Results 11 to 20 of about 993,566 (290)

Evaluating the New Automatic Method for the Analysis of Absorption Spectra Using Synthetic Spectra

open access: yesUniverse, 2017
We recently presented a new “artificial intelligence” method for the analysis of high-resolution absorption spectra (Bainbridge and Webb, Mon. Not. R. Astron. Soc. 2017, doi:10.1093/mnras/stx179).
Matthew B. Bainbridge, John K. Webb
doaj   +4 more sources

Optical absorption spectra of bipolarons [PDF]

open access: yesPhysical Review B, 2001
The absorption of large bipolarons is investigated using the path-integral method. The response of a bipolaron to an external electromagnetic field is derived in the framework of the memory-function approach. The bipolaron optical absorption spectrum consists of a series of relatively narrow peaks.
Devreese, Jozef   +2 more
openaire   +5 more sources

Narrow absorption features in the co-added XMM-Newton RGS spectra of isolated Neutron Stars [PDF]

open access: yes, 2011
We co-added the available XMM-Newton RGS spectra for each of the isolated X-ray pulsars RX\,J0720.4$-$3125, RX\,J1308.6+2127 (RBS\,1223), RX\,J1605.3+3249 and RX\,J1856.4$-$3754 (four members of the "Magnificent Seven") and the "Three Musketeers" Geminga,
de Vries, Cor P.   +4 more
core   +16 more sources

Application of machine learning algorithms for prediction of ultraviolet absorption spectra of chromophoric dissolved organic matter (CDOM) in seawater

open access: yesFrontiers in Marine Science, 2023
The ultraviolet absorption spectra of chromophoric dissolved organic matter (CDOM) can be used to trace its sources and to explore the dynamic of the CDOM pool.
Aobo Ju   +3 more
doaj   +1 more source

Modeling of alkynes: synthesis and theoretical properties

open access: yesMaterials Research, 2003
In this paper we present the synthesis and simulation of alkynes derivatives. Semiempirical calculations were carried out for the ground and first excited states, including the spectroscopic properties of the absorption and emission (fluorescence and ...
Renato Rosseto   +2 more
doaj   +1 more source

Light absorption spectra in oligothiophene molecules [PDF]

open access: yes, 2017
Para el dictado de clases, se pueden utilizar diferentes herramientas que nos brindan las nuevas tecnologías; herramientas que nos están modificando los procesos de enseñanza-aprendizaje.
Gala, Fabrizio, Zollo, Giuseppe
core   +4 more sources

Subaru Spectroscopy and Spectral Modeling of Cygnus A [PDF]

open access: yes, 2014
We present high angular resolution ($\sim$0.5$^\prime$$^\prime$) MIR spectra of the powerful radio galaxy, Cygnus A, obtained with the Subaru telescope.
Aretxaga, Itziar   +8 more
core   +4 more sources

Dataset of emission and excitation spectra, UV–vis absorption spectra, and XPS spectra of graphitic C3N4

open access: yesData in Brief, 2018
In this data article, the normalized emission and excitation spectra, the ultraviolet-visible (UV–vis) absorption spectra, and the X-ray photoelectron spectroscopy (XPS) of bulk-powders and nano-structured graphitic C3N4 (g-C3N4) were presented, which ...
Liangrui He   +11 more
doaj   +1 more source

A broadband optical cavity spectrometer for measuring weak near-ultraviolet absorption spectra of gases [PDF]

open access: yesAtmospheric Measurement Techniques, 2011
Accurate absorption spectra of gases in the near–ultraviolet (300 to 400 nm) are essential in atmospheric observations and laboratory studies. This paper describes a novel incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instrument ...
J. Chen, D. S. Venables
doaj   +1 more source

Dangerous Bonds Individual of Hydrogenated Amorphous Silicon and Defect Absorption Spectra

open access: yesEast European Journal of Physics, 2023
In this work, defect absorption spectra for defects characteristic of hydrogenated amorphous silicon are theoretically studied. It is shown that in order to determine defect absorption spectra using the Kubo-Greenwood formula, the indefinite integral in
Rustamjon G. Ikramov   +5 more
doaj   +1 more source

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