Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Optics Communications 26 (1978), S. 199-201 
    ISSN: 0030-4018
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters 18 (1965), S. 276-277 
    ISSN: 0031-9163
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 28 (1968), S. 4-5 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica B+C 124 (1984), S. 282-290 
    ISSN: 0378-4363
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 208 (1968), S. 104-104 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 241 (1971), S. 244-257 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Zusammenfassung Die Übertragung von Polarisation bei sensibilisierenden Stößen zwischen den 3p 2 P-Zuständen des Natriums wurde durch getrennte Beobachtung der zirkular polarisierten Komponenten des FluoreszenzlichtsD 1σ+,D 1σ−,D 2σ+ undD 2σ− nachgewiesen. Ein Wirkungsquerschnitt für die Übertragung von Polarisation 〈J z 〉 wurde definiert und Werte desselben für die verschiedenen Edelgase aus den Messungen hergeleitet. Durch Anlegen eines magnetischen Feldes parallel zur Einstrahlungsrichtung wird der Kernspin entkoppelt und die für diesen Fall theoretisch vorhergesagte Inversion der übertragenen Polarisation tatsächlich beobachtet. Auffällig bleibt, daß mit steigendem Druck die übertragene Polarisation schneller verschwindet, als sich durch die gleichzeitig stattfindende Stoßdepolarisation motivieren läßt. Anzumerken ist ferner, daß die Übertragung von Polarisation auch zwischen präzedierenden Polarisationsvektoren nachgewiesen wurde und daß in Kooperation mit Prof. L. Krause und B. Niewitecka, Windsor, Kanada, dieses als „Hanleeffekt in der sensibilisierten Fluoreszenz” gedeutete Phänomen näher erforscht wurde15.
    Notes: Abstract The transfer of magnetic polarization from state 3p 2 p 1/2 to state 3p 2 p 3/2 sensitizing collisions of sodium atoms with noble gas atoms has been observed. Sodium atoms were excited by absorption ofD 1σ+-quanta. When buffer gas was added to the sodium vapour, unequal amounts ofD 2σ+ andD 2σ− quanta could be detected in the fluorescent light. The difference of the amounts turned out to be proportional to the polarization transferred. The measurement of this difference as a function of the buffer gas pressure provided a method of determining the cross-sections of the polarization transfer. Values of the cross-sections are 22, 24, 26, 20, 23 Å2 for the buffer gases He, Ne, Ar, Kr, Xe, respectively. A preliminary investigation shows that the sign of the polarization transferred is reversed when the vapour is exposed to a strong magnetic field acting along the incident light beam.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 204 (1967), S. 501-513 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Optical pumping of sodium vapor withD 2-light causes a rise of optical transparency if complete collision-induced mixing takes place among the sublevels of the excited2 P-states. It causes a drop of optical transparency if there would be no mixing in the excited states. It causes no change of optical transparency if excited-state mixing is as strong as the condition 2T=3τ predicts,T being the mean collision time, τ the mean life time of the excited states. The latter case can be realized by certain buffer gas pressures. These pressures have been measured for the gases helium, neon, and argon. From these pressures excited state-mixing cross sections have been deduced by means of the quoted condition. Finally the so far used “uniform” mixing model has been critically revised. A more realistic model is proposed which ascribes excited-state-mixing to scattering phase shifts between the molecularσ- andπ-states into which the atomic2 P-state splits during the collision. Nevertheless, the condition 2T=3τ is not seriously altered even in this refined model.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 255 (1972), S. 14-24 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Optical pumping withD 2-light provides an excellent means for studying collisional relaxation in the excited2 P 3/2-state of alkali atoms. Collisional relaxation of orientations in that state very sensitively affects the spin orientation in the ground state. All these orientations may be easily created by absorption of σ+- or σ{−{-light. At a certain strength of the relaxation realized by a certain buffer gas pressure, the spin orientation in the ground state even vanishes, providedD 2-light is used for excitation. The condition for this situation is derived from the set of rate equations which governs the evolution of all the orientations involved. These conditions very markedly depend on the nuclear spin valueI. The validity of this dependence has been checked by magnetic decoupling of the nuclear spin and observing the associated shift of the pressure for vanishing spin orientation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 275 (1975), S. 339-346 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By photon absorption from a monomode dye-laser beam a spatially ordered velocity distribution (‘atomic beam’) of sodium atoms excited to the 3p 2 P 1/2-state, is created. It is predicted theoretically that in collisions of these atoms with atoms of a heavy foreign gas an alignment of the electronic orbital angular momentum is produced. This alignment leads to the appearance of a linear polarization in the sensitizedD 2-fluorescent light. This polarization is verified experimentally and interpreted in terms of a simplifiedT-operator. It turns out that the scattering distribution for sensitizing collision is of the wide-angle type.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 295 (1980), S. 1-5 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the139La II line 5d 2 3 F→5d4f 3 F 4 0 atλ=579.8 nm has been investigated by means of collinear laser spectroscopy on a fast La+ beam. AmongΔF=0, ±1 hyperfine transitions,gDF=±2 transitions have been observed. An interpretation of theseΔF=±2 transitions as well as their relative line strengths is given by means of a three-quantum process.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...