Results 291 to 300 of about 4,193,433 (326)
Beyond the Edge: Charge‐Transfer Excitons in Organic Donor‐Acceptor Cocrystals
Advanced Functional Materials, EarlyView.Complex excitonic landscapes in acene–perfluoroacene cocrystals are unveiled by polarization‐resolved optical spectroscopy and many‐body theory. This systematic study of a prototypical model system for weakly interacting donor–acceptor compounds challenges common views of charge‐transfer excitons, providing a refined conceptual framework for ...
Sebastian Anhäuser +6 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Ferroelectric memcapacitors enable non‐volatile, voltage‐programmable capacitance tuning for adaptive electronics. A TiN/HfZrO/TiN device stack demonstrates more than eight stable capacitance states within a 24 pF memory window in compact 60 ×$\times$ 60 μm2$\umu{\rm m}^{2}$ devices at low operating voltages.
Deepika Yadav +6 more
wiley +1 more source
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Annals of the New York Academy of Sciences, 1993
The distribution of γ‐ray bursts as observed by BATSE rules out the galactic disk origin, and it is consistent with the cosmological origin. Much work is currently done to reconcile galactic halo distribution with the absence of dipole and quadrupole moments in the positions of BATSE bursts. A relativistic expansion of the source is implied by both the
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The distribution of γ‐ray bursts as observed by BATSE rules out the galactic disk origin, and it is consistent with the cosmological origin. Much work is currently done to reconcile galactic halo distribution with the absence of dipole and quadrupole moments in the positions of BATSE bursts. A relativistic expansion of the source is implied by both the
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AIP Conference Proceedings, 1983
The time histories, size spectrum, spatial distribution, and repetition rates of gamma ray bursts are reviewed briefly. Evidence for a neutron star origin for gamma ray bursts may be found in many of these aspects of bursters. New results from optical searches are described.
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The time histories, size spectrum, spatial distribution, and repetition rates of gamma ray bursts are reviewed briefly. Evidence for a neutron star origin for gamma ray bursts may be found in many of these aspects of bursters. New results from optical searches are described.
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Gamma-ray bursts and gamma-ray blazars
AIP Conference Proceedings, 1994We propose that cosmological gamma‐ray bursts are produced when modestly sized black holes tidally disrupt stars, energizing relativistically outflowing jets and producing bursts for favorably oriented observers. The crucial test of this model is the detection of soft x‐ray flares with durations of ∼102 s and fluences ∼10−10−10−6 ergs cm−2 at rates of ...
Charles D. Dermer, Reinhard Schlickeiser
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Physics Bulletin, 1978
Abstract The potential value of investigation of the γ-ray content of cosmic radiation has long been recognized, but evaluation of measurements made with high-flying balloons is difficult because of the generation of secondary γ-rays in the atmosphere above the detector.
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Abstract The potential value of investigation of the γ-ray content of cosmic radiation has long been recognized, but evaluation of measurements made with high-flying balloons is difficult because of the generation of secondary γ-rays in the atmosphere above the detector.
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1988
Abstract The observational status of gamma-ray astronomy in the TeV energy range is rapidly changing and is reviewed (1987) with emphasis on the limitations of the present observations. It is apparent that gamma-ray detection techniques must be improved and some methods by which this can be achieved are outlined.
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Abstract The observational status of gamma-ray astronomy in the TeV energy range is rapidly changing and is reviewed (1987) with emphasis on the limitations of the present observations. It is apparent that gamma-ray detection techniques must be improved and some methods by which this can be achieved are outlined.
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