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Expected gamma-ray emission spectra from the lunar surface as a function of chemical composition
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Trombka, J. I. Arnold, J. R. Reedy, R. C. |
| Copyright Year | 1973 |
| Description | The gamma rays emitted from the moon or any similar body carry information on the chemical composition of the surface layer. The elements most easily measured are K, U, Th and major elements such as O, Si, Mg, and Fe. The expected fluxes of gamma ray lines were calculated for four lunar compositions and one chondritic chemistry from a consideration of the important emission mechanisms: natural radioactivity, inelastic scatter, neutron capture, and induced radioactivity. The models used for cosmic ray interactions were those of Reedy and Arnold and Lingenfelter. The areal resolution of the experiment was calculated to be around 70 to 140 km under the conditions of the Apollo 15 and 16 experiments. Finally, a method was described for recovering the chemical information from the observed scintillation spectra obtained in these experiments. |
| File Size | 1388262 |
| Page Count | 66 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730022064 |
| Archival Resource Key | ark:/13960/t4xh4cf1t |
| Language | English |
| Publisher Date | 1973-02-01 |
| Access Restriction | Open |
| Subject Keyword | Space Sciences Lunar Radiation Inelastic Scattering Flux Density Emission Spectra Gamma Ray Beams Neutron Emission Apollo 15 Flight Chemical Composition Apollo 16 Flight Radioactivity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
