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  • PACS. 42.50.Fx Cooperative phenomena; superradiance and superfluorescence - 03.65.Sq Semiclassical theories and applications  (2)
  • 1-vinyl-naphtalene  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Free radical copolymerization of 1-vinyl naphthalene with styrene, methyl methacrylate, and acrylonitrile (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 1096-1100 
    Details
    ISSN: 1435-1536
    Keywords: Freeradicalcopolymerization ; 1-vinyl-naphtalene ; styrene ; methylmetha-crylate ; acrylonitril ; relativereactivity ratios ; Q- ande-values
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Investigations on free radical copolymerization of 1-vinyl naphthalene (1-VNph, monomerM 2) with styrene (St), methyl methacrylate (MMA) and acrylonitrile (AN) (monomersm 1) in bulk at 60°C with AIBN as initiator are presented. Relative reactivity ratios were calculated by the Kelen-Tüdös method yielding:r st=0.70 ±0.23 andr 1−VNph=2.02 ±0.40 for system St/1-VNph;r MMA=0.32 ±0.10 andr 1−VNph=0.57 ±0.07 for system MMA/1-VNph andr AN=0.11 ±0.03 andr 1−VNph=0.45 ±0.09 for system AN/1-VNph.Q, e values for 1-VNph according to Alfrey, Price scheme were calculated toQ 1−VNph=1.02,e 1−VNph=−0.62.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01496929
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  • 2
    Electronic Resource
    Electronic Resource
    WKB for a damped spin (1998)
    Springer
    The European physical journal 3 (1998), S. 1-8 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 42.50.Fx Cooperative phenomena; superradiance and superfluorescence - 03.65.Sq Semiclassical theories and applications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The master equation for a damped spin well known from the theory of superradiance, is written as a finite-difference equation and solved by a WKB-like method. The propagator thus obtained looks like the van Vleck propagator of a certain classical Hamiltonian system with one degree of freedom. A new interpretation is provided of the temporal broadening of initially sharp probability distributions as the analogue of the spreading of the quantum mechanical wave packet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050141
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Semiclassical spin damping: Superradiance revisited (1998)
    Springer
    The European physical journal 2 (1998), S. 165-173 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 42.50.Fx Cooperative phenomena; superradiance and superfluorescence - 03.65.Sq Semiclassical theories and applications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A well known description of superradiance from pointlike collections of many atoms involves the dissipative motion of a large spin. The pertinent “superradiance master equation” allows for a formally exact solution which we subject to a semiclassical evaluation. The clue is a saddle-point approximation for an inverse Laplace transform. All previous approximate treatments, disparate as they may appear, are encompassed in our systematic formulation. A byproduct is a hitherto unknown rigorous relation between coherences and probabilities. Our results allow for generalizations to spin dynamics with chaos in the classical limit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050126
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    Paper (German National Licenses)
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