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  • 1
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    Recent Progress in Many-Body Theories : Proceedings of the Third International Conference on Recent Progress in Many-Body Theories Held at Odenthal-Altenberg, Germany August 29 – September 3, 1983 (1984)
    Berlin ; Heidelberg : Springer
    Details
    ISBN: 9783540129240
    URL: http://www.springerlink.com/openurl.asp?genre=book&isbn=978-3-540-12924-0
    Language: English
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    E-BOOK
  • 2
    Electronic Resource
    Electronic Resource
    Alpha-cluster probability in nuclear matter (1967)
    Springer
    The European physical journal 203 (1967), S. 91-116 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An attempt is made to determine the probability of finding a nucleon, in the independent pair model of nuclear matter, as a member of an alpha-particle cluster. Approximate solutions of the Bethe-Goldstone equation furnish analytical expressions for the two-particle correlations of nuclear matter; the potential of Gomeset al. (hard core and attractive square well) is used taking into account the influence of the pair's total momentum. From these functions an approximate four-particle density matrix is constructed. Computation of its overlap integral with the alpha-particle wave function ofMang leads to the alpha-cluster probability as a function of the particle density. For extreme dilution the independent pair model fails. If our results for higher densities, however, are taken to supplement those ofClark andWang, we may conclude that, in addition to the alpha particles they find in the surface of heavy nuclei, a like number occurs at higher densities, the sharp boundary of their completely clustered surface shell being smeared out. In Appendix C we note the results on the energy per nucleon of nuclear matter derived from our wave functions. It turns out that properly taking into account the total momentum of each pair amounts to a correction of several MeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326064
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Inelastic electron scattering from nuclear matter (1968)
    Springer
    The European physical journal 212 (1968), S. 248-265 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The response function, which is directly related to the cross section for inelastic scattering of electrons from nuclear matter, is calculated with the help of a time-dependent perturbation theory using a separable potential. All diagrams through second order in the interaction are computed and their contributions compared. The self-energy problem is examined, and it is concluded that a Hartree-Fock approximation is preferable to one which attempts to takeK-matrix insertions into account. Results for the response function are compared with those of previous workers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01420945
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  • 4
    Electronic Resource
    Electronic Resource
    Grundzustand eines Fermi-Gases mit hard-sphere-Wechselwirkung (1962)
    Springer
    The European physical journal 166 (1962), S. 243-256 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decomposition of the ground state wave function of a Fermi gas interacting via hard core potentials into cluster functionsS n leads to a systematic expansion of wave function and energy in powers of the parameterc=P F r c (r c =hard core radius,P F =Fermi momentum). For instance,S n has the order of magnitudec n-λ-1, if λ=number of Fermion coordinates with distances smaller thanr c . The first three energy terms agree with the ones given by other authors. Any occurrence of singular terms in the intermediate steps of the derivation can be avoided
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01380771
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  • 5
    Electronic Resource
    Electronic Resource
    Neutron-proton interaction and nuclear binding energy (1965)
    Springer
    The European physical journal 186 (1965), S. 452-462 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of the neutron-proton interactions on nuclear binding energiesB(N, Z) has been investigated. Certain linear combinations of theB(N, Z) which can be interpreted as neutron-proton pairing energies have been computed for Sn and Sb isotopes and compared with experimental data. The coupling constants can be determined as well as some spins, parities and energies of levels of odd-odd nuclei predicted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381579
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  • 6
    Electronic Resource
    Electronic Resource
    On three particle stripping reactions (1969)
    Springer
    The European physical journal 220 (1969), S. 45-65 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The formalism for the coupled-channel analysis of stripping reactions of complex nuclear projectiles by nuclei is presented. The general adiabatic approximation is developed. The indirect transitions that are considered are those which arise via intermediate rotational excitations of the target and product nuclei, i.e. the adiabatic approximation for rotational bands is used. At the same time the generalized DWBA procedure is considered for the intrinsic states. Also the antisymmetrization problem is solved. A new method for the calculation of the matrix elements of the (α,n) stripping reaction with finite range effective forces is developed. The method is based on an expansion of the radial functions which describe the relative motion in terms of harmonic oscillator wave functions multiplied by a Gauss one. Effective forces of Gauss type are assumed between the outgoing neutron and each captured nucleon
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394409
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  • 7
    Electronic Resource
    Electronic Resource
    Intensities and correlations in two-mode lasers near threshold (1973)
    Springer
    Applied physics 1 (1973), S. 257-261 
    Details
    ISSN: 1432-0630
    Keywords: Laser ; Photon correlation ; Phase transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Static photon intensities and correlations, intensity linewidths, and transient behaviour of a two-mode laser near and between the modes' thresholds have been calculated as functions of external pumping, of the coupling strength between the modes, and of detuning. Several curves, summarizing our results, are reported and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00889772
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  • 8
    Electronic Resource
    Electronic Resource
    Comparison of the structure of Jastrow and exact many fermion theories (1976)
    Springer
    The European physical journal 279 (1976), S. 271-273 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The structure of Jastrow and exact many body theory (in expS-form) are compared. The results are: 1. The correct linked clusters can be computed in terms of Jastrow correlation functions; 2. especially the Bethe-Goldstone (or defect) wave functions are defined uniquely and differ from those used in former comparisons; 3. one should use the (Jastrow) “model energy” instead of the expectation value thereby avoiding violation of the Pauli principle and some problems with higher order terms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408298
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  • 9
    Electronic Resource
    Electronic Resource
    Expectation values and density matrices in the Coupled-Cluster theory (1983)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 24 (1983), S. 79-84 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A scheme for calculating expectation values in coupled-cluster wave functions is given. The unlinked terms originating from the norm of the wave function are eliminated. Hermiticity and trace conditions for the density matrices are exhibited in such a way as to guarantee their conservation in any reasonable truncation scheme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560240107
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  • 10
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    Coupled cluster description of pion-nucleon systems (1986)
    American Physical Society
    Details
    Publication Date: 1986-04-01
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society
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