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Gamma rays from the de-excitation of c-12 resonance 15.11 mev and c-12 resonance 4.44 mev as probes of energetic particle spectra
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Crannell, H. Ramaty, R. Crannell, C. J. |
| Copyright Year | 1977 |
| Description | The flux of 15.11 MeV gamma rays relative to the flux 4.44 MeV gamma rays was calculated from measured cross sections for excitation of the corresponding states of C-12 and from experimental determinations of the branching ratios for direct de-excitation of these states to the ground state. Because of the difference in threshold energies for excitation of these two levels, the relative intensities in the two lines are particularly sensitive to the spectral distribution of energetic particles which excite the corresponding nuclear levels. For both solar and cosmic emission, the observability of the 15.11 MeV line is expected to be enhances by low source-background continuum in this energy range. |
| File Size | 4952097 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770019117 |
| Archival Resource Key | ark:/13960/t7pp3wg9b |
| Language | English |
| Publisher Date | 1977-05-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Gamma Rays Excitation Line Spectra Solar Flares Emission Spectra 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 | Article |
