نتایج جستجو برای: excited state
تعداد نتایج: 878944 فیلتر نتایج به سال:
From the accumulated results of several research groups over the last 25 years, it is clear that photoinduced electron-transfer reactions have significantly broadened the scope of organic photochemistry.1 The fundamental mechanistic principle is that when quenching of an excited state via electron transfer is sufficiently exothermic, the reaction occurs at or close to the diffusion-controlled l...
L. G. Sobotka,1 W. W. Buhro,1 R. J. Charity,1 J. M. Elson,1 M. F. Jager,1 J. Manfredi,1 M. H. Mahzoon,1 A. M. Mukhamedzhanov,2 V. Eremenko,2 M. McCleskey,2 R. G. Pizzone,2,* B. T. Roeder,2 A. Spiridon,2 E. Simmons,2 L. Trache,2,† M. Kurokawa,3 and P. Navrátil4 1Departments of Chemistry and Physics, Washington University, St. Louis, Missouri 63130, USA 2Cyclotron Institute, Texas A&M University,...
By Florian Libisch, Jin Cheng, and Emily A. Carter3,∗ 1 Department for Mechanical and Aerospace Engineering, Princeton University, Engineering Quadrangle, Olden Street, NJ, 08540 Princeton, USA 2 Department of Chemistry, Princeton University, Washington Road, NJ, 08544 Princeton, USA 3 Department for Mechanical and Aerospace Engineering, Program in Applied and Computational Mathematics, and And...
A recent paper claims that the well known Cowling ‘anti-dynamo’ theorem is a “misconception”, and that a simple axisymmetric sunspot model constitutes a counter example. We do not believe these claims to have been substantiated.
The Naruse hook-length formula is a recent general formula for the number of standard Young tableaux of skew shapes, given as a positive sum over excited diagrams of products of hook-lengths. In [MPP1] we gave two different q-analogues of Naruse’s formula: for the skew Schur functions, and for counting reverse plane partitions of skew shapes. In this paper we give an elementary proof of Naruse’...
The cross sections for the stripping of two correlated nucleons from light and medium-mass nuclei are considered. Such reactions are of interest both as a means for populating and identifying low-lying excited states of very exotic nuclear species and as a potential direct spectroscopic probe of two-nucleon correlations in such systems. A calculation scheme that combines the full shell model tw...
General Aspects Determination of characteristic fluorescence parameters i.e. spectral properties, quantum yields, polarizations, and lifetimes, is important in the study of excited states of atoms, molecules, and crystals and also for diagnostic purposes in the physical, chemical, biological, and medical sciences. The appeal of fluorescence methodologies lies in their intrinsic sensitivity and ...
We report elastic and electronically inelastic cross sections for low-energy electron scattering by pentafluoroethane, C2HF5 . Our calculations were performed using the Schwinger multichannel method. For elastic scattering, we calculated integral, differential, and momentum transfer cross sections for energies from 5 to 50 eV. In the inelastic case, we obtained integral and differential cross s...
We study the ground and first excited states of nucleons in a chiral quark-diquark model. We include two quark-diquark channels of the scalar-isoscalar and axial-vector-isovector types for the nucleon states. The diquark correlation violating the spin-flavor SU(4)SF symmetry allows to treat the two quark-diquark channels independently. Hence the two states appear as the superpositions of the tw...
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