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Electron and solid state physics
Electron and solid state physics - reflected light, Raman effects, solid and liquid optical properties, spectroscopy, Brillouin effects, and carbon dioxide laser
Calculation of functionals of matrices arising in solid state physics and quantum chemistry
Analytic function calculation of matrices in solid state physics and quantum chemistry
Vacuum ultraviolet radiation and solid state physics Semiannual status report no. 7, period ending 31 Aug. 1965
Vacuum ultraviolet radiation and solid state physics - optical constants for barium and silver surfaces and thin films
Vacuum ultraviolet radiation and solid state physics semiannual status reports no. 1, 2, and 3, period ending 28 feb. 1963
Spectroscopic instruments for vacuum ultraviolet radiation study
Research program in nuclear and solid state physics
The spectra of prompt gamma rays emitted following nuclear pion absorption were studied to determine the states of excited daughter nuclei, and the branching ratios for these states. Studies discussed include the negative pion absorption of C-12, S-32, and N-14; and the positive pion absorption on 0-16. Abstracts of papers submitted to the conference of the American Physical Society are included.
Research program in nuclear and solid state physics
The survey of negative pion absorption reactions on light and medium nuclei was continued. Muon spin precession was studied using an iron target. An impulse approximation model of the pion absorption process implied that the ion will absorb almost exclusively on nucleon pairs, single nucleon absorption being suppressed by energy and momentum conservation requirements. For measurements on both paramagnetic and ferromagnetic iron, the external magnetic field was supplied by a large C-type electromagnet carrying a current of about 100 amperes.
Material science and solid state physics studies with positive muon spin precession
The hyperfine field on the muon, B sub hf, at interstitial sites in dilute Fe(Al) alloys was measured for four different concentrations of Al and as a function of temperature by the muon spin rotation method. The magnitude of B sub hf, which is negative, decreases at rates ranging from 0.09 + or - 0.03% per at.% Al at 200 K to an asymptotic limit of 0.35 + or - far above 440 K. This behavior shows that sites near the Al impurity are weakly repulsive to the muon, with an interaction potential of 13 + or - 3 meV. In order to fit the temperature dependence of the hyperfine field, it is necessary to hypothesize the existence of a small concentration of unidentified defects, possibly dislocations, which are attractive to the muon. Although the Al impurity acts as a non-magnetic hole in the Fe lattice, the observed decrease in B sub hf is only 35% of the decrease in the bulk magnetization. It is concluded that B sub hf is determined mainly by the enhanced screening of conduction electrons in Fe and Fe(Al). Since the influence of the Al impurity on the neighboring Fe monents is very small, most of the change in B sub hf is therefore attributed to the increase in conduction electron polarization of the Al impurity.
Activities of the Solid State Physics Research Institute
Three research programs are reviewed. These programs are muon spin rotation, studies of annealing in gallium arsenide and Hall effect studies in semiconductors. The muon spin rotation work centers around the development of a facility at the Alternating Gradient Synchrotron of BNL. Studies of annealing in GaAs concerns itself with the measurement of depolarization in GaAs. The Hall effect studies of proton damaged semiconductors provide new information on the nature of defects and dislocations in GaAs.
Activities of the Solid State Physics Research Institute
Topics addressed include: muon spin rotation; annealing problems in gallium arsenides; Hall effect in semiconductors; computerized simulation of radiation damage; single-nucleon removal from Mg-24; and He-3 reaction at 200 and 400 MeV.
Research investigation directed toward extending the useful range of the electromagnetic spectrum Progress report, 1 May - 31 Oct. 1966
Scientific research in atomic physics, solid state physics, and radio and X-ray astronomy
Space related scientific and technical investigations Final progress report, 1 Sep. 1967 - 29 Feb. 1968
Research projects in low temperature physics, solid state physics, atomic physics, comet physics, and physics of space related flow problems
Research on the physics of solid materials semiannual status report no. 12, 1 nov. 1964 - 30 apr. 1965
Solid state physics, physical metallurgy, and chemistry of solids - development of advanced crystal growing facilities for materials science and solid state physics groups
Research activity conducted at Electronic Sciences Laboratory, USC Consolidated semiannual progress report no. 2, 1 Apr. - 30 Sep. 1965
Solid state physics, plasma physics, and information sciences research activities report
Total research activity related to the science of materials Fourth annual technical report, Jul. 1, 1964 - Jun. 30, 1965
Survey of research in materials science and solid state physics
International Conference on Vacuum Ultraviolet Radiation Physics, 8th, Lunds Universitet, Sweden, Aug. 4-8, 1986, Proceedings
The interactions of VUV radiation with solids are explored in reviews and reports of recent theoretical and experimental investigations from the fields of atomic and molecular physics, solid-state physics, and VUV instrumentation. Topics examined include photoabsorption and photoionization, multiphoton processes, plasma physics, VUV lasers, time-resolved spectroscopy, synchrotron radiation centers, solid-state spectroscopy, and dynamical processes involving localized levels. Consideration is given to the fundamental principles of photoemission, spin-polarized photoemission, inverse photoemission, semiconductors, organic materials, and adsorbates.
RESEARCH ON THE PHYSICS OF SOLID MATERIALS.
Research in solid state physics, crystal studies, alloys, oxidation and precipitation reactions
Recent instrumentation for the optical studies of solids in the vacuum ultra-violet
Optical studies of solids in vacuum ultraviolet - solid state physics