Nuclear Reactor Theory
"Nuclear Reactor Theory." Nuclear Science and Engineering, 11(3), pp. 348–349
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Metastable solid solutions with quartz-type structures on the join SiO2–MgAl2O4
Various members of a series of metastable solid solutions with a quartz-type structure and with compositions between SiO 2 and MgAl 2 O 4 have been synthesized from glass. Increasing amounts of Mg +2 and Al +3 in the quartz structure cause a gradual contraction parallel to, and a gradual expansion perpendicular to, th…
OSMOTIC ADJUSTMENT OF PLANTS TO SALINE MEDIA. I. STEADY STATE
B ernstein , L eon . (U. S. Salinity Lab., Riverside, Calif.) Osmotic adjustment of plants to saline media. I. Steady state. Amer. Jour. Bot. 48(10): 909–918. Illus. 1961.—The osmotic pressure (OP) of roots, as well as the OP of aboveground parts of cotton and pepper plants, increase pari passu with increases in the O…
Nuclear Reactor Physics
By S. E. Liverhant London and New York: John Wiley & Sons, Ltd. Pp. xiv + 447. Price 78s. This book is an introduction to the subject of reactor physics and aims to acquaint the reader with the necessary fundamental ideas and basic concepts. It assumes little knowledge of nuclear physics or mathematics and may be suit…
New Electron‐Optical Data on the Kaolinite‐Mullite Transformation
A technique is described for preparing fired kaolinites for examination by electron diffraction and electron microscopy. Specimens fired on platinum foil at 850° and 950°C. were etched while on the foil in 10% sodium hydroxide for 1 week and were then removed by a two‐stage collodion‐carbon replica. The etching is bel…
The System CaO‐Ga 2 O 3
CaO and Ga 2 O 3 form three compounds: 3CaO‐Ga 2 O 3 , CaO‐Ga 2 O 3 , and CaO‐2Ga 2 O 3 . 3CaO‐Ga 2 O 3 melts incongruently to CaO plus liquid at 1263°C.; CaO Ga 2 O 3 and CaO 2Ga 2 O 3 melt congruently at 1369° and 1504°C. respectively. Eutectics are located at the following temperatures and compositions (in mole% Ga…
POLYMORPHISM OF THE RARE EARTH SESQUIOXIDES1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPOLYMORPHISM OF THE RARE EARTH SESQUIOXIDES1I. Warshaw and Rustum RoyCite this: J. Phys. Chem. 1961, 65, 11, 2048–2051Publication Date (Print):November 1, 1961Publication History Published online1 May 2002Published inissue 1 November 1961https://pubs.acs.org/doi/10.1021/j100…
On the Theory of Mixed Conduction with Special Reference to Conduction in Silver Sulfide Group Semiconductors
A macroscopic theory of mixed conduction–partly electronic and partly ionic conduction–is developed with special reference to the conduction in silver sulfide group semiconductors. Current equations combined with continuity equation give an equation which can be reduced to a diffusion equation under simplifying assump…
TheAdhesionof SolidParticlesto SolidSurfaces, I.aReview
Studies clarifying the mechanism of small-particle adhesion were conducted to aid research in aerosol sampling, dust filtration, dust re- entrainment, and soiling phenomena. It was found that the London-van der Waals molecular forces cannot be successfully extended to quantitatively predict adhesion forces of small pa…
Defect structure and properties of pyrolytic carbons
Abstract Defects have been studied systematically in graphites prepared by the pyrolysis of methane at temperatures in the range 1600 to 2200 °C. Physical methods used included measurements of the bulk density and studies of X -ray diffraction photographs. Electronic properties examined were the electrical resistivity…
Electron and phonon scattering Thermoelectricity in potassium and alloys at very low temperatures
Abstract An experimental study has been made at very low temperatures of the thermoelectric power of potassium and alloys with sodium, rubidium and caesium as solutes. The results enable a clear separation to be made between the ‘ electron diffusion ’and‘ phonon drag' components of thermoelectric power. Comparison of…
Bound Exciton Complexes
Received 11 September 1961DOI:https://doi.org/10.1103/PhysRevLett.7.316©1961 American Physical Society
Phenomenological Discussion of Magnetic Ordering in the Heavy Rare-Earth Metals
The rare-earth metals Gd-Tm have similar crystal structures and their magnetic properties have been partially evaluated by a number of techniques. The magnetic order is complicated, showing several phases in some cases and differing considerably in the various elements. These various orderings can be explained on a mo…
Relationship Between Crystal Symmetry and Magnetic Properties of Ionic Compounds ContainingMn3+
An investigation has been made of the relationship between crystallographic symmetry and ${\mathrm{Mn}}^{3+}$ - ${\mathrm{O}}^{2\ensuremath{-}}$ - ${\mathrm{Mn}}^{3+}$ 180\ifmmode^\circ\else\textdegree\fi{} superexchange interactions in several perovskite systems. In particular, crystallographic and magnetic measureme…
THE ELECTRICAL RESISTIVITY OF Mn3ZnC BETWEEN 4.2° AND 630° K
The electrical resistivity of an alloy having approximately the composition Mn 3 ZnC has been measured between 4.2° and 630° K. From a high residual value the resistivity increases with temperature in a complicated way up to 550° K, becoming temperature independent above that point. Two anomalous regions are evident c…
A note on the structure of Zr2Co
Ttne t~pe-raruredmm.p~sit:~on$gagram a£ the ehconEullrcobalt s g s f ~m is curtent.lybeing investtgated by Pechin (1961) .Three intsrme?diata phases have brew bdentified as ZrCoz, Z r C o , and Zr2Co; at least two additional phases with as yet undefined stoichfametry e x i s t i a the cobalt-rich partion a£ the system…
Interdiffusion of Helium and Argon in a Large-Pore Graphite.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterdiffusion of Helium and Argon in a Large-Pore Graphite.R. B. Evans, Jack Truitt, and G. M. WatsonCite this: J. Chem. Eng. Data 1961, 6, 4, 522–525Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https:…
The Gaseous Oxides of the Platinum Metals
This paper reviews the experimental techniques used in the elucidation of the thermodynamics of the volatile oxides of the platinum metals in the temperature range 1200 to 1800°C. It is shown how the molecular formulae of the gases were obtained, and free energy equations of the two- term type are given for PtO 2 , Rh…
Ferromagnetic Resonance in Thin Magnetic Films at Radio Frequencies
Ferromagnetic resonance in thin films has been extended to the radio-frequency region of from 1–20 Mc. Theoretical expressions governing this resonance condition are given along with experimental results. It is found that resonance in this region affords an excellent means of measuring the anisotropy field Hk. Films w…
Indirect evaluation of orientation in polycrystalline materials
Abstract For a polycrystalline material with partial orientation, relations are established between the mean square cosines of the angles ρ between the axis of orientation and lines fixed with the lattice. Experimentally, the mean orientation f = <3/2 cos 2 ρ −1/2 > for the normal to a lattice plane can be deter…