We propose a method for polarising antiprotons in a storage ring by means of a polarised positron beam moving parallel to the antiprotons. If the relative velocity is adjusted to v/c ≈ 0.001 the cross section for spin exchange is as large as 〈σPzz〉 ≈ 2 ·10 barn as shown by new QED-calculations. Two possibilities to provide a positron source with sufficient flux density are presented. A polarise...

In 1995, the HERMES experiment 1],,2] at HERA/DESY started its extensive program to study the spin structure of the nucleon through deep inelastic scattering (DIS) of longitudinally polarised positrons oo polarised ? ! H; ? ! D and 3 ? ! He targets. Inclusive polarised DIS measurements aim at a precise determination of the spin structure functions g 1 and g 2 of the proton and the neutron, usin...

We propose an effective method for polarising antiprotons in a storage ring by means of a parallel moving polarised electron beam. If their relative kinetic energy is adjusted to the order of 1 keV the probability for spin exchange is as large as 〈σPzz〉 ≈ 270 barn. Using a 80% polarised electron beam with a peak current of 1.2 A and an average of 32 mA a polarisation of the antiproton beam of 5...

The metal–molecule interface provides highly attractive fields that interact with each other, such as in charge transfer. However, little is known about the materials localised at the interface. Polarised Raman measurement represents an attractive research field related to metal surfaces. The polarised SERS signal has a highly polarised character because of the anisotropic EM feature on the met...

The metal–molecule interface provides highly attractive fields that interact with each other, such as in charge transfer. However, little is known about the materials localised at the interface. Polarised Raman measurement represents an attractive research field related to metal surfaces. The polarised SERS signal has a highly polarised character because of the anisotropic EM feature on the met...

A natural consequence of the composite operator propagator-vertex description of deep inelastic scattering developed by the authors is that the anomalous suppression observed in the flavour singlet contribution to the first moment of the polarised proton structure function g 1 (the ‘proton spin’ problem) is not a special property of the proton structure but is a target independent effect which ...

Polarisation vision is used by a variety of species in many important tasks, including navigation and orientation (e.g. desert ant), communication and signalling (e.g. stomatopod crustaceans), and as a possible substitute for colour vision (e.g. cephalopod molluscs). Fiddler crabs are thought to possess the anatomical structures necessary to detect polarised light, and occupy environments rich ...

The metal–molecule interface provides highly attractive fields that interact with each other, such as in charge transfer. However, little is known about the materials localised at the interface. Polarised Raman measurement represents an attractive research field related to metal surfaces. The polarised SERS signal has a highly polarised character because of the anisotropic EM feature on the met...