Lithium-beryllium-boron Evolution: from Meneguzzi, Audouze and Reeves 1971 up to Now
نویسنده
چکیده
We review the main sources of LiBeB production and show that a primary mechanism is at work in the early Galaxy involving both ejection and acceleration of He, C and O at moderate energy, which by nuclear interaction with H and He produce light isotopes. The precise measurement of the Be abundance at [Fe/H] = -3.3 and of Li in halo stars find an explanation in this framework. Thus, the preservation of Li in the atmosphere of metal poor stars implied, points toward the fact the Spite plateau reflects the primordial value of Li. Consequently, it can be used as a baryodensitometer.
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تاریخ انتشار 2001