The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
V. R. Shaginyan - One of the best experts on this subject based on the ideXlab platform.
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Proton Single Particle Energy Shifts due to Coulomb Correlations
International Journal of Modern Physics B, 2001Co-Authors: Aurel Bulgac, V. R. ShaginyanAbstract:A theoretically consistent approach to the calculation of the Coulomb Energy of nuclei is presented. New contributions to the single-Particle energies are taken into account. We show that the interplay between the Coulomb interaction and the strong interaction leads to an upward shift of the proton single-Particle levels, affecting the position of the calculated proton drip line. The same contributions are responsible for significant corrections to the mass difference of the mirror nuclei (Nolen-Schiffer anomaly) and to the effective proton mass.
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Proton single-Particle Energy shifts due to Coulomb correlations
Physics Letters B, 1999Co-Authors: Aurel Bulgac, V. R. ShaginyanAbstract:Abstract A theoretically consistent approach to the calculation of the Coulomb correlation corrections to the single-Particle energies is presented. New contributions to the single-Particle energies previously overlooked in the literature are now identified and taken into account. We show that the interplay between the Coulomb interaction and the strong interaction, which is enhanced in the nuclear surface, leads to an upward shift of the proton single-Particle levels. This shift affects the position of the calculated proton drip line, a shift towards decreasing Z . We describe briefly a similar mechanism which is at work for neutron levels. The same mechanism is responsible for significant corrections to the mass difference of the mirror nuclei (Nolen–Schiffer anomaly) and to the effective proton mass.
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Proton single-Particle Energy shifts due to Coulomb correlations
Physics Letters B, 1999Co-Authors: Aurel Bulgac, V. R. ShaginyanAbstract:A theoretically consistent approach to the calculation of the Coulomb correlation corrections to the single--Particle energies is presented. New contributions to the single--Particle energies previously overlooked in the literature are now identified and taken into account. We show that the interplay between the Coulomb interaction and the strong interaction, which is enhanced in the nuclear surface, leads to an upward shift of the proton single--Particle levels. This shift affects the position of the calculated proton drip line, a shift towards decreasing $Z$. We describe briefly a similar mechanism which is at work for neutron levels. The same mechanism is responsible for significant corrections to the mass difference of the mirror nuclei (Nolen--Schiffer anomaly) and to the effective proton mass.Comment: 11 pages + 1 figur
Haoning He - One of the best experts on this subject based on the ideXlab platform.
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the all Particle spectrum of primary cosmic rays in the wide Energy range from 1014 to 1017 ev observed with the tibet iii air shower array
The Astrophysical Journal, 2008Co-Authors: M Amenomori, Xiaojun Bi, D Chen, L K Ding, X H Ding, Cunfeng Feng, Zhaoyang Feng, Z Y Feng, Q X Geng, Haoning HeAbstract:We present an updated all-Particle Energy spectrum of primary cosmic rays in a wide range from 10 14 to 10 17 eVusing 5:5 ; 10 7 events collected from 2000 November through 2004 October by the Tibet-III air-shower array located 4300 m abovesealevel(anatmosphericdepthof 606gcm � 2 ).Thesizespectrumexhibitsasharpkneeatacorrespondingprimary Energy around 4 PeV. This work uses increased statistics and new simulation calculations for the analysis. We discuss our extensive Monte Carlo calculations and the model dependencies involved in thefinal result, assuming interaction models QGSJET01c and SIBYLL2.1, and heavy dominant (HD) and proton dominant (PD) primary composition models. Pure protonandpureironprimarymodelsarealsoexaminedasextremecases.A detector simulationwasalsoperformedtoimproveouraccuracyindeterminingthesizeof theairshowersandtheEnergyof theprimaryParticle.Weconfirmedthatthe all-Particle Energy spectra obtained under various plausible model parameters are not significantly different from each other, which was the expected result given the characteristics of the experiment at high altitude, where the air showers of the primary Energy around the knee reach near-maximum development, with their features dominated by electromagnetic components,leadingtoaweakdependenceontheinteractionmodel or theprimarymass.Thisisthehighest statistical and the best systematics-controlled measurement covering the widest Energy range around the knee Energy region.
John P Ferraris - One of the best experts on this subject based on the ideXlab platform.
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direct measurement of conjugated polymer electronic excitation energies using metal polymer metal structures
Physical Review Letters, 1996Co-Authors: I H Campbell, T W Hagler, D L Smith, John P FerrarisAbstract:We report electroabsorption measurements of built-in electric fields and internal photoemission measurements of Schottky barriers to determine the charge transfer and single-Particle Energy gaps of the conjugated polymer poly[2-methoxy, 5-(2{prime}-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV). For MEH-PPV, with an exciton absorption peak of 2.25 eV, our results yield a single-Particle Energy gap of 2.45 eV and a charge transfer Energy gap of at least 2.35 eV. Therefore, the exciton binding Energy is 0.2 eV and the bipolaron binding Energy is less than 0.1 eV. {copyright} {ital 1996 The American Physical Society.}
Tapash Chakraborty - One of the best experts on this subject based on the ideXlab platform.
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Coulomb screening and collective excitations in biased bilayer graphene
Physical Review B - Condensed Matter and Materials Physics, 2010Co-Authors: Xue-feng Wang, Tapash ChakrabortyAbstract:We have investigated the Coulomb screening properties and plasmon spectrum in a bilayer graphene under a perpendicular electric bias. The bias voltage applied between the two graphene layers opens a gap in the single Particle Energy spectrum and modifies the many-body correlations and collective excitations. The Energy gap can soften the plasmon modes and lead to a crossover of the plasmons from a Landau damped mode to being undamped. Plasmon modes of long lifetime may be observable in experiments and may have potentials for device applications.
Daniel J Gershman - One of the best experts on this subject based on the ideXlab platform.
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wave Particle Energy exchange directly observed in a kinetic alfven branch wave
Nature Communications, 2017Co-Authors: Daniel J Gershman, Adolfo Fvinas, J C Dorelli, Scott A Boardsen, L A Avanov, Paul Bellan, S J SchwartzAbstract:Alfven waves are fundamental plasma wave modes that permeate the universe. At small kinetic scales, they provide a critical mechanism for the transfer of Energy between electromagnetic fields and charged Particles. These waves are important not only in planetary magnetospheres, heliospheres and astrophysical systems but also in laboratory plasma experiments and fusion reactors. Through measurement of charged Particles and electromagnetic fields with NASA’s Magnetospheric Multiscale (MMS) mission, we utilize Earth’s magnetosphere as a plasma physics laboratory. Here we confirm the conservative Energy exchange between the electromagnetic field fluctuations and the charged Particles that comprise an undamped kinetic Alfven wave. Electrons confined between adjacent wave peaks may have contributed to saturation of damping effects via nonlinear Particle trapping. The investigation of these detailed wave dynamics has been unexplored territory in experimental plasma physics and is only recently enabled by high-resolution MMS observations.
