6 Matching Results

Search Results

Results: 1 - 6
open access

Development of the OSO-6 high-energy neutron detector and correlation of measured solar neutron fluxes to solar flares

Description: Thesis. The development of a directional high energy (20 to 160 MeV) neutron detector which was flown to satellite altitudes (500 km; circular equatorial orbit) in the NASA Orbiting Solar Observatory (OSO-6) in August 1969 is described. Both the angle of incidence and the energy of the neutron are determined by a proton-recoil telescope (Pilot B scintillation plastic) which provides the source for proton-recoils and defines the dE/dX versus E method for particle identification and energy determ… more
Date: February 1, 1974
Creator: Young, F.
Partner: UNT Libraries Government Documents Department
open access

Scintillation response of lithium fluoride

Description: Thesis. Lithium fluoride crystals, with TlF added to the charge, were prepared by the Bridgman- Stockbarger method. The scintillation response to photon energies between 25 and 1250 keV for these crystals and a commercially prepared LiF (Ti) crystal was studied. The response of the LiF (Ti) crystal was compared to the response of an NE109 scintillator at 1250 keV. The dose response of the LiF (Ti) crystal was evaluated over the energy range 25 to 1250 keV. The absorption and emission spectra of… more
Date: February 11, 1974
Creator: Kloepping, R.J.
Partner: UNT Libraries Government Documents Department
open access

Delayed neutron emission from mass-separated fission products

Description: Thesis. Delayed neutron characteristics of six fission product nuclides were determined using a mass separator operated on-line with a nuclear reactor. Beta-decay half-lives were- measured using neutron multiscaling techniques for the precursors /sup 88/Br, /sup 89/Br, /sup 98/Kr, /sup 93/Kr, /sup 137/I, and / sup 138/I. The observed half-lives were 16.52 plus or minus .17 seconds, respectively.. Energy spectra were measured for delayed neutrons emitted in the beta-decays of /sup 17/N, /sup 137… more
Date: February 1, 1974
Creator: Norman, J.H.
Partner: UNT Libraries Government Documents Department
open access

Internal friction in intrinsic and N-type germanium and silicon

Description: The high-temperature internal friction of germanium and silicon, intrinsic and highly n-type, was measured as a function of temperature, frequency, dislocation density, and dopant concentration. Two features found in the internal-friction spectrum were investigated. At moderate temperatures in both materials, when not too highly doped, there appears a peak, the features of which are independent of dislocation density, due to the acousto-electric effect. The high-temperature dislocation-dependen… more
Date: February 1, 1974
Creator: Gerk, Alvin Phillip
Partner: UNT Libraries Government Documents Department
Back to Top of Screen