Design and qualification of the Extreme-UV Imaging Telescope (EIT)

(1995)

MR1325693,Huang, Hou-Cheng and Usmani, Asif S.,Finite element analysis for heat transfer

in Mathematical Reviews [=MR] (1994)

MR1125988,Salmenjoki, Kimmo ,On numerical methods for shape design problems

in Mathematical Reviews [=MR] (1991)

Le télescope pour l'ultraviolet extrême EIT

in Nouvelles de la Science et des Technologies (1990), 8

MR941586, Multicriteria optimization in engineering and in the sciences, Stadler

in Mathematical Reviews [=MR] (1988)

FN op het tijdstip van de CAD

in PANINFORMATIC (1985)

Vibration d'une plaque console vrillée: influence de l'angle de vrillage sur les fréquences propres et les modes propres; comparaison de la méthode de calculs par éléments finis SAMCEF avec l'expérience et d'autres codes de calculs

Report (1983)

Single-particle potential in a relativistic Hartree-Fock mean field approximation

in Nuclear Physics A (1981), 365

A relativistic Hartree-Fock mean field approximation is investigated in a model in which the nucléon field interacts with scalar and vector meson fields. The Hartree-Fock potential felt by individual ... [more ▼]

A relativistic Hartree-Fock mean field approximation is investigated in a model in which the nucléon field interacts with scalar and vector meson fields. The Hartree-Fock potential felt by individual nucléons enters in a relativistic Dirac single-particle equation. It is shown that in the case of symmetric nuclear matter one can always find a potential which is fully equivalent to the most general mean field and which is only the sum of a Lorentz scalar, of one component of a Lorentz tensor and of the fourth component of a Lorentz vector. A non-relativistic potential is derived which yields exactly the same single-particle energies and elastic scattering phase shifts as the relativistic Hartree-Fock potential. Analytical results are presented in the case of nuclear matter. A local density approximation is constructed which enables one to consider finite nuclei. The input parameters of the model can be chosen in such a way that the empirical saturation properties of nuclear matter are well reproduced. Good agreement is obtained between the calculated non-relativistic potential and the empirical value of the real part of the optical-model potential at low and at intermediate energy. At intermediate energy, the wine-bottle bottom shape which had previously been found for the potential in the framework of the relativistic Hartree approximation is maintained when the Fock contribution is included. [less ▲]

Optical-model potential in a relativistic quantum field model

in Physical Review. C : Nuclear Physics (1980), 22

The average nucleon-nucleus potential at low and medium energy is investigated in the framework of a relativistic quantum field model. Using the same input parameters as Brockmann in his recent study of ... [more ▼]

The average nucleon-nucleus potential at low and medium energy is investigated in the framework of a relativistic quantum field model. Using the same input parameters as Brockmann in his recent study of nuclear ground states, we calculate the self-consistent relativistic Hartree potential at positive energy in the case of infinite nuclear matter and of [SUP]16[/SUP]O and [SUP]40[/SUP]Ca. This potential is the sum of a scalar operator and of the fourth component of a vector operator. We construct its Schrödinger-equivalent potential by eliminating the small component of the Dirac spinor. The central part of this Schrödinger-equivalent potential is in fair agreement with empirical values at low and intermediate energy. Particular attention is paid to the intermediate energy domain, in which the calculated potential is repulsive in the nuclear interior and attractive at the nuclear surface. This is in keeping with some empirical evidence and is similar to results found in the framework of the nonrelativistic Brueckner-Hartree-Fock approximation. The spin-orbit potential of the relativistic Hartree model is also in good agreement with empirical values. NUCLEAR REACTIONS Calculated average nuclear field of nuclear matter, [SUP]16[/SUP]O and [SUP]40[/SUP]Ca at positive energy from relativistic Hartree approximation. [less ▲]

Inelastic Effects on the pion NN vertex Function

in Proceedings of the International Conference on Nuclear Physics, Berkeley, 1980, Pg. 703. (1980)