Results 271 to 280 of about 4,594,982 (313)

Fine Structure in the Absorption-Edge Spectrum of Ge

Physical Review, 1957
Measurements of the absorption spectrum of Si, made with high resolution, near the main absorption edge, at various temperatures between 4.2\ifmmode^\circ\else\textdegree\fi{}K and 415\ifmmode^\circ\else\textdegree\fi{}K, have revealed fine structure in the absorption on the long-wavelength side of this edge. This structure has been analyzed and can be
G. G. Macfarlane, T. P. McLean, J. E. Quarrington, V. Roberts   +3 more
openaire   +1 more source

Fine structure of the exciton spectrum in GaSe

Solid State Communications, 1978
Abstract New optical spectra near the fundamental edge of GaSe have been measured at low temperatures. The observed fine structure is explained in terms of transitions to excitonic groundstates and excited states, in terms of phonon replica of exciton ground states and in terms of excitons bound to intrinsic point defects.
null Le Chi Thanh, C. Depeursinge
openaire   +1 more source

The Spectrum of Fine-Grained Reservoirs From

International Petroleum Technology Conference, 2013
Abstract A spectrum of combinations of rock and hydrocarbon properties in fine-grained rocks can result in significant production, effectively spanning 'conventional' tight oil to fractured 'shale' gas reservoirs, in four main families based on dominant porosity-permeability system and stratal relations (i.e ...
K.M. Bohacs, Q.R. Passey, M. Rudnicki, W.L. Esch, O.R. Lazar   +4 more
openaire   +1 more source

HPSv3: Towards Wide-Spectrum Human Preference Score

IEEE International Conference on Computer Vision
Evaluating text-to-image generation models requires alignment with human perception, yet existing humancentric metrics are constrained by limited data coverage, suboptimal feature extraction, and inefficient loss functions.
Yuhang Ma, Xiaoshi Wu, Keqiang Sun, Hongsheng Li   +3 more
semanticscholar   +1 more source

Fine structure of the synchrotron-radiation spectrum

Radiophysics and Quantum Electronics, 1969
1) The synchrotron-radiation spectrum of a cluster of relativistic electrons moving in the field of a synchronous wave consists of lines and pedestal peaks at comparatively low energies. The line frequencies and those of the central peaks are harmonics of the synchronous-wave frequency.
M. E. Gertsenshtein, A. N. Malakhov, R. Ch. Bokun   +2 more
openaire   +1 more source

Fine structure in the absorption spectrum of MnO and its wavelength-modulation spectrum

Solid State Communications, 1976
Abstract Optical spectrum of MnO is investigated by using both absorption and wavelength-modulation techniques, and fine structures are found in the visible region. A tentative assignment of the structure of the A band is also given.
M. Yokogawa, K. Taniguchi, C. Hamaguchi
openaire   +1 more source

Fine structure in the K-absorption spectrum of copper

Chemical Physics Letters, 1974
Abstract The extended fine structure of the K-absorption edge of copper in copper-metal and in four of its salts has been investigated using a modified 40 cm curved crystal (mica, 2 01 planes) Cauchois type spectrograph. The observed absorption maxima are explained on the basis of Lytle's theory.
N.N. Saxena, S.N. Gupta, R.G. Anikhindi
openaire   +1 more source

The fine structure of the spectrum of the electronic NO laser

Journal of Molecular Spectroscopy, 1974
The spectrum of the electronic NO laser has been photographed with high resolution in the region 10 100–10 500 A. It shows the band system F2Δ-C2Π whose upper and lower states are both Rydberg states configurationally mixed with valence states. Only predissociated rotational levels of the lower state appear in the spectrum.
openaire   +1 more source

Fine-root traits in the global spectrum of plant form and function

Nature, 2021
C. P. Carmona, C. G. Bueno, A. Toussaint, S. Träger, Sandra Díaz, M. Moora, A. Munson, M. Pärtel, M. Zobel, Riin Tamme   +9 more
semanticscholar   +1 more source

Fine structure of the permittivity spectrum of a fluorite crystal

Physics of the Solid State, 1999
The experimental curve of the permittivity of fluorite is decomposed, for the first time, into 11 components in the range 10.5–18 eV (90 K) and 18 components in the range 10–35 eV (300 K) by the Argand diagram method. Three parameters are determined for each component: the energy at band maximum, the half-width of the band, and the oscillator strength.
V. V. Sobolev, A. I. Kalugin
openaire   +1 more source