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Showing 1 to 20 of 117 for “"high spin"”.
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The study of high-spin states in 196HG
High-spin states in the oblate deformed even nucleus of mHg have bees studied by y-ray spectroscopy following the t98Pt (a, 6n) 196Hg reaction at an incident energy of 65 MeV. The experiment was performed at iThemba LABS using the AFRODITE array. The y-y coincidence data in two different …
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Mössbauer investigations of high-spin ferrous heme proteins
… of heme proteins containing iron in the high-spin ferrous state is discussed. Paramagnetic hyperfine interactions, induced by strong applied magnetic fields, result in Mössbauer spectra that contain a wealth of information about the symmetry of the active site iron atomo Quantitative …
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Applications of differential geometry to high spin field theories
… to the constraint analysis of relativistic high spin field theories. As a starting point the coordinate dependent descriptions of the Lagrangian and Dirac-Bergmann constraint algorithms are reviewed for general second order systems. These two algorithms are then respectively employed to …
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Geometric frustration in high spin orbit coupling magnetic materials
… of frustrated materials. The ferrimagnetic spinel $\mathrm{CoV_2O_4}$ has been a topic of recent interest, both as a frustrated insulator with unquenched orbital degeneracy and as a near-itinerant magnet which can be driven metallic with moderate applied pressure. Here, we report on our …
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Exploring the Structural, Magnetic, Optical, and Catalytic Properties of High-Spin Materials
… observed in the {Cu4Tb4} cluster. These results highlight the interplay between nuclearity, bridging geometry, and electronic structure in determining the magnetic and optical properties. Project 4 focuses on heterometallic 3d/4f complexes of the form [TM₂Ln(TX-TACN)]⁺ (TM(II) = Cu and Zn; …
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Magnetic and Electronic Properties of Di- and Tetra-Nuclear Mixed-Valence Iron Compounds and High-Spin Five-Coordinate Ferrous Macrocyclic Compounds
Made available in DSpace on 2014-12-13T20:10:21Z (GMT). No. of bitstreams: 1 7804197.pdf: 10969322 bytes, checksum: 567353d1227b18d8a5b9a2f76881d720 (MD5) Previous issue date: 1977
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Synthesis and Coordination Complexes of Bis-Pocket Siloxyporphyrins
A high yield synthetic route for an alkylthiolate-tailed bis-face protected iron porphyrin was developed. The high stability of this compound is likely due to the protection from the siloxy pocket around the thiolate tail. Very similar rhombic, high spin EPR spectra for this model compound and the …
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Inelastic electron scattering and nuclear structure in 140Ce
High-resolution inelastic electron scattering has been performed on 14°Ce. A search for high-spin, stretched-configuration transitions lead to the identification of a J1r = 12- state at 6.31 MeV. This transition has only 8% of the calculated single-particle strength. The absence of strong high-spin …
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Electron spin resonance study of single crystals of cytochrome P450 from Pseudomonas putida
… of cytochrome P450 have been studied by electron spin resonance. Spectra were recorded for orthorhombic crystals (space group P222l , 114 molecules/ unit cell) of the native, substrate-free enzyme (mo),which showed a single signal of spin S=1/2, and of the camphor complex (mos), which showed a …
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Dipole bands in 195BI and 197BI nuclei
High-spin states in 195Bi and 197Bi have been populated using the 181 Ta(20Ne,6n) and 181Ta(22Ne,6n) reactions respectively, both at a beam energy of 125 Mev.
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The effect of trivalent cations on the major lower mantle silicates
… mantle. Ferric iron in perovskite undergoes a spin-pairing transition from the high spin state to low spin in the octahedral site. Ferric iron in the dodecahedral site remains high spin. In the absence of aluminum, the spin transition is gradual between 0 and 55 GPa, and bulk modulus increases …
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An investigation of the nickel (II) and cobalt (II) complexes employing pentadentate ligands derived from salicylaldehyde and bis (3,3'- aminopropyl) ether or sulfide
… speculated as pseudo-square planar or weak low-spin five-coordinate structures. The complexes exhibit anomalous magnetic behavior explained in terms of a spin state isomerism between singlet and triplet spin states. In a non-coordinating solvent, the nickel complexes are pseudo-square planar …
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Advances in Simulating Binary Black Holes
… of the significant computational expense of high-spin simulations, such simulations are sparsely scattered in current public waveform catalogs. However, waveform modeling for detection analysis requires many more data points in this regime to accurately capture the behaviors of high-spin …
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Energy-domain synchrotron radiation Mössbauer source for physics under extreme conditions
… mantle iron may exist in different valence, spin states and crystallographic environments. Most of the existing experimental techniques either do not allow to separately follow evolution of different iron sites or are not suitable for measurements under high-pressure/high-temperature …
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SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING
… involve materials and phenomena featuring both spin and charge transport. SPICE compatible spin circuits with 4-component voltage and current (1 for charge and 3 for spin) have been developed to represent this emerging class of devices. However there has not been much work on circuit …
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Organo-iron compounds on clays and pillared clays.
… heated in air the inserted molecule gave rise to high spin iron(IH) in a distorted octahedral environment. Heating the sample in nitrogen and hydrogen resulted in a species characteristic of high spin octahedrally co-ordinated iron(II). At the higher temperatures, the sample heated in hydrogen …
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Electron spin-lattice relaxation of cytochrome P-450 from Pseudomonas putida
Electron spin-lattice relaxation measurements have been taken on o camphor-free low-spin ferric cytochrome P-450 (mo) and the high-spin species of camphor-bound cytochrome P-450 (mos). Relaxation rates were measured at x-and Ku-band frequencies using the technique of pulse-saturation recovery. The …
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Moessbauer Studies of Photosynthetic Reaction Centers From Rhodopseudomonas Sphaeroides R-26
… dependence. The results are indicative of high-spin ferrous iron (Fe('+2), S = 2) with an approximately invariant first coordination sphere consisting most likely of 6 (or 5) oxygens and nitrogens. The spectra show no evidence for either of the quinones or o-phenanthroline binding directly …
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Structural and Dynamic Aspects of the Cytochrome P450(cam) Protein Conformation
The ferric spin equilibrium of cytochrome P-450$\sb{\rm cam}$ varys from a predominantly low-spin (S = 1/2) form to a predominantly high-spin (S = 5/2) form upon binding the natural substrate camphor. Cytochrome P-450$\sb{\rm cam}$ exhibits a distribution of spin states when various camphor analogs …
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