Possible Link between the Distribution of Atomic Spectral Lines and the Radiation–Matter‐Equilibrium in the Early Universe
Sign Up to like & getrecommendations! Published in 2020 at "Annalen der Physik"
DOI: 10.1002/andp.202000033
Abstract: The uncanny resemblance of the global distribution of all experimentally known atomic spectral lines to the Planckian spectral distribution associated with black body radiation at a temperature of T≈9000K is reported. This value coincides with… read more here.
Keywords: atomic spectral; radiation matter; early universe; distribution ... See more keywords
The Features of the Frequency-Modulation Method When Studying the Shapes of the Spectral Lines of Nonlinear Absorption
Sign Up to like & getrecommendations! Published in 2017 at "Radiophysics and Quantum Electronics"
DOI: 10.1007/s11141-017-9740-z
Abstract: We briefly consider the method of the frequency (phase) modulation and signal detection at the second harmonic of the modulation frequency for recording and analyzing the spectral-line shapes. The precision sub-Doppler spectrometer in the millimeter-… read more here.
Keywords: absorption; modulation; features frequency; method ... See more keywords
The Problem of the Height Dependence of Magnetic Fields in Sunspots
Sign Up to like & getrecommendations! Published in 2018 at "Solar Physics"
DOI: 10.1007/s11207-018-1338-x
Abstract: To understand the physics of sunspots, it is important to know the properties of their magnetic field, and especially its height stratification plays a substantial role. There are mainly two methods to assess this stratification,… read more here.
Keywords: range; problem height; field; spectral lines ... See more keywords
New assignment of 14N NQR spectral lines for tetrazoles derivatives
Sign Up to like & getrecommendations! Published in 2018 at "Chemical Physics"
DOI: 10.1016/j.chemphys.2018.03.030
Abstract: Abstract In recent years, considerable interest has been shown in the study of tetrazole derivatives, which attract attention as highly nitrogenous compounds for use as an isosteric substitutes for various functional groups that leads to… read more here.
Keywords: 14n nqr; nqr spectral; tetrazoles derivatives; spectral lines ... See more keywords
Synthesizing gas-filled anti-resonant hollow-core fiber Raman lines enables access to the molecular fingerprint region
Sign Up to like & getrecommendations! Published in 2024 at "Nature Communications"
DOI: 10.1038/s41467-024-52589-8
Abstract: The synthesis of multiple narrow optical spectral lines, precisely and independently tuned across the near- to mid-infrared region, is a pivotal research area that enables selective and real-time detection of trace gas species within complex… read more here.
Keywords: concept; gas; fiber; gas filled ... See more keywords
Empirical determination of atomic line parameters of the 1.5 μm spectral region
Sign Up to like & getrecommendations! Published in 2021 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202038941
Abstract: Context. Both the quality and amount of astrophysical data are steadily increasing over time owing to the improvement of telescopes and their instruments. This requires corresponding evolution of the techniques used for obtaining and analyzing… read more here.
Keywords: spectral range; parameters spectral; spectral lines; atomic parameters ... See more keywords
Displacement sensing through deformation of Fano spectral lines from bilayer-grating compound structure
Sign Up to like & getrecommendations! Published in 2025 at "Physica Scripta"
DOI: 10.1088/1402-4896/adab97
Abstract: In order to achieve the reversal of Fano spectral lines and a new displacement sensing, we construct a compound structure composed of two periodic gratings fixed on two sides of a waveguide layer. Through the… read more here.
Keywords: deformation; fano spectral; compound structure; displacement sensing ... See more keywords
Temporal intensity interferometry for characterization of very narrow spectral lines
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx968
Abstract: Context: Some stellar objects exhibit very narrow spectral lines in the visible range additional to their blackbody radiation. Natural lasing has been suggested as a mechanism to explain narrow lines in Wolf-Rayet stars. However, the… read more here.
Keywords: temporal intensity; intensity interferometry; spectral lines; narrow spectral ... See more keywords
Non-Zeeman circular polarization of molecular spectral lines in the ISM
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2068
Abstract: Accurately measuring the magnetic field in the ISM is essential for understanding star-formation processes. We searched archival data of the Submillimeter Array (SMA) for evidence of circular polarization in common molecular tracers, most notably CO.… read more here.
Keywords: ism; polarization molecular; molecular spectral; polarization ... See more keywords
Gravitational wave effects on radio spectral lines of atomic hydrogen: Hyperfine splitting and broadening mechanisms
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review D"
DOI: 10.1103/9qjr-tfgp
Abstract: We explore the effects of gravitational waves (GWs) on hydrogen's radio spectral lines, focusing on the ground-state hyperfine transition and radiative transitions in highly excited Rydberg states. To analyze GW impacts on hyperfine structure, we… read more here.
Keywords: radio spectral; gravitational wave; hyperfine; hydrogen ... See more keywords
The nuclear weapons complexities [Spectral Lines]
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Spectrum"
DOI: 10.1109/mspec.2017.8000033
Abstract: In a sign that nuclear weapons remain vital technologically and militarily, the U.S. government has launched a multidecade "modernization" program for the nation's 4,571 nuclear weapons, at an estimated cost of up to US $1… read more here.
Keywords: nuclear weapons; complexities spectral; weapons complexities; spectral lines ... See more keywords