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  • 1995-1999  (4)
  • 1990-1994  (12)
  • 1975-1979  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Fluorescence decay of indole in water (1990)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 12 (1990), S. 1691-1695 
    Details
    ISSN: 0392-6737
    Keywords: Photoluminescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The time-resolved fluorescence decay of indole in water does not provide evidence for a short-lifetime component (approximation 0.7 ns) as claimed in a recent report by Giorgianniet. al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451268
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A noncommutative geometric model with horizontal family symmetry (1995)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 36 (1995), S. 1111-1122 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The important role of multiple fermionic families in noncommutative geometry is investigated by introducing a horizontal symmetry into the model building scheme. It is demonstrated that this can be done consistently. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.531108
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Diffusion-controlled reactions: transient effects in the fluorescence quenching of indole and N-acetyltryptophanamide in water (1990)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 94 (1990), S. 2908-2914 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100370a033
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Isotopic lines of SiO in sunspots (1978)
    Springer
    Solar physics 59 (1978), S. 353-356 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract As the isotopic shift for the vibration rotation band is generally much larger than the isotopic shift for the corresponding electronic transitions and thus facilitating separation of isotopic lines, the vibration rotation bands of SiO may find use in the determination of isotopic abundance ratio Si28 ∶ Si29 ∶ Si30. To help identify the isotopic lines of SiO the wavenumbers for Si29O16 and Si30O16 have been calculated with an uncertainty of ±0.05 cm−1. Taking note of the fact that SiO shows strong vibration rotation bands in the spectra of some cool stars the equivalent width calculations for P(40) and R(40) lines of the 1-0 and 2-1 vibration rotation bands of Si29O16 and Si30O16 have been made at the centre of the disc for the model ZSM-74 using two values of isotopic abundance ratio and three values of dissociation energy. The search for the isotopic lines of SiO near 7 to 8μm is recommended in low noise centre to limb sunspot spectrum scans with a view to help improve the isotopic ratio Si28 ∶ Si29 ∶ Si30 and oscillator strengths for the vibration-rotation transitions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00951839
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    On the O2 Schumann-Runge band system in sunspots (1979)
    Springer
    Solar physics 63 (1979), S. 79-81 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The visibility in the umbral ultraviolet spectrum of the O2 Schumann-Runge absorption band system has been explored. It is found that the band system may be visible in high dispersion sunspot spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00155696
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  • 6
    Electronic Resource
    Electronic Resource
    On the presence of SH in the sunspot spectrum (1979)
    Springer
    Solar physics 62 (1979), S. 69-75 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The expected equivalent widths of individual rotational lines of the most intense Q 2 branch of the 0-0 band of the A 2Σ-X2Πi; system of S32H and S34H have been calculated in the umbral spectrum for five disk positions using Zwaan's (1974) sunspot model. Percentage abundance of S34 in the terrestrial case has been considered valid in our calculations. Strong lines of S32H and S34H of the A-X band system should be detectable in the sunspot spectrum. The molecule SH may play a possible role as a major opacity source in the ultraviolet spectrum of sunspots along with the molecule OH in the upper layers (up to τ 0.5μm = 1.0) wherefrom most of the continuum arises. Study of this molecule in the umbral spectrum may also provide the solar isotopic abundance ratio N(S32)/N(S34).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00150132
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  • 7
    Electronic Resource
    Electronic Resource
    Penguin effects induced by the two-Higgs-doublet model and charmlessB-meson decays (1991)
    Springer
    The European physical journal 52 (1991), S. 97-103 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nonstandard physical effects through the penguin diagram induced by the charged Higgs scalar contribution in the two-Higgs-doublet model are analysed. Since non-leptonicB-decay processes to final states consisting ofs+s+ $$\bar s$$ are induced only through the penguin diagram they are important tests of such contributions. We compare these decays including the non-standard two-Higgs-doublet contribution with the standard model results, which arise from the magnetic gluon transistion term. The charged Higgs contribution can give a sizable enhancement to the branching fractions ofB-meson charmless decay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412331
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Quaternionic quantum mechanics is consistent with complex quantum mechanics (1992)
    Springer
    International journal of theoretical physics 31 (1992), S. 965-981 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Quaternionic quantum mechanics is investigated in the light of the great success of complex quantum mechanics. It is shown that to reproduce the results of complex quantum mechanics, quaternionic quantum mechanics must contain complex quantum mechanics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00675088
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Global effects in quaternionic quantum field theory (1996)
    Springer
    Foundations of physics 26 (1996), S. 1591-1599 
    Details
    ISSN: 1572-9516
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present some striking global consequences of a model quaternionic quantum field theory which is locally complex. We show how making the quaternionic structure a dynamical quantity naturally leads to the prediction of cosmic strings and nonbaryonic hot dark matter candidates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02282122
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  • 10
    Electronic Resource
    Electronic Resource
    Nonstandard signature of spacetime, superstrings, and the split composition algebras (1990)
    Springer
    Letters in mathematical physics 19 (1990), S. 65-71 
    Details
    ISSN: 1573-0530
    Keywords: 22E45
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract It has been established that the covering group of the Lorentz group in the dimensions D=3, 4, 6 and 10, can be expressed in a unified way, based on the four composition-division algebras ℝ, ℂ, ℚ and $$\mathbb{O}$$ . If the division algebras in the construction of the covering groups of the Lorentz groups in D=3, 4, 6 and 10 are replaced by the split composition algebras, then the sequence of groups $$\widetilde{{\text{SO}}}{\text{(2,2)}}$$ , $$\widetilde{{\text{SO}}}{\text{(3,3)}}$$ and $$\widetilde{{\text{SO}}}{\text{(5,5)}}$$ results. Classical superstrings embedded in such spacetimes can be defined, and the split composition algebras provide a natural framework for their description.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00402262
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