Now showing items 851-860 of 886
Spin-polarized low-energy positron beams and their applications
(Springer-Verlag, 1987-08)
The production and use of low-energy (100 eV to 5 keV) high-intensity, spin-polarized positron beams is reviewed. Methods for obtaining beams with high polarization are discussed. Applications include studies of the ...
A posteriori image-correcting "deconvolution" by holographic fourier-transform division
(Elsevier, 1967-07-31)
Division of spatial field distributions in the Fourier-transform domain for "resolution-retrieving", "corrective" image deconvolution of the "smearing" resulting from extended "instrument functions" in optical imaging, ...
Deposition and Properties of Superconducting MgB 2 Thin Films
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 2003-10)
The recently discovered superconductor MgB 2 with T c at 39 K has great potential in superconducting electronics. In this paper, we review the deposition techniques used for MgB 2 thin films in the light of a thermodynamic ...
Growth and properties of quasiperiodic heterostructures
(Elsevier, 1987-02-02)
We have recently demonstrated the MBE growth of heterostructures in which layers of GaAs and AlAs were deposited in a Fibonacci sequence. This yields a quasiperiodic structure with the ratio of incommensurate periods equal ...
Electric field effects on intersubband transitions in quantum well structures
(Elsevier, 1987)
We report on a Raman scattering study of the electric-field dependence of c0 --> c1 intersubband transitions of electrons in a 264 A GaAs- Al0.3Ga0.7As quantum-well structure. The measured Stark shifts are in very good ...
Growth and properties of In0.52Al0.48As/In0.53Ga0.47As, GaAS: In and InGaAs/GaAs multilayers
(Elsevier, 1987-02-02)
We have investigated the properties of some In-containing materials and heterostructures grown by molecular beam epitaxy on GaAs and InP substrates. Photoluminescence spectra of InGaAs/InAlAs quantum wells have been related ...
Die Coulomb-Energien leichter Atomkerne
(Springer-Verlag, 1960-04)
A compilation of the known data on Coulomb energy differences of isobaric doublets and isobaric triplets is given. Plots of the Coulomb energy differences versus ¯Z/A 1/3 with ¯Z =( Z 1 + Z 2 )/2 show an analogous shell ...
Ricci-Flat Metrics, Harmonic Forms and Brane Resolutions
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2003-01)
We discuss the geometry and topology of the complete, non-compact, Ricci-flat Stenzel metric, on the tangent bundle of S n+1 . We obtain explicit results for all the metrics, and show how they can be obtained from first-order ...
M-theory on G2 Manifolds Moduli to Phenomenology
(2022)
String theories are good candidates for unifying the Standard Model and general relativity. M theory is the non-perturbative limit of all string theories. Moreover, it has been shown that M theory should be compactified ...