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  • Artikel: DFG Deutsche Nationallizenzen  (9)
  • 2020-2024
  • 2020-2023
  • 2000-2004  (9)
  • 1965-1969
  • 1930-1934
  • 1910-1914
  • 1890-1899
  • 1880-1889
  • 1860-1869
  • 1840-1849
  • 2020
  • 2003  (6)
  • 2001  (3)
  • 1913
  • 1895
  • 1892
  • 1886
  • 1864
  • 1860
  • O317  (3)
  • PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments  (3)
  • PACS. 32.80.Pj Optical cooling of atoms; trapping – 42.50.Vk Mechanical effects of light on atoms, molecules, electrons, and ions  (3)
  • TP13  (3)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (9)
Materialart
Erscheinungszeitraum
  • 2020-2024
  • 2020-2023
  • 2000-2004  (9)
  • 1965-1969
  • 1930-1934
    • +
Jahr
  • 2020
  • 2003  (6)
  • 2001  (3)
  • 1913
  • 1895
    • +
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Controllability of a class of hybrid dynamic systems (III)—Multiple time-delay case (2003)
    Springer
    Applied mathematics and mechanics 24 (2003), S. 1063-1074 
    Details
    ISSN: 1573-2754
    Schlagwort(e): hybrid dynamic system ; switched linear system ; time-delay ; controllability ; controllable set ; switching sequence ; switching path ; TP13 ; TP273 ; O317 ; 93B05 ; 93B27 ; 93C99
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Mathematik , Physik
    Notizen: Abstract The controllability for switched linear systems with time-delay in controls is first investigated. The whole work contains three parts. This is the third part. The definition and determination of controllability of switched linear systems with multiple time-delay in control functions is mainly investigated. The sufficient and necessary conditions for the one-periodic, multiple-periodic controllability of periodic-type systems and controllability of aperiodic systems are presented, respectively. Finally, the case of distinct delays is discussed, it is shown that the controllability is independent of the size of delays.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02437638
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  • 2
    Digitale Medien
    Digitale Medien
    Controllability of a class of hybrid dynamic systems (II)—Single time-delay case (2003)
    Springer
    Applied mathematics and mechanics 24 (2003), S. 1051-1062 
    Details
    ISSN: 1573-2754
    Schlagwort(e): hybrid dynamic system ; switched linear system ; time-delay ; controllability ; controllable set ; switching sequence ; switching path ; TP13 ; TP273 ; O317 ; 93B05 ; 93B27 ; 93C99
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Mathematik , Physik
    Notizen: Abstract The controllability for switched linear systems with time-delay in controls is first investigated. The whole work contains three parts. This is the second part. The definition and determination of controllability of switched linear systems with single time-delay in control functions is mainly investigated. The sufficient and necessary conditions for the oneperiodic, multiple-periodic controllability of periodic-type systems and controllability of periodic systems are presented, respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02437637
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  • 3
    Digitale Medien
    Digitale Medien
    Lifetime measurements of some levels belonging to the 3p 5nd ( , 5, 6, 7) configuration of ArI (2003)
    Springer
    The European physical journal 23 (2003), S. 229-231 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: Lifetimes of some 3p5nd (n = 4, 5, 6, 7) levels of neutral argon have been measured by high frequency deflection technique with a delayed coincidence single photon counting arrangement. The measurements have been performed under conditions where pressure dependent effects are negligible. Lifetimes of some of the levels have been measured for the first time. The results have been compared with other experimental and theoretical values.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjd/e2003-00078-8
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Atom optics with rotating Bose-Einstein condensates (2003)
    Springer
    The European physical journal 22 (2003), S. 385-391 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 32.80.Pj Optical cooling of atoms; trapping – 42.50.Vk Mechanical effects of light on atoms, molecules, electrons, and ions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: The atom optics of Bose-Einstein condensates containing a vortex of circulation one is discussed. We first analyze in detail the reflection of such a condensate falling on an atomic mirror. In a second part, we consider a rotating condensate in the case of attractive interactions. We show that for sufficiently large nonlinearity the rotational symmetry of the rotating condensate is broken.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjd/e2003-00044-6
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  • 5
    Digitale Medien
    Digitale Medien
    Theoretical transition probabilities and lifetimes in nickel-like Se , Y and Sn ions (2003)
    Springer
    The European physical journal 23 (2003), S. 5-13 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: The 17 levels of the 3 d 10 , 3 d 9 4 s and 3 d 9 4 p configurations, and the electric-dipole transitions among these levels are calculated for the three nickel-like ions Se6+, Y11+ and Sn22+ by using large-scale multiconfiguration Dirac-Fock wavefunctions. From these computations, the excitation energies and transition probabilities as well as the lifetimes of 3 d 9 4 p levels are derived, including all dominant effects of relativity, correlation and of the rearrangement of the electron density within the same framework. Comparison is made with the scarce number of experimental data and previous semi-empirical computations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjd/e2003-00008-x
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  • 6
    Digitale Medien
    Digitale Medien
    Controllability of a class of hybrid dynamic systems (I)—Basic properties and preliminary results (2003)
    Springer
    Applied mathematics and mechanics 24 (2003), S. 1041-1050 
    Details
    ISSN: 1573-2754
    Schlagwort(e): hybrid dynamic system ; switched linear system ; time-delay ; controllability ; generalized cyclic invariant subspace ; switching sequence ; switching path ; TP13 ; TP273 ; O317 ; 93B05 ; 93B27 ; 93C99
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Mathematik , Physik
    Notizen: Abstract The controllability for switched linear system with time-delay in controls was first investigated. The whole work contains three parts. This is the first part, including problem formulation and some preliminaries. Firstly, the mathematical model of switched linear systems with time-delay in control functions was presented. Secondly, the concept of column space, cyclic invariant subspace and generalized cyclic invariant subspace were introduced. And some basic properties, such as separation lemma, were presented. Finally, a basic lemma was given to reveal the relation between the solution set of a centain integral equations and the generalized cyclic invariant subspace. This lemma will play an important role in the determination of controllability. All these definitions and lemmas are necessary research tools for controllability analysis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02437636
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  • 7
    Digitale Medien
    Digitale Medien
    Radiative lifetimes of 7d, 8d 1D2 excited states of Hg I (2001)
    Springer
    The European physical journal 13 (2001), S. 159-163 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: Radiative lifetimes of 7d, 8d 1 D 2 excited states of Hg I are measured using pulsed two-photon excitation from the ground [Xe]5d 106s 2 1 S 0 mercury state, detecting the decay of the laser-induced fluorescence. The results are compared with theoretical values, obtained by means of a Hartree-Fock single configuration method, taking into account electron configuration interaction. The radiative lifetime value dependence on the effective principal quantum number for the nd 1 D 2 series is analyzed and compared with the quantum defect dependence.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100530170262
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  • 8
    Digitale Medien
    Digitale Medien
    Single-beam optical bottle for cold atoms using a conical lens (2001)
    Springer
    The European physical journal 14 (2001), S. 373-376 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 32.80.Pj Optical cooling of atoms; trapping – 42.50.Vk Mechanical effects of light on atoms, molecules, electrons, and ions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: We report a new method to generate an optical dipole potential with a null intensity region surrounded in all directions by light walls. This is achieved with a simple scheme based on a conical lens. Applications to optical trapping of neutral atoms are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100530170205
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  • 9
    Digitale Medien
    Digitale Medien
    A continuous cold atomic beam from a magneto-optical trap (2001)
    Springer
    The European physical journal 15 (2001), S. 245-249 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 32.80.Pj Optical cooling of atoms; trapping – 42.50.Vk Mechanical effects of light on atoms, molecules, electrons, and ions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: We have developed and characterized a new method to produce a continuous beam of cold atoms from a standard vapour-cell magneto-optical trap (MOT). The experimental apparatus is very simple. Using a single laser beam it is possible to hollow out in the source MOT a direction of unbalanced radiation pressure along which cold atoms can be accelerated out of the trap. The transverse cooling process that takes place during the extraction reduces the beam divergence. The atomic beam is used to load a magneto-optical trap operating in an ultra-high vacuum environment. At a vapour pressure of 10-8mbar in the loading cell, we have produced a continuous flux of 7×107atoms/s at the recapture cell with a mean velocity of 14 m/s. A comparison of this method with a pulsed transfer scheme is presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100530170172
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