This study highlights the effects of the electrochemical surface pre-treatment of polished polycrystalline boron-doped diamond electrodes in ethanol on electron transfer to organic redox systems. A novel ‘‘activation’’ procedure based on cathodic polarisation in ethanol (0.01 M NBu4PF6) is proposed and shown to be highly effective in promoting electron transfer to the aqueous FeðCNÞ =4 6 redox ...

When the new data on polarised lepton nucleon scattering are compared at the same value of Q 2 and with a common set of assumptions, a consistent picture of the spin content of the nucleon begins to emerge. Higher order effects in 0(α s), higher twist effects, modern data on unpolarised structure functions and an updated value for F/D are all important in analysing the data. The detailed x depe...

The problem is addressed of how much hot star polarisation variability can result from density redistribution processes within the wind as opposed to localised enhancement of stellar mass loss rate, such as ejections of wind inhomogeneities. For optically thin electron scattering, we present a theory for the relative polarisation arising from particle redistribution and consider several specifi...

At the ILC, the overall scheme for a precise measurement of the beam polarisation conists in the usage of two Compton polarimeters per beam (upand downstream of the e+e− interaction point) and a polarisation measurement from annihilation data [1, 2] to set the absolute scale. The two upand downstream polarimeters are complementary, add redundancy and are used to intercalibrate the systems and r...

The many-body problem of finding a correlation potential in an electron gas is solved as a two-electron problem. The resulting correlation potential for a constant density compares well with other local-density potentials for a wide range of different densities. The formalism is extended for non-constant electron densities and spin-polarisation. For nonlocal exchange we use a simple rescaling o...

the optical spectrum band positions and epr parameters (g factors g//, g^ and hyperfine structure constants a// and a^) for vo2+ ions in zn(antipyrine)2(no3)2 are theoretically studied from the complete diagonalization (of energy matrix) method (cdm) and the perturbation theory method (ptm). in the two methods, the contributions from the spin–orbit (so) coupling of central 3dn ion and ligand ar...

We show that the singlet fraction ps and total magnetisation (or polarisation) m can bound the minimum concurrence in an ensemble of spins. We identify p m 1 2 s 2 ( ) as a sufficient and tight condition for bipartite entanglement. Our proof makes no assumptions about the state of the system or symmetry of the particles, and can therefore be used as a witness for spin entanglement between fermi...

At the magnetic fields of common NMR instruments, electron Zeeman frequencies are too high for efficient electron-nuclear dipolar cross-relaxation to occur in solution. The rate that process fades with frequency as omega^{-2} - absence isotropic hyperfine couplings, liquid state dynamic nuclear polarisation (DNP) high-field magnets is therefore impractical. However, contact coupling and not onl...

We present observations of 35 high spin-down energy radio pulsars using the MeerKAT telescope. Polarisation profiles and associated parameters are also presented. derive geometry for a selection which show interpulse emission. point out that, in several cases, these should be seen $\gamma$-rays but that improved timing is required to aid high-energy detection. discuss relationship between width...

our main objective is a better understanding of spin spin interaction of dinuclear copper(ii) complexes through  system. the synthesis and characterization of two new dinuclear copper(ii) complexes, based on the use of large, pyrole-containing macrocycles, the so called “ expanded porphyrins” , [cu2(macrocycle)]4+ is described. a chloroform solution spectrum of two complexes taken at room tem...