Results 181 to 190 of about 285 (203)

Determination of phase and amplitude of degree of coherence from spectroscopic measurements

Optics Communications, 2000
In a recent study, James and Wolf [D.F.V. James, E. Wolf, Opt. Commun. 145 (1998) 1] have shown theoretically that if spectral measurements are made at several off-axes points in Young's interference experiment, the amplitude and the phase of the spectral degree of coherence can be determined.
S.S.K Titus, Ajay Wasan, J.S Vaishya, H.C Kandpal   +3 more
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Spectroscopic imaging by dephasing amplitude changing (SIDAC).

Radiation medicine, 1989
A technique for spectroscopic imaging based on a new concept of dual encoding (i.e., both phase and frequency encoding) of position along the direction of the read-out gradient is proposed. The phase encoding is produced by changing the amplitude of the dephasing gradient as in conventional phase encoding.
T, Miyazaki, T, Yamamoto, N, Iriguchi, Y, Ueshima, J, Hasegawa, S, Yamai, K, Hikida, A, Manabe, H, Toyoshima, T, Maki   +9 more
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Mean amplitudes of vibration for CH3SO2F and CH3SO2Cl from spectroscopic data

Journal of Molecular Structure, 1973
Abstract A tentative assignment of vibrational frequencies for CH 3 SO 2 F and CH 3 SO 2 Cl is established. The available spectral data from literature were supplemented by new infrared measurements in the liquid phase. A normal coordinate analysis was performed on the basis of the assigned frequencies.
S.J. Cyvin, S. Dobos, I. Hargittai, M. Hargittai, Else Augdahl   +4 more
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The Distributions of Periods and Amplitudes of Late-Type Spectroscopic Binaries

1985
Photoelectric radial-velocity measurements, made on an unhurried observing schedule, have permitted the discovery of groups of spectroscopic binaries in which the usual observational discrimination against long periods and small amplitudes is much reduced.
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Empirical determination of intermediate-coupling amplitudes and transition rates from spectroscopic data

Physical Review A, 1991
A simple general method is presented whereby measured spectroscopic energy-level data can be used to empirically construct the eigenvectors of intermediate coupling for an arbitrary configuration. These empirical eigenvectors can be used to elucidate the transition rates into, out of, and among the levels of the configuration by separating the effects ...
, Curtis, , Rudzikas, , Ellis
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Spectroscopic ellipsometry using the grating division-of-amplitude photopolarimeter (G-DOAP)

Thin Solid Films, 2004
Abstract Spectroscopic ellipsometric (SE) measurements obtained using the grating division-of-amplitude photopolarimeter (G-DOAP) are presented. G-DOAP measures all four Stokes parameters of arbitrarily polarized light over the full spectrum (550–940 nm in the present case), with no moving parts or modulators in less than 1 s.
S. Krishnan, Scott Hampton, R.M.A. Azzam
openaire   +1 more source

Spectroscopic exhibitions of large-amplitude motions in halogen-containing coordination systems

SPIE Proceedings, 2000
The spectroscopic exhibitions of the structural non-rigidity effects in the series of the complex molecular systems with a few large amplitude motions are investigated with the application of the combination of original experimental and theoretical approaches which were tested by us earlier for the study of the floppy molecules.
Shavkat S. Nabiev, I. A. Perevalova, A. N. Pinzul, L. P. Sukhanov   +3 more
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Analysis of the α-spectroscopic amplitudes of¹⁶O

Journal of Physics G: Nuclear Physics, 1978
The alpha -spectroscopic amplitudes of 16O are analysed in detail using the recent calculation of Apagyi and Fai (1976) based on the shell-model results of Zuker et al (1968). The importance of the knowledge of the precise magnitude and phase of the amplitudes is emphasised.
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Large amplitude motions in coumaran: a spectroscopic and theoretical study

2004
$^{a}$E. Bondoc, T. Klots, J. Laane, J. Phys. Chem A 104, 275 (2000) ; Author Institution: Dipartimento di Chimica ``G. Ciamician'', Universit\`{a} di Bologna ; The structure of coumaran (2,3-dihydrobenzofuran) is characterized by a non-planar skeleton, due to the position of the most far apart carbon in the dihydrofuran ring. We have measured 133 a, b
OTTAVIANI, PAOLO, CAMINATI, WALTHER
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An approximate method for calculating mean amplitudes of vibration from spectroscopic data—II

Spectrochimica Acta, 1959
Abstract A refinement of Morino's approximate formula for mean square amplitudes due to harmonic vibrations in polyatomic molecules is given. Approximate formulae with four terms, based upon a four-constant approximation for the hyperbolic cotangent, are evaluated. The method may be applied for ranges of vibrational frequencies up to about 3000 cm −1
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