References in periodicals archive ?
where W([E.sub.e],[p.sub.e],[p.sub.[~.v]) is the probability of neutron [beta]-decay; [E.sub.e], [p.sub.e] are the energy and momentum of the electron; [p.sub.[-.v]] is the momentum of the antineutrino; v is the velocity of the electron; a, A, B are the correlation coefficients; [sigma] is the neutron spin; P is the neutron beam polarization.
Roughly speaking, an electron from an exciton strikes au electron bound to an atom, creating another exciton.
Unlike previous measurements [3-16] which are capable of measuring only one correlation coefficient such as A (the correlation between the neutron spin and the decay electron momentum), our experiment will provide a complete set of correlations including not only A, but also B (the correlation between the neutron spin and the decay neutrino), a (the correlation between the neutrino momentum and the decay electron momentum), and the electron energy spectral distortion term b.
(*) Konsilarlaboratorium fur die Elektronenmikroskopische Erregerdiagnostik in the Robert Koch Institut, Electron Microscopy and Imaging Group, D13353 Berlin, Germany; and ([dagger]) Electron Microscopy Unit, Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Canada
Here X(E) is the experimental asymmetry for some slice of electron energy E:
Lacking oxygen, these microbes transfer their electrons to the anode.
Coincidences between electrons and protons are detected in a field-expansion spectrometer.
Electron spins can exert rotational forces, or torques, on each other, much as arm wrestlers create torques as they push against each other.
The main features of radiative [beta]-decay have been derived in the classical approximation by Jackson [1] who assumes that an electron is created at the origin at t = 0 with constant velocity v = c[beta], in which case radiation of angular frequency [omega] is emitted in the direction of the unit vector n with an angular distribution in energy per unit time per unit interval of angular frequency
The solenoid has been designed to have a slight (9.5[degrees]) bend in the magnetic field direction at one end allowing the decay proton and electron to be guided out of the beam and into a charged particle detector held at a high negative potential ([approximately equal to] -30 kV) to accelerate the low energy protons to detectable energies.
It's a new variation of the electron microscope, which aims beams of electrons at a sample in order to image it.