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1 edition of Level crossing/anticrossing spectroscopy found in the catalog.

Level crossing/anticrossing spectroscopy

Level crossing/anticrossing spectroscopy

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Published by North-Holland in Amsterdam .
Written in English


Edition Notes

Special issue.

Statementguest editors, W. Leo Meerts, Irving Ozier, Robert W. Field.
SeriesChemical physics -- v152, no.3
ContributionsMeerts, W. Leo., Ozier, Irving., Field, Robert W.
ID Numbers
Open LibraryOL20011000M

Level crossing spectroscopy is very similar to anticrossing spectroscopy except that in a level crossing experiment there exists no perturbation between the levels. If there is to be an observable signal in a (continuous) experiment there must be coherence (off-diagonal density matrix elements) in the excitation process. They range from sodium chloride, the old Roentgen / Ioe material where we could prove the existence of an unusual isotope eect in nickel-doped crystals, over level-crossing experiments in gases, to GaAs/A1As superlattices, where level-anticrossing spectroscopy of excitons reveals detailed information about recombination processes and interface.

J. Bengtsson, J. Larsson, S. Svanberg, C.G. Wahlström: Hyperfine-structure study of the 3d 10 p 2 P 3/2 level of neutral copper using pulsed level crossing spectroscopy at short laser wavelengths. Phys. Rev. A 41, () ADS CrossRef Google Scholar. The fine-structure splitting of the 42D state in lithium was measured using stepwise laser excitation combined with level-crossing spectroscopy. The splitting was determined to be () MHz, a considerably higher value than the one obtained in a recent level-anticrossing measurement. The new value is in good agreement with the result of a Hartree-Fock .

anticrossing technique for measuring the 5'DD energy separation with high pre- cision. In the electric-field case radiofrequency and level crossing techniques may become convenient tools for precision measurements on anticrossings as pointed out in this paper (section 6). @article{osti_, title = {Avoided-Level-Crossing Spectroscopy with Dressed Matter Waves}, author = {Eckardt, Andre and Holthaus, Martin}, abstractNote = {We devise a method for probing resonances of macroscopic matter waves in shaken optical lattices by monitoring their response to slow parameter changes, and show that such resonances can be disabled by .


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Level crossing/anticrossing spectroscopy Download PDF EPUB FB2

Abstract. About thirty years ago, new ways of investigating the level structure of excited states were opened by the radio-frequency experiment of Lamb and Retherford (1) and by the optical double resonance (ODR) technique (2) suggested by Brossel and Kastler.

(3) Together with the level-crossing (4,5,7) and the anticrossing techniques, (6,9) these methods enabled. The level-crossing technique of atomic spectroscopy utilizes the spatial interference in the scattering of resonance radiation which can occur when a Zeeman level of one of the fine (hyperfine) structure levels of an atom is brought into coincidence (“crossed”) with a Zeeman level of a neighboring fine (hyperfine) structure level by the application of an external magnetic by: 8.

Thirty four level anticrossing signals arising from the avoided crossing of ground-state rotational levels that differ in k by three or by six were observed in the CO 2 laser Stark spectrum of POF 3.

Fifteen level crossing signals were also observed and were interpreted as resulting from the crossing of the k=0 and k= ± 3 levels in the ground state, Cited by: 5. Quantum-beat, level-crossing, and anticrossing spectroscopy are inherently Doppler-free ways of obtaining precise spectroscopic information about excited states.

Quantum-beat and level-crossing spectroscopy are coherent in the sense that it is necessary to create a coherent superposition of states to observe a signal.

Laser Magnetic Resonance Level crossing/anticrossing spectroscopy book Laser Zeeman) Spectroscopy Laser Stark (Or Laser Electric Resonance) Spectroscopy Saturation Spectroscopy Laser Induced Fluorescence Level Crossing Spectroscopy, Including the Hanle Effect Level Anticrossing Spectroscopy Quantum Beat SpectroscopyBook Edition: 1.

magnetic-resonance spectroscopy near the electronic ground-state level anticrossing (GSLAC) at an axial magnetic eld around mT in diamond samples Level crossing/anticrossing spectroscopy book low (1 ppm) and high ( ppm) nitrogen concentration.

By applying microwaves in the. Nonlinear level anticrossing effects have been observed in saturated absorption in transitions in the ν 4 band of POF 3 by the method of laser-Stark spectroscopy.

The anticrossings occur as narrow additional absorptions superimposed on the Doppler-broadened transitions. From the resonant fields of the anticrossings, values of A0- B0 have been. The band anticrossing effects have also been observed in other group III-V materials alloyed with nitrogen including GaNxP1-x [53], InNxP1-x, [7, 43, 44], GaNxSbyAs 1-x - y [54], and InNxSb1-x [55].

For instance, the change of the band gap energy of gas-source MBE-grown InNxP1-x as a function of N content is shown in Figure The band gap. The level-crossing technique of atomic spectroscopy utilizes the spatial interference in the scattering of resonance radiation which can occur when two Zeeman levels of an atom are brought into coincidence ("crossed") by the application of an external magnetic field.

"Anticrossing" refers to the case where the two levels involved are coupled by a small static. The hfs of the 6 1 P 1 state of Yb has been investigated by level-crossing and anticrossing spectroscopy.

From an optimal fit of experimental and calculated signal curves we get the hfs coupling constants: A = (80) MHz, B = () MHz. * Saturated absorption spectroscopy * Two-photon spectroscopy * Polarization spectroscopy * Cross-over resonances * Interaction times: the Ramsey technique: cooling * Optical Pumping: Ground States * Fluorescence Spectroscopy: Excited States * Optical-radiofrequency double resonance * Level-crossing spectroscopy * Anticrossing spectroscopy.

Read the latest chapters of Experimental Methods in the Physical Sciences atElsevier’s leading platform of peer-reviewed scholarly literature. Purchase Atomic, Molecular, and Optical Physics: Atoms and Molecules, Volume 29B - 1st Edition.

Print Book & E-Book. ISBNAbstract. The fine-structure splitting of the 4 2 D state in lithium was measured using stepwise laser excitation combined with level-crossing spectroscopy.

The splitting was determined to be () MHz, a considerably higher value than the one obtained in a recent level-anticrossing. Additional Physical Format: Online version: Hanle effect and level-crossing spectroscopy.

New York: Plenum Press, © (OCoLC) Document Type. PDF | We report a study of the magnetic field dependence of the photo-luminescence of NV − centers (negatively charged nitrogen-vacancy centers) in |.

In the experiment concerning the level anticrossing spectroscopy, the experimental widths are measured in the unit of V/cm, but the theoretical ones are presented in the unit of 1/cm.

To facilitate the comparison of the experimental data with theoretical values, it is necessary to know the conversion factors that give the relation between the units of V/cm and 1/cm.

Energy levels of nitrogen-vacancy centers in diamond were investigated using optically detected magnetic-resonance spectroscopy near the electronic ground-state level anticrossing.

At a level anticrossing, the two levels repel because of the coupling between them and the changes in conductivity are due to the effects of state mixing as well as to interference. The effects of both types of crossing are discussed in the two limiting cases of weak and strong resonant scattering in comparison with the other scattering rates.

ABC-stacked N-layer graphene consists of 2N carbon atoms in a primitive unit cell, see figure (e). Each of the graphene sheets is shifted by a distance of with respect to the lower (upper) neighboring layer sublattice A of one layer is situated directly above the center of a hexagon in the adjacent lower layer, whereas the sublattice B lies above the lower-layer.

I am most pleased and, in a way, I feel honored to write the Foreword for the book The Hanle Effect and Level-Crossing Spectroscopy, which covers such a very wide range of applications not only in the initial areas of atomic and molecular physics, but also in solid state physics, solar physics, laser physics, and gravitational metrology.Giovanni Moruzzi, The Hanle Effect and Level-Crossing Spectroscopy—An Introduction, The Hanle Effect and Level-Crossing Spectroscopy, /, (), ().

Crossref Gerd M. Hermann, Kay Niemax, Coherent Forward Scattering Spectroscopy (Cfs): Present Status and Future Perspectives, C R C Critical Reviews in Analytical.In quantum physics and quantum chemistry, an avoided crossing (sometimes called intended crossing, non-crossing or anticrossing) is the phenomenon where two eigenvalues of an Hermitian matrix representing a quantum observable and depending on N continuous real parameters cannot become equal in value ("cross") except on a manifold of N-2 dimensions.

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