Results 1 to 10 of about 813,008 (317)
Infrared Spectroscopy—Mid-infrared, Near-infrared, and Far-infrared/Terahertz Spectroscopy
Analytical Sciences, 2021 This article aims to overview infrared (IR) spectroscopy. Simultaneously, it outlines mid-infrared (MIR), near-infrared (NIR), and far-infrared (FIR) or terahertz (THz) spectroscopy separately, and compares them in terms of principles, characteristics, advantages, and applications.
Yukihiro Ozaki, Yukihiro Ozaki
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The scales of the infrared [PDF]
Journal of High Energy Physics, 2018 Abstract In theories with long-range forces like QED or perturbative gravity, loop corrections lead to vanishing amplitudes. There are two well-known procedures to address these infrared divergences: dressing of asymptotic states and inclusion of soft emission.
Raoul Letschka +4 more
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Journal of High Energy Physics, 2017 Memory effects in scattering processes are described in terms of the asymptotic retarded fields. These fields are completely determined by the scattering data and the zero mode part is set by the soft photon theorem. The dressed asymptotic states defining an infrared finite S- matrix for charged particles can be defined as quantum coherent states using
Raoul Letschka, Cesar Gomez, Cesar Gomez
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Near-Infrared and Mid-Infrared Spectroscopy with the Infrared Camera (IRC) for AKARI [PDF]
Publications of the Astronomical Society of Japan, 2007 Abstract The Infrared Camera (IRC) is one of the two instruments on board the AKARI satellite, In addition to deep imaging from 1.8 to 26.5 $\mu$m for the pointed observation mode of the AKARI, it has a spectroscopic capability in its spectral range.
Hidenori Watarai +26 more
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Infrared and Near-Infrared Spectroscopy of Acetylacetone and Hexafluoroacetylacetone [PDF]
The Journal of Physical Chemistry A, 2015 The infrared and near-infrared spectra of acetylacetone, acetylacetone-d8, and hexafluoroacetylacetone are characterized from experiment and computations at different levels. In the fundamental region, the intramolecular hydrogen bonded OH-stretching transition is clearly observed as a very broad band with substantial structure and located at ...
Henrik G. Kjaergaard +7 more
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International Journal of Modern Physics E, 2009 We prove that Nambu–Jona-Lasinio model is an exact description of infrared Quantum ChromoDynamics (QCD) deriving it from QCD Lagrangian. The model we obtain is renormalizable and confining but, taking very small momenta fixes completely all the parameters of the Nambu–Jona-Lasinio model through those of QCD.
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Near-Infrared Spectra of Ultraluminous Infrared Galaxies [PDF]
The Astrophysical Journal, 1999 Near infrared spectra with resolution R ~ 1100 in the rest wavelength range 1.8-2.2 microns have been obtained for a complete sample of 33 ultraluminous infrared galaxies. Of the 33 objects observed, 2 show evidence of a central AGN through either a broad Paschen-alpha line or emission in the 1.963 micron fine structure of [Si VI].
Keith Matthews +5 more
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Mid infrared polarisation of Ultraluminous Infrared Galaxies [PDF]
Astronomy & Astrophysics, 2001 The mid infrared polarisation properties of four Ultraluminous Infrared Galaxies (ULIRGs) have been investigated by broad band filter observations with the ISOCAM instrument on board the Infrared Space Observatory (ISO). The wavelength region from 5 to 18 mic. was selected where the emission from the putative torus peaks.
Andreas Efstathiou, Ralf Siebenmorgen
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Nuclear Physics B, 1979 Revised 25 September 1978 We study the structure of infrared divergences in superrenormalizable interactions. We conjecture that there is an extension of the Bogoliubov-Parasiuk-Hepp theorem which copes also with infrared divergences. We discuss the consequences of this conjecture on the singularities of the Borel transform in a massless asymptotic ...
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Entanglement and the Infrared [PDF]
, 2020 We shall outline some results regarding the infrared catastrophes of quantum electrodynamics and perturbative quantum gravity and their implications for information loss in quantum processes involving electrically or gravitationally charged particles.
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