Al-26: A galactic source of gamma ray line emission

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Galactic Radiation, Gamma Rays, Nuclides, Aluminum Isotopes, Calcium Isotopes, Iron Isotopes, Line Spectra, Magnesium Isotopes, Nickel Isotopes, Photons

Scientific paper

It is shown that Al26 is a very good candidate for producing a detectable gamma-ray line, and that this line is not only intense but also very narrow. By examining the chart of nuclides for other radioactive isotopes which could produce hiterto unnoticed gamma-ray lines following nucleosynthesis, it is found that for mass numbers less than 60, the isotopes Na22, Al26, K40, Ar42, Ti44, Sc46, Mn54, Co56, Co57, Co58, Co60 and Fe60 are the only ones with sufficiently long half lives (70) days to produce gamma rays in optically thin regions.

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