Electronic Angular Momentum Effects in the Photophysical Behavior of Fullerenes

1994 ◽  
Vol 359 ◽  
Author(s):  
S. M. Argentine ◽  
A. H. Francis
Keyword(s):  
Dielectric Constant ◽  
Angular Momentum ◽  
Emission Spectrum ◽  
Spectral Sensitivity ◽  
Free Electron ◽  
Spherical Symmetry ◽  
Electron Orbital ◽  
Solvent Dependence ◽  
Solvent Environment ◽  
Photophysical Behavior

ABSTRACTThe intensity of the electronic origin in the emission spectrum of C70 exhibits a strong solvent sensitivity. The intensity of this peak increases relative to the vibronic features as the dielectric constant of the solvent increases. This solvent dependence is explained by an extension of Platt's Perimeter Free Electron Orbital model. The fullerenes, in particular C60 and C70, possess a nearly spherical symmetry that gives rise to the presence of significant electronic orbital angular momentum. The unexpected spectral sensitivity is shown to arise from quenching of the electronic angular momentum by the solvent environment.

scholarly journals Efficient sorting of free electron orbital angular momentum

2017 ◽  
Vol 19 (2) ◽  
pp. 023053 ◽  
Author(s):  
Benjamin J McMorran ◽  
Tyler R Harvey ◽  
Martin P J Lavery
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Free Electron ◽  
Electron Orbital

The transmission of polar effects. Part VII. A proton magnetic resonance spectra study of substituted mesitylenes, durenes, anthracenes, and triptycenes

1968 ◽  
Vol 46 (24) ◽  
pp. 3903-3908 ◽  
Author(s):  
Keith Bowden ◽  
J. G. Irving ◽  
M. J. Price
Keyword(s):  
Dielectric Constant ◽  
Free Energy ◽  
Carbon Tetrachloride ◽  
Field Effect ◽  
Proton Magnetic Resonance ◽  
Chemical Shifts ◽  
Linear Free Energy ◽  
Solvent Dependence ◽  
Similar Dependence ◽  
Energy Relations

The chemical shifts of the ring protons in a series of monosubstituted mesitylenes and durenes, and of the 10-protons of a series of 9-substituted triptycenes and anthracenes have been measured in dimethyl sulfoxide, acetone, 2-methoxyethanol, and carbon tetrachloride. The solvent dependence of the substituent chemical shifts has been analyzed by linear free energy relations. The systems all show similar dependence which increases with increasing dielectric constant of the solvent. This does not result from the field effect being transmitted through the medium, but appears to arise from the formation of a hydrogen-bonded interaction between the solvent and the hydrogen of the solute. The substituent chemical shifts appear to arise from contributions from substituent field, resonance, magnetic anisotropy, and solvent effects.

scholarly journals Effects of Rotation on Helium Accreting White Dwarf

2004 ◽  
Vol 215 ◽  
pp. 571-572 ◽  
Author(s):  
S.-C. Yoon ◽  
N. Langer
Keyword(s):  
Angular Momentum ◽  
White Dwarf ◽  
Spherical Symmetry ◽  
Binary Systems ◽  
Close Binary ◽  
Type Ia Supernovae ◽  
Classical Studies ◽  
Type Ia ◽  
Effects Of Rotation ◽  
Ia Supernovae

Classical studies of accreting white dwarfs have assumed spherical symmetry. However, it is believed that in close binary systems the transfered matter carries angular momentum to spin up the accreting star. Here, we present preliminary results of CO white dwarf models which accrete helium rich matter with effects of rotation considered, in the context of the Sub-Chandrasekhar mass scenario for Type Ia supernovae.

scholarly journals Electron Orbital Angular Momentum Transfer to Nanoparticle Plasmon Modes

2013 ◽  
Vol 19 (S2) ◽  
pp. 1186-1187
Author(s):  
T.R. Harvey ◽  
J.S. Pierce ◽  
T.S. Yahn ◽  
P.A. Ercius ◽  
B.J. McMorran
Keyword(s):  
Angular Momentum ◽  
Momentum Transfer ◽  
Orbital Angular Momentum ◽  
Angular Momentum Transfer ◽  
Electron Orbital ◽  
Plasmon Modes

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Multi-colour pulses from seeded free-electron-lasers: towards the development of non-linear core-level coherent spectroscopies

2014 ◽  
Vol 171 ◽  
pp. 487-503 ◽  
Author(s):  
Filippo Bencivenga ◽  
Flavio Capotondi ◽  
Francesco Casolari ◽  
Francesco Dallari ◽  
Miltcho B. Danailov ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Core Level ◽  
Wave Mixing ◽  
Free Electron Lasers ◽  
Diffraction Experiment ◽  
X Ray ◽  
Ultrafast Science

We report on new opportunities for ultrafast science thanks to the use of two-colour extreme ultraviolet (XUV) pulses at the FERMI free electron laser (FEL) facility. The two pulses have been employed to carry out a pioneering FEL-pump/FEL-probe diffraction experiment using a Ti target and tuning the FEL pulses to the M2/3-edge in order to explore the dependence of the dielectric constant on the excitation fluence. The future impact that the use of such a two-colour FEL emission will have on the development of ultrafast wave-mixing methods in the XUV/soft X-ray range is addressed and discussed.

scholarly journals Hawking Non-thermal and Purely Thermal Radiations of Rotating Black Hole in Anti-de Sitter Space Time by Hamilton-Jacobi Method

2018 ◽  
Vol 37 ◽  
pp. 99-109
Author(s):  
M Ilias Hossain
Keyword(s):  
Black Hole ◽  
Angular Momentum ◽  
Emission Spectrum ◽  
Hawking Radiation ◽  
De Sitter Space ◽  
Space Time ◽  
Jacobi Method ◽  
De Sitter ◽  
Tunneling Method ◽  
Thermal Radiations

We have explored Hawking non-thermal and purely thermal radiations of Kerr-anti-de Sitter (KAdS) black hole using massive particles tunneling method by taking into account the space time background as dynamical, energy and angular momentum as conserved incorporating the selfgravitation effect of the emitted particles. The results we have obtained for KAdS black hole have shown that the tunneling rates are related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum and also the obtaining results for KAdS black hole are accordant with Parikh and Wilczek’s opinion and gives a correction to the Hawking radiation of KAdS black hole.GANIT J. Bangladesh Math. Soc.Vol. 37 (2017) 99-109

scholarly journals A Paediatric Pulmonary Electron based Magnetic Resonance Imaging Technique Exploiting Electron Orbital Angular Momentum Spin and the ‘Celalettin Tunnel Conjecture’

2020 ◽  
pp. 1-5
Author(s):  
Metin Celalettin ◽  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Angular Momentum ◽  
Magnetic Resonance ◽  
Severe Acute Respiratory Syndrome ◽  
Orbital Angular Momentum ◽  
Imaging Technique ◽  
Electric Polarization ◽  
Resonance Imaging ◽  
Electron Orbital ◽  
Magnetic Resonance Imaging Mri

The ‘Celalettin-Field Quantum Observation Tunnel’ (Celalettin Tunnel) is a quantum observation technique. It is within a pneumatic manifold of Euclidean space where the randomness of particle Orbital Angular Momentum (OAM) is mitigated via electric polarization. It is described by the ‘Celalettin Tunnel Conjecture’. ‘Celalettin Tunnel Conjecture’ can be exploited to propose a paediatric ‘Magnetic Resonance Imaging’ (MRI) machine in pulmonary diagnostics for Severe Acute Respiratory Syndrome Coronavirus-2’ in paediatric patients to avoid the need to administer General Anaesthesia

Improvements in the Spherical Collapse Model and Dark Energy Cosmologies

2014 ◽  
Vol 23 (3-4) ◽  
Author(s):  
A. Del Popolo
Keyword(s):  
Shear Stress ◽  
Angular Momentum ◽  
Dark Energy ◽  
Spherical Symmetry ◽  
Linear Density ◽  
Spherical Collapse ◽  
Collapse Model ◽  
Density Threshold ◽  
Stress Influence

AbstractIn the present paper, we study how the effects of deviations from spherical symmetry of a system, produced by angular momentum, and shear stress, influence typical parameters of the spherical collapse model, like the linear density threshold for collapse of the non-relativistic component (

scholarly journals Gain of electron orbital angular momentum in a direct laser acceleration process

2020 ◽  
Vol 101 (5) ◽  
Author(s):  
R. Nuter ◽  
Ph. Korneev ◽  
E. Dmitriev ◽  
I. Thiele ◽  
V. T. Tikhonchuk
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Acceleration Process ◽  
Electron Orbital ◽  
Direct Laser ◽  
Laser Acceleration
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