Now showing items 31-40 of 1043
Cross sections for dark matter particles and implications for allowed masses, interactions, and detection
(Elsevier, 1986)
We present scattering and annihilation cross sections for a number of candidates for dark matter: heavy neutrinos, photinos, scalar-neutrinos, and higgsinos. In the mass region below about 10 GeV, annihilation cross sections ...
Time‐of‐flight spectrometer for an ECR ion source
(The American Institute of Physics, 1989-03)
A time‐of‐flight ion spectrometer using electrostatic grids for ion gating is described. The spectrometer was built to monitor the charge state distribution of endloss ions passing from the midplane region of an ECR‐heated, ...
The 12C([alpha], n)15O and 16O([alpha], n)19Ne reactions at E[alpha] = 41 MeV
(Elsevier, 1981-06-15)
Spectra and neutron angular distributions have been obtained for the ([alpha], n) reaction on 12C and 16O to (a) determine whether with this reaction more detailed spectroscopic information can be extracted than from ...
A discrete ordinates solution of the Fokker-Planck equation characterizing charged particle transport
(Elsevier, 1980-11-01)
A formalism for obtaining a discrete ordinates solution of the time and space-dependent Fokker-Planck equation governing the transport of charged particles in multispecie plasmas is developed. In the absence of macroscopic ...
Rate processes on fractals: Theory, simulations, and experiments
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1986-01)
Heterogeneous kinetics are shown to differ drastically from homogeneous kinetics. For the elementary reaction A + A → products we show that the diffusion-limited reaction rate is proportional to t − h[A] 2 or to [A] x , ...
Atomic energies from the large‐dimension limit
(The American Institute of Physics, 1987-05-15)
Analytic approximations to nonrelativistic atomic ground state energies are obtained from the first two terms of the 1/D expansion for the N‐electron atom. These two terms describe the equilibrium structure (D→∞ limit) and ...
Ordered shapes in nonequilibrium growth
(Elsevier, 1989-09)
Patterns observed during nonequilibrium growth display complex ordering on many length scales. We focus on ordered patterns which reflect the interplay of microscopic and macroscopic dynamics. The fundamental morphologies ...
Supersymmetry and parastatistics
(Elsevier, 1983-08-25)
An analysis is made of the supersymmetry of parafields in Wess-Zumino-type models with two cases in which parabosons and parafermions form a supermultiplet. In case one the symmetry is realized by either the normal ...
Example of a potential in one-dimensional scattering problem for which there are infinitely many purely imaginary resonances
(Elsevier, 1987-10-05)
The inverse scattering theory methods are used to construct a real-valued potential q(r)[epsilon]C[infinity]0([0, R]), where R>0 is an arbitrary fixed number, which gives rise to infinitely many purely imaginary resonances. ...
Asperity distribution and earthquake occurrence in the southern Kurile Islands arc
(Elsevier, 1987-11)
The seismicity in the southern Kurile Islands arc is characterized by a complex overlapping of aftershock zones of a few great and many large earthquakes (Ms [greater, double equals] 7.0). The spatial relationships of these ...