Ionization probability of iron particles at meteoritic velocities

Ion production for ablation of micron size iron particles moving at supersonic speed in air and argo

Ionization probability of iron particles at meteoric velocities

Ion pairs produced by total ablation of iron particles in air and argon measured as function of particle velocit

High voltage breakdown initiated by particle impact

High voltage breakdown initiated by particle impact across electrode ga

Ionization from Fe atoms incident on various gas targets

Ionization from iron atoms incident on target gases of helium, neon, nitrogen, carbon dioxide, and ai

A laboratory measurement of meteor luminous efficiency

Laboratory measurement of meteor luminous efficienc

Protecting Instream Resources in Washington State

56 pages (includes 1 map). Contains 10 pages of footnotes

Protecting Instream Resources in Washington State

56 pages (includes 1 map). Contains 10 pages of footnotes

Drag coefficients of microscopic spheres in free-molecule flow

Drag coefficients of microscopic spheres in free molecule flo

Phase Transitions in Rotating Neutron Stars

As rotating neutron stars slow down, the pressure and the density in the core region increase due to the decreasing centrifugal forces and phase transitions may occur in the center. We extract the analytic behavior near the critical angular velocity $\Omega_0$, where the phase transitions occur in the center of a neutron star, and calculate the moment of inertia, angular velocity, rate of slow down, braking index, etc. For a first order phase transition these quantities have a characteristic behavior, e.g., the braking index diverges as $\sim(\Omega_0-\Omega)^{-1/2}$. Observational consequences for first, second and other phase transitions are discussed.Comment: 5 pages, one figure included, revtex latex styl

kt Effects in Direct-Photon Production

We discuss the phenomenology of initial-state parton-kt broadening in direct-photon production and related processes in hadron collisions. After a brief summary of the theoretical basis for a Gaussian-smearing approach, we present a systematic study of recent results on fixed-target and collider direct-photon production, using complementary data on diphoton and pion production to provide empirical guidance on the required amount of kt broadening. This approach provides a consistent description of the observed pattern of deviation of next-to-leading order QCD calculations relative to the direct-photon data, and accounts for the shape and normalization difference between fixed-order perturbative calculations and the data. We also discuss the uncertainties in this phenomenological approach, the implications of these results on the extraction of the gluon distribution of the nucleon, and the comparison of our findings to recent related work.Comment: LaTeX, uses revtex and epsf, 37 pages, 15 figure