Reply to “Line shape measurement and isolated line width calculations: Quantal versus semiclassical methods”

1999 ◽  
Vol 60 (5) ◽  
pp. 6241-6241 ◽  
Author(s):  
Hans R. Griem ◽  
Yuri V. Ralchenko ◽  
Igor Bray
Keyword(s):  
Line Width ◽  
Line Shape ◽  
Shape Measurement ◽  
Semiclassical Methods

Line shape measurement and isolated line width calculations: Quantal versus semiclassical methods

1999 ◽  
Vol 60 (5) ◽  
pp. 6238-6240 ◽  
Author(s):  
Spiros Alexiou ◽  
Siegfried Glenzer ◽  
Richard W. Lee
Keyword(s):  
Line Width ◽  
Line Shape ◽  
Shape Measurement ◽  
Semiclassical Methods

scholarly journals Paramagnetische Elektronenresonanz thermisch und durch Strahlung erzeugter Zentren in Bornitrid

1966 ◽  
Vol 21 (11) ◽  
pp. 1970-1975 ◽  
Author(s):  
G. Römelt
Keyword(s):  
Isotopic Composition ◽  
Line Width ◽  
Line Shape ◽  
X Rays ◽  
Natural Isotopic Composition ◽  
Epr Spectrum ◽  
Γ Radiation ◽  
Impurity Atoms ◽  
Gaussian Line Shape ◽  
Gaussian Line

By X-rays, ultraviolet, and γ-radiation or by heating to more than 1850 °C in powdered or sintered boronnitride centres are produced, which give an EPR-spectrum with 10 lines a=7.8 ± 0.1 Gauss apart with g=2.0027 ± 0.0003 for BN of natural isotopic composition (81.17% 11B; 18.83% 10B), and a single line for 10BN enriched to 91% 10B. The spectra are analysed as built up from 4 systems of spectra, caused by surroundings of 3 boron atoms, 3, 2, 1, or 0 of which are 11B, each occuring with the proper probability. The intensity of the different systems was calculated by assuming GAussian line shape and equal | ψ (0) |2 and line width for 11B and 10B. It is possible, that the EPR is caused by impurity atoms on the places of N or in the centre of B3N3-rings. Other spectra caused in BN by X-rays or by neutrons in a pile are discussed elsewhere 3, 8.

Complete Line Shape for the Impact, Static, and the Intermediate Regions

1975 ◽  
Vol 53 (1) ◽  
pp. 84-92 ◽  
Author(s):  
R. P. Srivastava ◽  
H. R. Zaidi
Keyword(s):  
Density Dependence ◽  
Line Width ◽  
Line Shape ◽  
Translational Motion ◽  
Excited Level ◽  
Dipole Interaction ◽  
Line Shapes ◽  
Classical Path ◽  
The Impact ◽  
Resonance Broadening

Line shapes are calculated for the resonance broadening of an excited level through the dipole–dipole interaction. The calculations are based on two main approximations: (1) two body collisions and (2) straight classical path for the translational motion. The results are valid over the complete region extending from the impact to the static regimes. It is shown that, under suitable conditions, the incomplete collisions can give rise to (a) a splitting of the line at the center and (b) nonlinear density dependence of the line width.

scholarly journals Structure of Xb from line shape analysis

2016 ◽  
Vol 31 (05) ◽  
pp. 1650035
Author(s):  
Yue Ma ◽  
Guo-Ying Chen
Keyword(s):  
Binding Energy ◽  
Shape Analysis ◽  
Line Shape ◽  
Production Line ◽  
Bound State ◽  
Shape Measurement ◽  
Line Shape Analysis ◽  
Elementary State ◽  
Two Parameters ◽  
Shed Light

We study the production line shape of [Formula: see text] near threshold, where the [Formula: see text] pair comes from the resonance [Formula: see text]. Our study shows that the line shape depends sensitively on the binding energy and the probability of finding an elementary state in the physical bound state. Both of the two parameters are crucial to identify the structure of [Formula: see text]. Therefore, the line shape measurement can shed light on the structure of [Formula: see text].

Studies of the Ionic Ferromagnet (LaPb)MnO3. VI. Antiresonance and the Ferromagnetic Resonance Line Shape

1971 ◽  
Vol 49 (3) ◽  
pp. 387-390 ◽  
Author(s):  
S. T. Wang ◽  
C. W. Searle
Keyword(s):  
Line Width ◽  
Ferromagnetic Resonance ◽  
Line Shape ◽  
Qualitative Agreement ◽  
Resonance Line ◽  
Skin Depth ◽  
Frequency Range ◽  
The Family

The resonance line shape and line width of the family La(1−x)PbxMnO3 have been examined from 77 to 430 °K in a frequency range from 13 to 25 GHz. The distorted line shape is in qualitative agreement with a calculation that includes the effect of the skin depth. The antiresonance condition has been observed and it is also in qualitative agreement with theory.

scholarly journals Dicke Narrowing Reduction of the Doppler Contribution to a Line Width

1981 ◽  
Vol 34 (6) ◽  
pp. 639 ◽  
Author(s):  
DRA McMahon
Keyword(s):  
Dipole Moment ◽  
Line Width ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Line Shape ◽  
Transport Theory ◽  
Diffusion Constant ◽  
Pressure Broadening ◽  
Velocity Changes ◽  
Velocity Moment

In the simplest kinetic models of collisional narrowing or reduction of the Doppler contribution to a spectral line width, the narrowing process is related to the usual diffusion constant of transport theory. Dicke narrowing requires a correlation between the pre- and post-collisional absorber or emitter electric dipole moment. Pressure broadening on the other hand results from at least a partial destruction of this correlation so that in general pressure broadening and Dicke narrowing are statistically dependent on and correlated with each other. It follows that a spectroscopic diffusion constant is required. A classical phase description (which is easily converted to a semiclassical one) is used here to derive a kinetic equation for which the approximate line shape is obtained by It velocity moment method. The spectroscopic diffusion constant closely resembles the Chapman-Enskog first approximation for the diffusion constant but has mixed in an extra function (the memory) which represents the correlation between collision-induced changes of the dipole moment and velocity changes and the correlation between the pre- and post-collision electric dipole moment. Dicke narrowing can be used to obtain information about the line broadening amplitude SB(b, w) for strong velocity-changing collisions. The Galatry ('weak' collision) and 'strong' collision line-shape functions are obtained as different cutoff approximations in the velocity moment analysis. The present analysis, however, is not limited to specifically weak or strong collisions. The two line-shape formulae are shown to be virtually identical sufficiently far from the line centre and at sufficiently high densities. Convenient, approximate analytical formulae for the half-width are obtained using two different definitions.

Sign in / Sign up

Export Citation Format

Share Document