Temat: 32.90.+a - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Core Polarization Effects in the Relativistic Quantum-Defect-Orbital Theory
Autorzy:: Bielińska-Wąż, D.
Martin, I.
Karwowski, J.
Tematy:: 32.70.Cs
32.90.+a; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1931291.pdf Link otwiera się w nowym oknie
Opis:: The quantum-defect-orbital method has been reformulated in order to include both relativistic effects and the electron correlation described by a core polarization potential. All quantities appearing in this formulation may be evaluated analytically. A comparison with experimental results demonstrates, on one hand, significance of the relativity-correlation corrections and, on the other, inadequacy of the relativistic quantum-defect-orbital approach when indirect relativistic effects are important, i.e. when atoms contain closed shells of d electrons.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Population Inversion on Transition into the Ground State of Atoms Induced by Optical Excitation and Collisions
Autorzy:: Markov, R. V.
Plekhanov, A. I.
Shalagin, A. M.
Tematy:: 42.50.Hz
32.90.+a
42.50.Ct; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2030299.pdf Link otwiera się w nowym oknie
Opis:: Lasing on the sodium resonance transitions (D$\text{}_{1}$ and D$\text{}_{2}$ lines) at the superluminosity regime was observed upon the non-resonance excitation in the presence of a buffer gas. Dependences of the lasing intensity on the pump radiation intensity and its frequency detuning from the frequencies of resonance transitions were examined. It was found that under the specific experimental conditions (high buffer gas pressure, sufficiently high intensity of pump radiation) upon the large positive frequency detuning of pump radiation with respect to the frequency of resonance ("working") transition, contrary to ingrained conceptions, population inversion for the "working" transition is raised. That results in the observed phenomena.
Dostawca treści:: Biblioteka Nauki

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