Other
Scientific paper
Apr 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213l...5r&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 213, Apr. 1, 1977, p. L5-L7.
Other
48
Aluminum Isotopes, Galactic Radiation, Gamma Rays, Interstellar Matter, Nuclear Fusion, Supernovae, Abundance, Emission Spectra, Line Spectra, Spectral Line Width
Scientific paper
A detectable gamma-ray line at 1.809 MeV results from the decay of Al-26 in the interstellar medium if this isotope is synthesized in supernovae with abundance of about 0.001 relative to Mg-26. The expected intensity from the direction of the galactic center is approximately 0.0001 photon/sq cm/sec per sr, and the line width is less than 3 keV. This intensity is comparable to the intensities of the other strongest gamma-ray lines resulting from processes of nucleosynthesis at 0.847 MeV from Fe-56, 1.156 MeV from Ca-44, and 1.173 and 1.332 MeV from Ni-60. But the width of the line from Al-26 decay is an order of magnitude smaller than that of either the 0.847- or the 1.156-MeV lines, and hence this line should be much more easily observable with high-resolution detectors.
Lingenfelter Richard E.
Ramaty Reuven
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