tokamaks, ion sources, and ion traps and from astrophysical plasmas.
-
relativistic 2s1 2 l1 atomic subshell Radiationless Transition probabilities for yb and hg
Atomic Data and Nuclear Data Tables, 2000Co-Authors: José Paulo Santos, J. P. Marques, F. Parente, Paul Indelicato, J. P. DesclauxAbstract:Radiationless Transition rates to L1 vacancy states have been calculated ab initio in the Dirac–Fock approximation. The calculations include quantum-electrodynamic corrections. Results in the jj coupling scheme for all possible L1 Transitions are tabulated for elements Yb and Hg.
-
RELATIVISTIC 2S1/2 (L1) ATOMIC SUBSHELL Radiationless Transition PROBABILITIES FOR Yb AND Hg
Atomic Data and Nuclear Data Tables, 2000Co-Authors: José Paulo Santos, J. P. Marques, F. Parente, Paul Indelicato, J. P. DesclauxAbstract:Radiationless Transition rates to L1 vacancy states have been calculated ab initio in the Dirac–Fock approximation. The calculations include quantum-electrodynamic corrections. Results in the jj coupling scheme for all possible L1 Transitions are tabulated for elements Yb and Hg.
Tadaaki Ikoma - One of the best experts on this subject based on the ideXlab platform.
-
Structural effects on the Radiationless Transition from the T1 states of tropone derivatives
The Journal of Physical Chemistry, 1993Co-Authors: Tadaaki Ikoma, Kimio Akiyama, Shozo Tero-kubota, Yusaku IkegamiAbstract:The T 1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1×10 5 s -1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower Radiationless decay rate (
-
structural effects on the Radiationless Transition from the t1 states of tropone derivatives
The Journal of Physical Chemistry, 1993Co-Authors: Tadaaki Ikoma, Kimio Akiyama, Shozo Terokubota, Yusaku IkegamiAbstract:The T 1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1×10 5 s -1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower Radiationless decay rate (<30 S -1 ) than tropone. The mechanism of the fast Radiationless Transition between the T 1 and S 0 states of tropone has been discussed
Andrea Peluso - One of the best experts on this subject based on the ideXlab platform.
-
The temperature dependence of Radiationless Transition rates from ab initio computations.
Physical chemistry chemical physics : PCCP, 2011Co-Authors: Raffaele Borrelli, Andrea PelusoAbstract:The calculation of Radiationless Transition rates and of their temperature dependence from first principles is addressed by combining reliable electronic computations of the normal modes of the two electronic states with Kubo's generating function approach for the evaluation of the Franck–Condon weighted density of states. The whole sets of normal modes of the involved cofactors have been employed, taking into account the effects of nuclear equilibrium position displacements, of vibrational frequency changes, and of mixing of the normal modes. Application to the case of the elementary electron transfer step between bacteriopheophytin and ubiquinone cofactors of bacterial photosynthetic reaction centers yields a temperature dependence of the electron transfer rates in very good agreement with the experimental data.