scholarly journals Measurements of the Relaxation Kinetics of Photo-Excited Enol Form of Dibenzoylmethane

1985 ◽  
Vol 5 (3) ◽  
pp. 107-117 ◽  
Author(s):  
P. D. Yankov ◽  
S. M. Saltiel ◽  
I. V. Tomov ◽  
P. J. Markov ◽  
I. K. Petkov
Keyword(s):  
Excited State ◽  
Decay Rate ◽  
Cross Sections ◽  
Decay Rates ◽  
Enol Form ◽  
Absorption Cross ◽  
Relaxation Kinetics ◽  
Light Pulses ◽  
Kinetics Of

The decay rate of the excited state of the enol form of dibenzoylmethane (DBM) in different solvents is measured directly using nanosecond light pulses. The observed relaxation kinetics is explained by the formation of three intermediate forms of the excited cis-enol form of DBM. The decay rates of the intermediates and their absorption cross sections for λ = 266 nm are reported too.

On the optimality of optical pumping for a closed Λ-system with large decay rates of the intermediate excited state

2021 ◽  
Author(s):  
Dionisis Stefanatos ◽  
Emmanuel Paspalakis
Keyword(s):  
Optimal Control ◽  
Excited State ◽  
Decay Rate ◽  
Optimal Control Theory ◽  
Optical Pumping ◽  
Quantum Information Processing ◽  
Decay Rates ◽  
Population Transfer ◽  
Initial State ◽  
Weakly Coupled

Abstract We use optimal control theory to show that for a closed Λ-system where the excited intermediate level decays to the lower levels with a common large rate, the optimal scheme for population transfer between the lower levels is actually optical pumping. In order to obtain this result we exploit the large decay rate to eliminate adiabatically the weakly coupled excited state, then perform a transformation to the basis comprised of the dark and bright states, and finally apply optimal control to this transformed system. Subsequently, we confirm the optimality of the optical pumping scheme for the original closed Λ-system using numerical optimal control. We also demonstrate numerically that optical pumping remains optimal when the decay rate to the target state is larger than that to the initial state or the two rates are not very different from each other. The present work is expected to find application in various tasks of quantum information processing, where such systems are encountered

scholarly journals Absorption cross sections and kinetics of formation of AlO at 298 K

2017 ◽  
Vol 675 ◽  
pp. 56-62 ◽  
Author(s):  
Juan Carlos Gómez Martín ◽  
Shane M. Daly ◽  
James S.A. Brooke ◽  
John M.C. Plane
Keyword(s):  
Cross Sections ◽  
Absorption Cross ◽  
Kinetics Of Formation ◽  
Kinetics Of

NEUTRINO MASS AND MIXING: THE IMPACT OF EXCITED STATE CONTRIBUTIONS ON CAPTURE RATES OF Ga DETECTORS

1995 ◽  
Vol 10 (01) ◽  
pp. 133-143 ◽  
Author(s):  
KAMALES KAR ◽  
SRUBABATI GOSWAMI ◽  
AMITAVA RAYCHAUDHURI
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Absorption Cross ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Neutrino Mass And Mixing ◽  
Nuclear Models ◽  
The Impact ◽  
Neutrino Absorption ◽  
Capture Rates

In this paper we calculate the neutrino absorption cross-sections for the reaction 71Ga(ν, e−)71Ge using two simple nuclear models to account for the giant GT resonances. In both models the excited state contributions are found to have significant ranges of variation and affect the solar neutrino capture rates. Nonetheless, the regions in the neutrino mixing angle-mass squared difference plane allowed by the data from the Gallium detectors, when taken together with those from the Chlorine and Kamioka experiments, are found to be comparatively stable.

scholarly journals CH2OO Criegee intermediate UV absorption cross-sections and kinetics of CH2OO + CH2OO and CH2OO + I as a function of pressure

2020 ◽  
Vol 22 (17) ◽  
pp. 9448-9459 ◽  
Author(s):  
Zara S. Mir ◽  
Thomas R. Lewis ◽  
Lavinia Onel ◽  
Mark A. Blitz ◽  
Paul W. Seakins ◽  
...  
Keyword(s):  
Cross Sections ◽  
Uv Absorption ◽  
Absorption Cross ◽  
Kinetics Of

The UV absorption cross-sections of the Criegee intermediate CH2OO, and kinetics of the CH2OO self-reaction and the reaction of CH2OO with I are reported as a function of pressure at 298 K.

Excited-state Absorption Cross Sections of a Phosphine-substituted Bithiophene

2009 ◽  
Author(s):  
Timothy M. Pritchett ◽  
Jianwei Wang ◽  
Christopher M. Lawson ◽  
Qun Zhao ◽  
Gary M. Gray
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Absorption Cross
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