Exotic structure of the third excited state in 21Na

2005 ◽  
Vol 50 (23) ◽  
pp. 2677
Author(s):  
Xihan LI
Keyword(s):  
Excited State ◽  
The Third

Near-Infrared Combination and Overtone Bands of CH in CHX3, CHX2—CHX2, and CHX2—CX2—CHX2

2005 ◽  
Vol 59 (11) ◽  
pp. 1393-1398 ◽  
Author(s):  
Reikichi Iwamoto ◽  
Akishi Nara ◽  
Toshihiko Matsuda
Keyword(s):  
Excited State ◽  
Near Infrared ◽  
Present Report ◽  
Spectral Characteristics ◽  
The Other ◽  
Coupled Modes ◽  
Third Order ◽  
The Third ◽  
Combination Bands ◽  
Deformation Modes

In the present report we studied spectral characteristics of the near-infrared combination and overtone bands of CH vibrations of a CH sequence. The near-infrared bands of the CH in CHX3 (X, halogen), which were interpreted in terms of the CH stretching and CH deformation fundamentals without any ambiguity, typically showed how the frequency and intensity of a combination or an overtone depend on the vibrational excited state. In the CH–C–CH of CHX2CX2CHX2, the vibrations of one CH are isolated from those of the other CH, and the combination and overtone bands were similarly interpreted as those of the CH, although each of the combination bands was split into two because of non-degeneracy of the CH deformation. In the CH–CH of CHX2CHX2, the CH deformations only have coupled modes. The first combination showed four narrowly separate bands, which were reasonably interpreted on the basis of the CH stretching and the coupled CH deformation modes. We demonstrated that the first combination of coupled modes as well as the combination of up to, at least, the third order of isolated modes have the nature of the characteristic bands.

Spontaneous Tunnel Transitions Induced by Redistribution of Trapped Electrons over Impurity Centers

1983 ◽  
Vol 38 (9) ◽  
pp. 959-962
Author(s):  
A. A. Berezin
Keyword(s):  
Excited State ◽  
Charge State ◽  
Ground State ◽  
Low Energy ◽  
Energy Photon ◽  
Impurity Site ◽  
The Third ◽  
Tunnel Transition ◽  
Extra Electron ◽  
Impurity Centers

Abstract A system of polyvalent impurity centers in a semiconductor (i.e. Au-centers in Si) is con-sidered. The ground state of the impurity pair Au-(a) + Au° (b), where an extra electron is localized on the site a, may be turned into an excited state due to a change of the charge state of a third nearby impurity site. This happens because of different shifts of the Au--level at sites a and b due to their different distances from the third center. As a result, the original pair is able to reach a new ground state Au° (a) + Au- (b) through a slow spontaneous tunnel transition. The probability of this transition, when it is accompanied by an emission of a low energy photon, is calculated explicitly.

Excited state dynamics of the third-order nonlinear optical response in diphenylhexatriene

1993 ◽  
Author(s):  
D. C. Rodenberger ◽  
Weidong Chen ◽  
Rui-Fang Shi ◽  
Qihou L. Zhou ◽  
Anthony F. Garito
Keyword(s):  
Excited State ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Third Order ◽  
Excited State Dynamics ◽  
The Third

scholarly journals Copper and sulphur depth profile in patina layers using NRA and RBS

2019 ◽  
Vol 11 ◽  
Author(s):  
G. Kalliabakos ◽  
S. Kossionides ◽  
P. Misailides ◽  
C. T. Papadopoulos ◽  
R. Vlastou
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Ground State ◽  
Depth Distribution ◽  
Nuclear Reaction Analysis ◽  
Beam Direction ◽  
The Third ◽  
First Excited State ◽  
Γ Ray

A combination of nuclear reaction analysis (NRA) and Rutherford backscattering spectroscopy (RBS) were utilized in order to obtain information on the depth distribution of sulphur and copper in artificially produced and natural patina layers. The copper profiling was performed by using the reaction 63Cu(p,p'y)6 3Cu and detecting the 1327 keV γ-ray deexciting the third excited state to the ground state of 6 3Cu produced. For the determination of sulfur the 2230 keV γ-ray was used, deexciting the first excited state to the ground state of 32S formed through the reaction 3 2S(p,p'y)3 2S, which exhibits three sharp resonances at projectile energies 3.094, 3.195 and 3.379 MeV. The relevant cross-sections were measured in the energy range between 3.0 and 3.7 MeV in steps of 20 keV at 125° to the incident proton beam direction. Supporting information on the depth distribution of oxygen and the other elements of the patina samples was obtained by p-RBS (Ep = 1.5 MeV; θ = 160°).

scholarly journals Determination of Sulfur and Copper Profile with nuclear reactions

2019 ◽  
Vol 10 ◽  
pp. 1
Author(s):  
S. Kossionides ◽  
G. Kaliambakos ◽  
R. Vlastou ◽  
C. T. Papadopoulos
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Ground State ◽  
Nuclear Reactions ◽  
Nuclear Reaction Analysis ◽  
The Third ◽  
First Excited State ◽  
Γ Ray ◽  
Resonant Reaction

The concentration and depth profile of Cu and S in patinna samples have been determined by using Nuclear Reaction Analysis (NRA) and Rutherford Backscattering Spectroscopy (RBS). For the NRA the differential cross section was mesaured for the 1327 keV 7-ray deexciting the third excited state to the ground state of 6 3Cu through the reaction 63Cu(p,p'7), as well as, for the 2230 keV γ-ray deexciting the first excited state to the ground state through the resonant reaction 32S(p,p'7). The mesaurements of both excitation functions were performed in the energy range 3.0 - 3.7 MeV in 20 keV steps and at an angle of 125°.

scholarly journals Nonlinear Spectroscopy in the Condensed Phase: The Role of Duschinsky Rotations and Third Order Cumulant Contributions

2020 ◽  
Author(s):  
Tim Zuehlsdorff ◽  
Hanbo Hong ◽  
Liang Shi ◽  
Christine Isborn
Keyword(s):  
Excited State ◽  
Condensed Phase ◽  
Nonlinear Optical ◽  
Order Term ◽  
Optical Spectra ◽  
Cumulant Expansion ◽  
Third Order ◽  
The Third ◽  
Mode Mixing

First-principles modeling of nonlinear optical spectra in the condensed phase is highly challenging because both environment and vibronic interactions can play a large role in determining spectral shapes and excited state dynamics. Here, we compute two dimensional electronic spectroscopy (2DES) signals based on a cumulant expansion of the energy gap fluctuation operator, with a specific focus on analyzing mode mixing effects introduced by the Duschinsky rotation and the role of the third order term in the cumulant expansion for both model and realistic condensed phase systems. We show that for a harmonic model system, the third order cumulant correction captures effects introduced by a mismatch in curvatures of ground and excited state potential energy surfaces, as well as effects of mode mixing. We also demonstrate that 2DES signals can be accurately reconstructed from purely classical correlation functions using quantum correction factors. We then compute nonlinear optical spectra for the Nile red and Methylene blue chromophores in solution, assessing the third order cumulant contribution for realistic systems. We show that the third order cumulant correction is strongly dependent on the treatment of the solvent environment, revealing the interplay between environmental polarization and the electronic-vibrational coupling.

scholarly journals Nonlinear Spectroscopy in the Condensed Phase: The Role of Duschinsky Rotations and Third Order Cumulant Contributions

2020 ◽  
Author(s):  
Tim Zuehlsdorff ◽  
Hanbo Hong ◽  
Liang Shi ◽  
Christine Isborn
Keyword(s):  
Excited State ◽  
Condensed Phase ◽  
Nonlinear Optical ◽  
Order Term ◽  
Optical Spectra ◽  
Cumulant Expansion ◽  
Third Order ◽  
The Third ◽  
Mode Mixing

First-principles modeling of nonlinear optical spectra in the condensed phase is highly challenging because both environment and vibronic interactions can play a large role in determining spectral shapes and excited state dynamics. Here, we compute two dimensional electronic spectroscopy (2DES) signals based on a cumulant expansion of the energy gap fluctuation operator, with a specific focus on analyzing mode mixing effects introduced by the Duschinsky rotation and the role of the third order term in the cumulant expansion for both model and realistic condensed phase systems. We show that for a harmonic model system, the third order cumulant correction captures effects introduced by a mismatch in curvatures of ground and excited state potential energy surfaces, as well as effects of mode mixing. We also demonstrate that 2DES signals can be accurately reconstructed from purely classical correlation functions using quantum correction factors. We then compute nonlinear optical spectra for the Nile red and Methylene blue chromophores in solution, assessing the third order cumulant contribution for realistic systems. We show that the third order cumulant correction is strongly dependent on the treatment of the solvent environment, revealing the interplay between environmental polarization and the electronic-vibrational coupling.

Against the NEER principle: The third type of photochromism for GFP chromophore derivatives

2021 ◽  
Author(s):  
Jun-Wei Liao ◽  
Robert Sung ◽  
Kuangsen Sung
Keyword(s):  
Excited State ◽  
Green Fluorescent Protein ◽  
Proton Transfer ◽  
Fluorescent Protein ◽  
Fluorescent Proteins ◽  
The Third ◽  
Excited State Proton Transfer ◽  
Gfp Chromophore ◽  
Green Fluorescent

Photochromism is the heart of photochromic fluorescent proteins. Excited-state proton transfer (ESPT) is the major photochromism for green fluorescent protein (GFP) and Z-E photoisomerization through τ-torsion is the major photochromism...

Exotic structure of the third excited state in21Na

2005 ◽  
Vol 50 (23) ◽  
pp. 2677-2680
Author(s):  
Li Xihan ◽  
Liang Yujie ◽  
Deng Fuguo ◽  
Liu Zuhua ◽  
Zhou Hongyu
Keyword(s):  
Excited State ◽  
The Third
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