Now showing items 1-10 of 1144
Internal conversion spectra from heavy and medium weight nuclei
Abstract Not Available.
Lifetime of helium metastable spin-states in a helium discharge
The lifetime of a helium 23s1 metastable atom electronic spin-state is measured in helium gas using optical pumping techniques. The metastable atoms are created by an RF electrical discharge. The spin-state lifetime is ...
Energy levels in light nuclei
The recent application of the shell model theory to the energy level structure of light nuclei has made apparent a lack of experimental data concerning these nuclei. The impossibility of accurately criticizing the theory ...
A theoretical study of cyanide on alkali-halide and alkali-metal surfaces using density functional theory
Many interesting physical phenomena have been observed in electron-stimulated desorption studies of the cyanide molecule on alkali halide and alkali metal surfaces. We have performed a theoretical investigation of the ...
A theoretical study of the effects of an external electric field on adsorbate-surface systems
We have used the density functional ab initio method to conduct investigations on the effects of an applied electric field on the chemisorption bonds of adsorbate-surface systems, and on the reactivity of a gas phase ...
A survey of stars and compact sources in the Orion Nebula
Four monochromatic (H$\alpha$, (N II), (O III) and 5500 A continuum) mosaics of the inner region of the Orion Nebula have been made by using data obtained with the Wide Field Planetary Camera 2 of the Hubble Space Telescope. ...
Study of high transverse energy processes in 400 GeV proton-nucleus collisions
A study has been made of 400 GeV proton-nucleus collisions using a large acceptance calorimeter. The targets used were LH$\sb2$, He, Be, C, Al, Cu, Sn and Pb. A geometrically unbiased trigger efficient at selecting hadronic ...
Cometary knots in the Helix Nebula
The central star of the Helix Nebula, the closest planetary nebula, is ringed by hundreds of Cometary Knots. Presented here are images taken with WFPC2 of a field in the northern portion of the bright ring and some physical ...
Absolute differential and integral cross sections for charge transfer of state-selected keV oxygen ion with oxygen(2)
Absolute differential and integral charge transfer cross sections have been measured for 0.5, 0.85, 1.5, 2.8, and 5.0 keV O$\sp+$ with O$\sb2$ at scattering angles between 0.01$\sp\circ$ and 3.50$\sp\circ$ in the laboratory ...
The design and development of Prometheus 1: Rice University's coded aperture faint object gamma ray telescope
Rice University has been developing a gamma ray telescope to be used for the detection of spectral gamma ray lines from Type I supernovae within one megaparsec in the energy range from 100 keV to 10 MeV. The detector is ...