ar X iv : a st ro - p h / 97 01 00 7 v 1 3 J an 1 99 7 R - Process Freezeout , Nuclear Deformation , and the Rare - Earth Element Peak
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چکیده
We use network calculations of r-process nucleosynthesis to explore the origin of the peak in the solar r-process abundance distribution near nuclear mass number A ≈ 160. The peak is due to a subtle interplay of nuclear deformation and beta decay, and forms not in the steady phase of the r-process, but only just prior to freezeout, as the free neutrons rapidly disappear. Its existence should therefore help constrain the conditions under which the r-process occurs and freezes out. 97.10.Cv, 95.30.Cq, 21.10 Typeset using REVTEX
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تاریخ انتشار 1997