Some lifetimes, oscillator strengths and radial integrals in the Cu I spectrum

Krellmann, H; Siefart, E.; Weihreter, E

doi:10.1088/0022-3700/8/16/018

Cited by 15 publications

(2 citation statements)

References 13 publications

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“…By comparing this method with conventional H F treatments, Biemont finds the STF scheme yields wavefunctions much more rapidly than HF, but with little change in the values of the transition probabilities. The same conclusion was found independently in a study of neutral copper by Krellmann et al [42]. In all these calculations, a limited amount of configuration interaction was included, usually obtained by the replacement 3d+4s since many of the transitions considered were of the form 3dn4s-3dn4p.…”

Section: Medium-sized Atomssupporting

confidence: 70%

Recent Advances in the Calculation of Oscillator Strengths

Hibbert

1977

Phys. Scr.

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A review of work published since the last beam-foil spectroscopy conference in Gatlinburg (1975) is presented. For allowed transitions where LS coupling is valid, the NCMET and FOTOS schemes are compared and an extension of the application of FOTOS is proposed. Where relativistic effects are important–for medium to heavy atoms and for forbidden transitions–the stability of coefficients in configuration interaction expansions, and the way in which the Breit or Breit-Pauli terms are introduced, are discussed.

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Section: Medium-sized Atomssupporting

confidence: 70%

Recent Advances in the Calculation of Oscillator Strengths

Hibbert

1977

Phys. Scr.

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“…Allthough the greatest problem is the lack of experimental oscillator strengths we will use the summation method, on calculating directly the matrix elements of the electric dipole operator. To start with the excited state 38°4peP3,2 of Cu I which may be assumed to be a pure LS-state (uncertainty within 10 percent, see KRELLMANN et al 1975) hold only the following transitions will contribute and The same procedure has been done for the dipole matrix elements of the inert gas atoms on expanding the ground state in antisymmetric states by means of coefficients of fractional parentage (C.f.p.) which is necessary since the ground states of the inert gas atoms contain only closed electron shells.…”

Section: Application To Experimentsmentioning

confidence: 99%

Lifetimes of Excited Alkalilike Atoms Colliding by Van der Waals Forces with Inert Gas Atoms in the Groundstate

Siefart

1982

Annalen der Physik

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The influence of Van der Wads forces on the lifetime of coherently excited hyperfine-states IFpF;) and I F p i $ ) of alkalilike atoms i by collissions with inert gas atomsj in the groundstale IFimpi) has been examined. To do this the timedependent Schrodinger equation has been solved on taking into account a static magnetic field, a radiation field and a Van der Wads force. Introducing an impact parameter model for the colliding atoms with small scattering angles which form a quasimolecule Jp> = IFimFiFimFi> an expression for the cross section uFFp has been derived which determines the halfwidth rFpt of the coherently excited states. On making use of the irreducible tensor representation the calculation of the cross-section has been reduced to the calculation of multipole transitions. The result has been applied e.g. to the coherently excited 3dl04~2P~,~-states of Cu I colliding by dipole-dipole interactions with inert gas atom's He I, Ne I and Ar I in the ground state.The values agree well with data which have been derived from zero-level-crossing experiments.

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Calculation of Oscillator Strength in the Sc I‐Spectrum

Siefart

1980

Annalen der Physik

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The oscillator strengths of the main transition from the 3d 45 4p-states to the groundstate 3d Asz of Sc I are calculated on using wave functions derived by diagnolization of the interaction matrix elements of the 3d 49 4p-, 3d2 4p-and 4.9 4pconfigurations. The relevant dipole matrix elements are reduced by application of tensor algebra to the unknown one-electron matrix elements <4811r[\+> and <3dl[r[(4p>. These radial integrals are calculated from experimental lifetimes and oscillator strengths as well a8 from theoretical models. The resulting absolute oscillator strengths show a fairly good agreement with the experimental data, the uncertainties being smaller than 10 percent for the strongest transitions. Berechnung von OszillatorenstPrken h i SC I-SpektrumInhaltsubersicht. Unter Verwendung von Wellenfunktionen, die uber die Diagonalisierung der ~'echselwirkungsmatrix der 3d 4s 4p-, 3d* 4p-und 4s* 4p-Konfigurationen gewonnen wurde, werden die Oszillatorensthrken der wesentlichen Ubergiinge von den 3d 4s 4pZustiinden in den Gnindzustand 3d 4 9 von Sc I berechnet. Die relevanten Dipol-Matrixelemente werden mit Hilfe der Tensor-Algebra auf die unbekannten Einelektronen-Matrixelemente <4a(lr1(4p) und <3d(l@p> reduziert. Diese Radialintegrale werden uber experimentell bestimmte Lebensdauern sowie uber verscliiedene theoretische Modelle berechnet. Die resultierenden absoluten Oszillatorenstarken zeigen innerhalb der Unsicherheiten von weniger als lo!/, fur die stiirksten Vbergiinge eine grite Ubereinstininiung mit experimentellen Werten.

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Some lifetimes, oscillator strengths and radial integrals in the Cu I spectrum

Cited by 15 publications

References 13 publications

Recent Advances in the Calculation of Oscillator Strengths

Recent Advances in the Calculation of Oscillator Strengths

Lifetimes of Excited Alkalilike Atoms Colliding by Van der Waals Forces with Inert Gas Atoms in the Groundstate

Calculation of Oscillator Strength in the Sc I‐Spectrum

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