Statistics – Applications
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978grsa.rept...98r&link_type=abstract
In NASA. Goddard Space Flight Center Gamma Ray Spectry. in Astrophys. p 98-148 (SEE N78-31971 22-88)
Statistics
Applications
1
Astronomical Spectroscopy, Emission Spectra, Gamma Rays, Line Spectra, Planetary Radiation, Energetic Particles, Extraterrestrial Radiation, Moon, Planetary Surfaces, Radioactive Decay, Spectrum Analysis
Scientific paper
The measured intensities of certain gamma rays of specific energies escaping from a planetary surface can be used to determine the abundances of a number of elements. The fluxes of the more intense gamma-ray lines emitted from 32 elements were calculated using current nuclear data and existing models for the source processes. The source strengths for neutron-capture reactions were modified from those previously used. The fluxes emitted form a surface of average lunar composition are reported for 292 gamma-ray lines. These theoretical fluxes were used elsewhere to convert the data from the Apollo gamma-ray spectrometers to elemental abundances and can be used with measurements from future missions to map the concentrations of a number of elements over a planet's surface. Detection sensitivities for these elements are examined and applications of gamma-ray spectroscopy for future orbiters to Mars and other solar-system objects are discussed.
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