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Optical line radiation from uranium plasmas. ph.d. thesis; [for a gaseous core reactor]
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Maceda, E. L. |
| Copyright Year | 1977 |
| Description | The radiative energy current due to line radiation is calculated in a U 235 plasma over a temperature range of 5000 K to 8000 K. Also a variation in the neutron flux of 2 x 10 to the 12th power neutrons/ (sq cm-sec) to 2 x 10 to the 16th power neutrons/(sq cm-sec) is considered. The plasma forms a cylinder with a diameter and height of one meter. To calculate the radiative-energy current, a rate equation formalism is developed to solve for the atomic state densities along with a model for the energy levels in neutral and singly ionized uranium. Because the electron states in uranium lie below 5eV, recombination is the principle excitation mechanism. At and above 6000 K, inversions were found, and at all temperatures the line radiation at line center was greater than the corresponding black-body radiation. There are negligible differences in the radiative-energy current at 6000 K for variations in the neutron flux. The average opacity, which varied from 100 to 100,000 gm/sq cm, over the frequency range of line radiation is calculated. |
| File Size | 12943749 |
| Page Count | 140 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770014994 |
| Archival Resource Key | ark:/13960/t9285464t |
| Language | English |
| Publisher Date | 1977-01-01 |
| Access Restriction | Open |
| Subject Keyword | Nuclear And High-energy Physics Gaseous Fission Reactors Uranium Plasmas Plasma Spectra Radiative Transfer Neutron Flux Density Line Spectra Plancks Constant Reactor Cores Uranium 235 Atomic Energy Levels Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Thesis |
