Oscillator-strength distribution in the discrete and continuous spectra of the alkali elements

1987 ◽  
Vol 65 (4) ◽  
pp. 435-437 ◽  
Author(s):  
Carmen Barrientos ◽  
Inmaculada Martin
Keyword(s):  
Oscillator Strength ◽  
Cross Sections ◽  
Strength Distribution ◽  
Quantum Defect ◽  
Ionization Threshold ◽  
Spectral Series ◽  
Discrete And Continuous Spectra ◽  
Alkali Elements

The oscillator-strength distribution between the discrete and continuous regions of the spectrum of the alkali elements Li, Na, K, Rb, and Cs has been obtained by following the quantum defect orbital (QDO) procedure. Continuity across the spectral-series limit has been found, and ionization-threshold cross sections are also reported.

Construction of Constrained Dipole Oscillator Strength Distributions

2016 ◽  
Vol 230 (5-7) ◽  
Author(s):  
Ajit J. Thakkar
Keyword(s):  
Oscillator Strength ◽  
Cross Sections ◽  
High Energy ◽  
Strength Distribution ◽  
Sum Rule ◽  
Molar Refractivity ◽  
High Energy Behavior ◽  
Energy Behavior ◽  
Sample Application ◽  
Dipole Oscillator

AbstractA brief review is given of how a constrained dipole oscillator strength distribution (DOSD) is constructed from experimental and possibly theoretical photoabsorption cross-sections with constraints provided by molar refractivity data and the Kuhn–Reiche–Thomas sum rule. Some recent refinements including the imposition of the correct high-energy behavior on the DOSD for homoatomic molecules are discussed and extended to the general molecular case. A sample application to pyridine is given.

Oscillator strength distribution in the alkaline-earth elements

1988 ◽  
Vol 66 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Carmen Barrientos ◽  
Inmaculada Martin
Keyword(s):  
Oscillator Strength ◽  
Alkaline Earth ◽  
Strength Distribution ◽  
Quantum Defect ◽  
Interference Effects ◽  
Electron Transitions ◽  
Alkaline Earth Elements ◽  
The Continuum

The oscillator strength distribution between the discrete and continuous regions of the spectra of Mg, Ca, Sr, and Ba has been obtained. Computations have been carried out through the Quantum Defect Orbital (QDO) method, with explicit introduction of the two-electron transitions that lead to resonances in the spectra of the last three elements. Interference effects between excitations to autoionizing levels and to the continuum have been ignored.

Dipole oscillator strength distributions and properties for SO2, CS2, and OCS

1985 ◽  
Vol 63 (3) ◽  
pp. 417-427 ◽  
Author(s):  
Ashok Kumar ◽  
William J. Meath
Keyword(s):  
Oscillator Strength ◽  
Cross Sections ◽  
Ground State ◽  
Strength Properties ◽  
Oscillator Strengths ◽  
Sum Rule ◽  
Strength Data ◽  
Dilute Gases ◽  
Dipole Oscillator ◽  
Strength Distributions

Dipole oscillator strength distributions have been constructed and used to evaluate integrated oscillator strengths, and a variety of dipole oscillator strength properties, for ground state SO2, CS2, and OCS. Each distribution has been constructed by using experimental and theoretical photoabsorption cross sections and by subjecting the resulting dipole oscillator strength data to constraints provided by the Thomas–Reiche–Kuhn sum rule and molar refractivity data for the relevant dilute gases. The discussion includes graphical presentations of how various spectral regions of the dipole oscillator strength distributions contribute to the more important dipole properties.

Measurement of Atomic Oscillator Strength Distribution from the Excited States

2008 ◽  
Author(s):  
Shahid Hussain ◽  
M. Saleem ◽  
M. A. Baig ◽  
Marco Antonio Gigosos ◽  
Manuel Ángel González
Keyword(s):  
Oscillator Strength ◽  
Excited States ◽  
Strength Distribution

Laser-induced Compton scattering from a bound electron

1992 ◽  
Vol 70 (1) ◽  
pp. 72-77 ◽  
Author(s):  
F. Ehlotzky
Keyword(s):  
Angular Distribution ◽  
Compton Scattering ◽  
Harmonic Generation ◽  
Cross Sections ◽  
Laser Field ◽  
Multiphoton Ionization ◽  
Ionization Threshold ◽  
Powerful Laser ◽  
Bound Electrons ◽  
Bound Electron

We investigate nonrelativistically Compton scattering by an electron bound in hydrogen in a powerful laser field. The corresponding nonlinear rates and cross sections are evaluated in a Keldysh-type of approximation and compared with the rates and cross sections of multiphoton ionization and harmonic generation. We find that multiphoton ionization overshadows Compton scattering by many orders of magnitude, however, Compton scattering may well compete with harmonic generation above the ionization threshold, since, in particular, both processes have the same angular distribution and only odd harmonics can be created by bound electrons, while in bound-free Compton scattering all harmonics will be generated.

Sign in / Sign up

Export Citation Format

Share Document