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  • Articles: DFG German National Licenses  (4)
  • 32.20.J  (2)
  • 33.20.Ni  (2)
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  • Articles: DFG German National Licenses  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Narrow-band extreme-ultraviolet laser radiation tunable in the range 90.5–95 nm (1993)
    Springer
    Applied physics 57 (1993), S. 411-416 
    Details
    ISSN: 1432-0649
    Keywords: 42.65.Ky ; 33.20.Ni ; 95.30.Ky
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Tunable, narrowband extreme ultraviolet radiation in the range 90.5–95 nm with only limited intensity variations is produced by frequency-tripling ultraviolet light from a frequency-doubled dye laser in a gas-jet of xenon. Acetylene gas is found to be an efficient medium for third-harmonic generation in this wavelength range as well. The extreme-ultraviolet radiation is applied in a spectroscopic study of the b 1 II u , v=6−8 and v=10−12, o 1 II u , v=0 and b′1Σ u + , v=9 states of molecular nitrogen. From linewidth measurements a value k p=6×1010 s−1 for the predissociation rate of the b 1 II u , v=11 state is deduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00357384
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High-resolution laser spectroscopy on H2 at 97–98 nm (1994)
    Springer
    Applied physics 59 (1994), S. 307-310 
    Details
    ISSN: 1432-0649
    Keywords: 33.20.Ni ; 62.65.Ky
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A narrowband tunable eXtreme UltraViolet (XUV) laser source is used for a high resolution study of the Lyman (B 1 Σ u + ™X 1 Σ g + ) band system of molecular hydrogen. Seven rotational transitions of two vibrational bands, (10,0) and (11,0), in the wavelength range from 97.2–98.3 nm have been investigated for the first time under sub-Doppler molecular beam conditions. A calibration procedure using the I2 standard in the visible yielded an absolute frequency accuracy of 0.02 cm−1. The obtained H2 transition frequencies provide a calibration standard in the extreme ultraviolet wavelength region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081398
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The stark effect in the 6snf Rydberg series of barium (1985)
    Springer
    The European physical journal 322 (1985), S. 211-219 
    Details
    ISSN: 1434-601X
    Keywords: 32.20.J ; 32.60.S
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The polarizabilities of the barium 6snf 3 F 2 levels with principal quantum numbern ranging from 11 to 40 have been measured in a high resolution laser-atomic-beam experiment. In Coulomb approximation the contributions to the polarizabilities of all known even-parity levels connected with the3 F 2 levels via the electric dipole operator have been calculated. In this way information on the to a large extent unknown 6sng 3 G 3 Rydberg series is extracted. The results support earlier observations of a perturbation of this series in betweenn = 18 and 19, but no evidence has been found for a perturbation nearn = 14.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411885
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Avoided level crossings in bound Rydberg states of barium in an electric field (1989)
    Springer
    The European physical journal 13 (1989), S. 107-113 
    Details
    ISSN: 1434-6079
    Keywords: 32.60.S ; 32.70 ; 32.20.J ; 32.80.B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In a CW laser experiment on bound Rydberg states of barium electric-field-induced level crossings were studied. A regular type of avoided crossing of 6snf 3 F 2 and 6s (n+4)s 3 S 1 levels (n≈60,M=0) was observed under circumstances where the minimum separation was larger than the linewidth involved. This type of crossing could be reproduced using a diagonalisation procedure of the total energy matrix in the presence of the field. However, in the case of avoided crossings of the 6snf 3 F 2 and 6s(n+4)p 1 P 1 sublevels, where the minimum separation was smaller than the linewidth of the3 F 2 level, an interference-like profile was recorded. An important feature in the explanation of this interference-like profile turned out to be the broadening of the3 F 2 level by small field inhomogeneities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398579
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    Paper (German National Licenses)
    Fulltext
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