The impact parameter formalism of the single-center close-coupling, first-, and second-order Born approximations have been applied to investigate direct excitations of Helium He+(2s) and Lithium Li++(2s) ions by colliding with protons or antiprotons. The total 3s, 3p, and 3d scaled excitation cross sections are calculated in the scaled impact energy region (2 to 1000 keV). The present work aims...

The study investigated the role of excitation in energy harvesting applications. While the energy ultimately comes from the excitation, it was shown that the excitation may not always behave as a source. When the device characteristics do not perfectly match the excitation, the excitation alternately behaves as a source and a sink. The extent to which the excitation behaves as a sink determines...

Positron annihilation is a well established method in solid state physics and material science. The positron being a very sensitive probe, can give very precise information on the momentum distribution of electrons in metals and alloys as well as on lattice defects in crystals. Starting with the energy distribution of positrons from a radioactive decay, the current development is directed more ...

The increasing significance of non-standard positron emission tomography (PET) nuclides in medicine is briefly outlined. The decay data of those radionuclides are generally well known, except for the positron emission intensity (Ibeta+) in a few cases. The recent precise measurements on the Ibeta+ values for (64)Cu, (76)Br, (120)I and (124)I are described. Some general aspects of cyclotron prod...

Knowledge of the energy spectrum of 8B neutrinos is important for interpreting experiments that detect energetic neutrinos from the Sun. The neutrino spectrum deviates from the allowed β-decay approximation because of the broad α-unstable 8Be final state and recoil order corrections. We have measured the total energy of the α particles emitted following the β decay of 8B. The measured α spectru...

In this paper, we consider the utilization of optical amplifiers with bandwidth ∆f ∼= 1014Hz for use in stochastic cooling. It is shown that quadrupole and dipole wigglers can be used as pickups and kickers respectively. The proposed method increases the application of the stochastic cooling method beyond the traditional area of proton-antiproton cooling. For example, the method can also be app...

The radioisotope Nb decays with a positron branching of 53% and a relatively low β+-energy of Emean = 0.66 MeV and Emax = 1.5 MeV. Its half-life of 14.6 h makes it especially promising for quantitative investigation of biological processes with slow distribution kinetics using positron emission tomography. To optimise its production, the excitation functions of Zr(p, xn)-processes were studied ...

From the sixties a deep and surprising connection has followed development of superconductivity quantum field theory. The Anderson-Higgs mechanism similarities between Dirac Bogoliubov-de Gennes equations are most intriguing examples. In this last analogy, massive particle is identified with quasiparticle excitation fermion mass energy superconducting gap energy. Here we follow further parallel...