13,280 research outputs found
Domains of holomorphy for irreducible unitary representations of simple Lie groups
We classify the domains of holomorphy of all Harish-Chandra modules of
irreducible unitary representations of simple non-compact Lie groups.Comment: revised version, to appear in Invent. math., 14 page
The solubility and oxidation state of nickel in silicate melt at low oxygen fugacities: Results using a mechanically assisted equilibration technique
The solubility of Ni in a silicate melt has been measured using a new, mechanically assisted equilibration technique over a wide range of controlled ƒO2 values. The melt composition corresponds to the 1 atm eutectic in the system CaAl2Si2O8-CaMgSi2O6 + 10 wt% CaO. The experiments were performed at 1300°C and over an ƒO2 range of 10−8.5 to 10−13.75, and over a temperature range of 1270 to 1390°C at a constant gas mixing ratio ( ). The experiment consists of a sample of melt contained within a crucible of Ni metal and held in a 1 atm gas mixing furnace. A Ni spindle is entered into the sample from above and continuously rotated at a constant angular velocity using a viscometer head. The stirring of the sample serves to accelerate the approach to equilibrium between the liquid sample and the metal crucible (and spindle). This arrangement allows relatively rapid equilibration of Ni content following changes to higher or lower ƒO2 values. Samples of the melt may be taken at any time for analysis and thus the equilibrium solubility of Ni in the silicate melt may be determined from unambiguous experimental reversals. The Ni contents of samples, analysed both by INAA and by ICP-AES, range from 25 to 5300 ppm.
The data presented in this paper indicate that the oxidation state of Ni in the investigated melt is Ni2+ over the entire range of Æ’O2 investigated. This conclusion contrasts with recent reports in the literature of an inflection in the Æ’O2 dependence of Ni solubility, which has been interpreted as solution of neutral Ni at low Æ’O2 (Morse et al., 1991; Colson, 1992; Ehlers et al., 1992). We also present data for the temperature dependence of Ni solubility in the investigated melt. The solubility decreases with increasing temperature at constant Æ’O2. The present results are in good agreement with the metal-loop-equilibration experiments reported by Holzheid et al. (1994)
Bernhard GROM, PsicologÃa de la religión, Herder, Barcelona 1994, 476 pp., 14 x 21,5. [RECENSIÓN]
Non-Locality of Experimental Qutrit Pairs
The insight due to John Bell that the joint behavior of individually measured
entangled quantum systems cannot be explained by shared information remains a
mystery to this day. We describe an experiment, and its analysis, displaying
non-locality of entangled qutrit pairs. The non-locality of such systems, as
compared to qubit pairs, is of particular interest since it potentially opens
the door for tests of bipartite non-local behavior independent of probabilistic
Bell inequalities, but of deterministic nature
Alien Registration- Cook, Bernhard B. (Troy, Waldo County)
https://digitalmaine.com/alien_docs/4734/thumbnail.jp
Muon-spin-rotation study of the magnetic structure in the tetragonal antiferromagnetic state of weakly underdoped BaKFeAs
With muon spin rotation (SR) we studied the transition between the
orthorhombic antiferromagnetic (o-AF) and the tetragonal antiferromagnetic
(t-AF) states of a weakly underdoped BaKFeAs
single crystal. We observed some characteristic changes of the magnitude and
the orientation of the magnetic field at the muon site which, due to the fairly
high point symmetry of the latter, allow us to identify the magnetic structure
of the t-AF state. It is the so-called, inhomogeneous double-
magnetic structure with -axis oriented moments which has a vanishing
magnetic moment on half of the Fe sites.Comment: 5 pages, 4 figures. Supplementary Material: 8 figure
- …