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- W1650590968 abstract "Evidence is reviewed for the presence of short-lived Al-26 (half-life of 720,000 years) in the early solar system. Large excesses of Mg-26 of up to 5% have been found in Ca-Al-rich inclusions of the Allende meteorite. The Mg excesses correlate well with Al-27/Mg-24 and in two cases they are found in high-purity separates of coarse-grained Al-rich minerals which tend to exclude Mg. The data demonstrate that Al-26 was present in the early solar system. Mechanisms for addition of Al-26 to the solar nebula or for production within an active solar system are required within a few million years of condensation of small (centimeter-sized) objects. The Al-26 abundance in Allende inclusions is high enough to provide for effective melting of kilometer-size bodies or larger, if such bodies accreted early enough (a few million years) to incorporate the Al-26." @default.
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- W1650590968 date "1977-01-01" @default.
- W1650590968 modified "2023-09-27" @default.
- W1650590968 title "Evidence for Al-26 in the solar system" @default.
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