Results 21 to 30 of about 988,957 (292)

Luz: um raro produto de reação

Química Nova, 2011
The production of visible light by chemical reactions constitutes interesting and fascinating phenomena and several reaction mechanisms are discussed to rationalize excited state formation.
Fernando Heering Bartoloni, Luiz Francisco Monteiro Leite Ciscato, Mônica Melchioretto de Medeiros Peixoto, Ana Paula Fileno dos Santos, Cerize da Silva Santos, Sandro de Oliveira, Felipe Alberto Augusto, Ana Paula Eskildsen Pagano, Wilhelm Josef Baader, Erick Leite Bastos   +9 more
doaj   +1 more source

Resonances in Systems Involving Positrons

Atoms, 2020
When an incident particle on a target gets attached to the target, the cross-section at that energy could be much larger compared to those at other energies. This is a short-lived state and decays by emitting an electron.
Anand K. Bhatia
doaj   +1 more source

Variational Quantum Computation of Excited States [PDF]

Quantum, 2019
The calculation of excited state energies of electronic structure Hamiltonians has many important applications, such as the calculation of optical spectra and reaction rates.
Oscar Higgott, Daochen Wang, Stephen Brierley   +2 more
doaj   +1 more source

Experimental verification of minima in excited long-range Rydberg states of Rb_2 [PDF]

, 2006
Recent theoretical studies with alkali atoms A$^{\ast}$ excited to high Rydberg states predicted the existence of ultra long-range molecular bound states.
A. Gallagher, A. Omont, Cedomil Vadla, Chris H. Greene, Edward L. Hamilton, Heather Crowell, Kay Niemax, V. Eliseev   +7 more
core   +2 more sources

Spectroscopy at the two-proton drip line: Excited states in 158W

Physics Letters B, 2017
Excited states have been identified in the heaviest known even-Z N=84 isotone 158W, which lies in a region of one-proton emitters and the two-proton drip line.
D.T. Joss, R.D. Page, A. Herzán, L. Donosa, J. Uusitalo, R.J. Carroll, I.G. Darby, K. Andgren, B. Cederwall, S. Eeckhaudt, T. Grahn, P.T. Greenlees, B. Hadinia, U. Jakobsson, P.M. Jones, R. Julin, S. Juutinen, M. Leino, A.-P. Leppanen, M. Nyman, D. O'Donnell, J. Pakarinen, P. Rahkila, M. Sandzelius, J. Sarén, C. Scholey, D. Seweryniak, J. Simpson, J. Sorri   +28 more
doaj   +1 more source

Primordial gravitational waves from excited states

Journal of High Energy Physics, 2022
We show that a scalar excited state with large occupation numbers during inflation leads to an enhancement of tensor modes and a characteristic pattern of order-one oscillations in the associated stochastic gravitational wave background (SGWB) sourced ...
Jacopo Fumagalli, Gonzalo A. Palma, Sébastien Renaux-Petel, Spyros Sypsas, Lukas T. Witkowski, Cristobal Zenteno   +5 more
doaj   +1 more source

Excited-state Wigner crystals [PDF]

The Journal of Chemical Physics, 2017
Wigner crystals (WCs) are electronic phases peculiar to low-density systems, particularly in the uniform electron gas. Since its introduction in the early twentieth century, this model has remained essential to many aspects of electronic structure theory and condensed-matter physics.
Rogers, Fergus, Loos, Pierre-Francois
openaire   +3 more sources

Nucleon pairing in Sn isotopes

EPJ Web of Conferences, 2016
The systematics of excited states in Sn isotopes are discussed on basis of pairing interaction in nuclei. Nucleon paring leads to formation of excited states multiplets.
Imasheva L., Ishkhanov B., Stepanov M., Tretyakova T.   +3 more
doaj   +1 more source

Radial excitations of the decuplet baryons

European Physical Journal C: Particles and Fields, 2017
The ground and first excited states of the decuplet baryons are studied using the two-point QCD sum rule approach. The mass and residue of these states are computed and compared with the existing experimental data and other theoretical predictions.
T. M. Aliev, K. Azizi, H. Sundu
doaj   +1 more source

Hyperridge of triply excited states [PDF]

Physical Review A, 1988
We present a theory for the definition and the reliable calculation of correlated wave functions of a special class of triply excited states and for their rigorous geometrical analysis. This class is named the three-electron ionization ladder (THEIL) and refers to the simultaneous excitation of three electrons in valence states near threshold ...
Νικολαΐδης, Κλεάνθης A., Komninos, Yannis, Chrysos, M., Nicolaides, Cleanthes A.   +3 more
openaire   +3 more sources